# List of the Paleozoic life of Texas

This list of the Paleozoic life of Texas contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Texas and are between 538.8 and 252.17 million years of age.

## A

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Aboculus – type locality for genus
** †Aboculus robustus – type locality for species
* †Acanthocladia
** †Acanthocladia americana
** †Acanthocladia guadalupensis
* †Acanthoclema
* †Acanthocoryna
** †Acanthocoryna stauroma
* †Acanthocrania
** †Acanthocrania alta – type locality for species
** †Acanthocrania conferta – type locality for species
** †Acanthocrania densispina – type locality for species
** †Acanthocrania intermedia
** †Acanthocrania magna
** †Acanthocrania minutispinosa – type locality for species
** †Acanthocrania platys – type locality for species
** †Acanthocrania regularis
** †Acanthocrania vasta – type locality for species
* †Acanthopecten
** †Acanthopecten carboniferus – or unidentified related form
** †Acanthopecten coloradoensis
** †Acanthopecten delawarensis – type locality for species
* †Acanthoplecta
** †Acanthoplecta inopinata – type locality for species
* †Acanthorota – type locality for genus
** †Acanthorota permiana – type locality for species
* †Acanthoschizorota – type locality for genus
** †Acanthoschizorota variabilis – type locality for species
* Restoration of the Permian amphibian Acheloma †Acheloma – type locality for genus
** †Acheloma cumminsi – type locality for species
* †Achistrum
** †Achistrum brownwoodensis – type locality for species
** †Achistrum ludwigi – type locality for species
** †Achistrum monochordata
* †Acolosia – type locality for genus
** †Acolosia anomala – type locality for species
** †Acolosia elliptica
** †Acolosia exasperata
** †Acolosia glabra
** †Acolosia magna
** †Acolosia recepta – type locality for species
* †Acosarina
** †Acosarina baylorensis – type locality for species
** †Acosarina mesoplatys – type locality for species
** †Acosarina minuta – type locality for species
** †Acosarina peculiaris – type locality for species
** †Acosarina rectimarginata
* †Acritosia
** †Acritosia magna
** †Acritosia magnifica
** †Acritosia peculiaris – type locality for species
** †Acritosia silicica
** †Acritosia solida
** †Acritosia teguliferoides – type locality for species
** †Acritosia vestibula
* Fossilized teeth of the Permian-Paleocene cartilaginous fish Acrodus †Acrodus – tentative report
** †Acrodus olsoni – type locality for species
** †Acrodus sweetlacruzensis – type locality for species
* †Acrothele
* †Actinocoelia
** †Actinocoelia maeandrina
** †Actinocoelia verrucosa – type locality for species
* †Actinoconchus
* †Actinohymen – type locality for genus
** †Actinohymen russelli – type locality for species
* †Actinophrentis
** †Actinophrentis bonespringense – type locality for species
** †Actinophrentis columnare – type locality for species
* †Acutichiton
** †Acutichiton pannuceus – type locality for species
** †Acutichiton pyrmidalus
* †Adamantina
** †Adamantina foliacea
* †Adlatipora – type locality for genus
** †Adlatipora fossulata – type locality for species
* †Adrianites – tentative report
* †Agathiceras
** †Agathiceras applini – type locality for species
** †Agathiceras ciscoense – type locality for species
** †Agathiceras contractum – type locality for species
** †Agathiceras frechi – type locality for species
** †Agathiceras girtyi – type locality for species
** †Agathiceras uralicum
* †Agelesia
** †Agelesia triagonalis – type locality for species
* †Agmoblastus
** †Agmoblastus caddense – type locality for species
* †Agnostocrinus
** †Agnostocrinus ornatus – type locality for species
* †Akmilleria
** †Akmilleria adkinsi – type locality for species
** †Akmilleria electraensis
** †Akmilleria huecoensis – type locality for species
* †Albaillella
** †Albaillella foremanae – type locality for species
* †Alegeinosaurus
* Fossilized fronds of the Carboniferous-Early Cretaceous seed fern Alethopteris †Alethopteris
* †Alilepis
* †Alisporites
** †Alisporites plicatus – type locality for species
** †Alisporites zapfei
* †Allagecrinus
** †Allagecrinus bassleri
* †Allopiloceras
* †Allorhynchus
** †Allorhynchus circulare
** †Allorhynchus concentricum
** †Allorhynchus formulosum
** †Allorhynchus permianum – type locality for species
** †Allorhynchus triangulatum – type locality for species
** †Allorhynchus variabile – type locality for species
** †Allorhynchus venustulum
* †Allorisma – tentative report
** †Allorisma albequus
** †Allorisma dubium – or unidentified related form
* †Allotropiochisma
** †Allotropiochisma flabellum – type locality for species
** †Allotropiochisma texanum – type locality for species
** †Allotropiochisma uddenitense – type locality for species
* †Almites
** †Almites sellardsi – type locality for species
* †Altadema – type locality for genus
** †Altadema convexa – type locality for species
* †Altiplecus
** †Altiplecus argutus
** †Altiplecus cooperi
** †Altiplecus deltosus
** †Altiplecus extensus
** †Altiplecus glebosus – type locality for species
** †Altiplecus periosus
** †Altiplecus trapezoidalis
* †Altudoceras
** †Altudoceras altudense – type locality for species
** †Altudoceras cooperi – type locality for species
** †Altudoceras serratum – type locality for species
* †Alveus – type locality for genus
** †Alveus depressus – type locality for species
* †Amandophyllum
* †Amaurotoma
** †Amaurotoma subsinuata
* †Amblysiphonella
* †Ambozone
** †Ambozone dictyonema
* †Ametoria – type locality for genus
** †Ametoria residua – type locality for species
* †Ammovertella
* †Amphicrinus
* †Amphipella
** †Amphipella arcaria
** †Amphipella attenuata
* †Amphiscapha
** †Amphiscapha catilloides
** †Amphiscapha dextrata – type locality for species
** †Amphiscapha gigantea – type locality for species
** †Amphiscapha muricata
** †Amphiscapha subquadrata
* †Amphissites
** †Amphissites centronotus – or unidentified comparable form
** †Amphissites knighti – type locality for species
* †Amplexizaphrentis
* †Amplexocarinia
* †Amplexus – report made of unidentified related form or using admittedly obsolete nomenclature
* Fossilized shell of the Carboniferous-modern scallop Amusium Amusium – tentative report
* †Ananias
** †Ananias appeli
** †Ananias labrectus
** †Ananias ootomaria – type locality for species
** †Ananias permianus
** †Ananias welleri
* †Anatsabites
** †Anatsabites multiliratus – type locality for species
** †Anatsabites williamsi
* †Anconochilus – type locality for genus
** †Anconochilus barnesi – type locality for species
* †Anemonaria
** †Anemonaria sublaevis – type locality for species
* †Aneuthelasma
** †Aneuthelasma amygdalinum
* †Angelosaurus – type locality for genus
** †Angelosaurus dolani – type locality for species
** †Angelosaurus greeni – type locality for species
* †Angyomphalus
* †Anisodexis
* †Anisopyge – type locality for genus
** †Anisopyge cooperi – type locality for species
** †Anisopyge perannulata – type locality for species
* Fossil of the Carboniferous horsetail relative Annularia †Annularia
** †Annularia maxima
** †Annularia spicata
** †Annularia stellata – or unidentified comparable form
* †Annuliconcha
** †Annuliconcha dentata
** †Annuliconcha interlineata
* †Anodontacanthus
** †Anodontacanthus americanus
* †Anomalesia
** †Anomalesia perplexa
* †Anomaloria
** †Anomaloria anomala
* †Anomphalus
** †Anomphalus studiosus – type locality for species
** †Anomphalus umbilicatus – or unidentified comparable form
** †Anomphalus verruculiferus
* †Anopliopsis
** †Anopliopsis subcarinata
* †Anoptychia
* †Anteridocus – type locality for genus
** †Anteridocus bicostatus
** †Anteridocus erugatus
** †Anteridocus eximius
** †Anteridocus gongylus – type locality for species
** †Anteridocus paucicostatus – type locality for species
** †Anteridocus seminudus
** †Anteridocus subcarinatus
** †Anteridocus swallovianus – type locality for species
** †Anteridocus triangulatus
* †Anthracopupa
** †Anthracopupa ohioensis
* †Anthracosycon
** †Anthracosycon auriforme – type locality for species
** †Anthracosycon ficus
** †Anthracosycon regulare
* †Antiquatonia
** †Antiquatonia inflativentra
** †Antiquatonia portlockianus
* †Antronaria – type locality for genus
** †Antronaria dissona – type locality for species
** †Antronaria emarginata
** †Antronaria indentata
** †Antronaria mesicostalis – type locality for species
** †Antronaria pluricosta
** †Antronaria specialis
** †Antronaria speciosa – type locality for species
** †Antronaria spectabilis
** †Antronaria titania
** †Antronaria transversa
** †Antronaria voluminosa – type locality for species
* †Apachella
** †Apachella capertoni – type locality for species
** †Apachella exaggerata
** †Apachella franciscana
** †Apachella glabra – type locality for species
** †Apachella huecoensis – type locality for species
** †Apachella nodosa
** †Apachella powwowensis – type locality for species
** †Apachella prodontia
** †Apachella pseudostrigillata
** †Apachella texana – type locality for species
** †Apachella translirata
** †Apachella turbiniformis
* †Apatokephalus
** †Apatokephalus serratus
* †Aphaurosia
** †Aphaurosia rotundata
** †Aphaurosia scutata
* †Aphelaspis
* Restoration of the Late Ordovician nautiloid cephalopod Aphetoceras being preyed upon by a Cameroceras †Aphetoceras
* †Aphlebia
* †Apographiocrinus
** †Apographiocrinus arcuatus – or unidentified comparable form
** †Apographiocrinus raderi – type locality for species
** †Apographiocrinus typicalis
* †Apotocardium
** †Apotocardium cordatum – type locality for species
** †Apotocardium obliquum
* †Apsisaurus – type locality for genus
** †Apsisaurus witteri – type locality for species
* †Apsotreta
** †Apsotreta expansa
* †Apterrinella – tentative report
* †Araeonema
** †Araeonema virgatum
* Life restoration of the Permian reptile Araeoscelis †Araeoscelis – type locality for genus
** †Araeoscelis casei
** †Araeoscelis gracilis – type locality for species
* †Araucarites
* †Araxathyris – or unidentified comparable form
* †Arceodomus
** †Arceodomus prolata – type locality for species
* †Archaeocidaris
** †Archaeocidaris brownwoodensis – type locality for species
** †Archaeocidaris cratis
* †Archaeocycas
** †Archaeocycas whitei
* Archaeolithophyllum
* †Archaeolithoporella
* †Archaeoscyphia
** †Archaeoscyphia annulata
* Life restoration of the Permian amphibian Archeria †Archeria – type locality for genus
** †Archeria crassidisca – type locality for species
* †Archimedes
* †Arcochiton
** †Arcochiton raymondi
* †Arcuolimbus
** †Arcuolimbus convexus
* †Arionthia – type locality for genus
** †Arionthia alata
** †Arionthia blothrhachis – type locality for species
** †Arionthia germana – type locality for species
** †Arionthia lamaria
** †Arionthia polypleura
* †Aristoceras
** †Aristoceras appressum
* †Armenoceras
** †Armenoceras australe
* †Arrectocrinus
** †Arrectocrinus major – type locality for species
** †Arrectocrinus texanus – type locality for species
* †Artinskia
** †Artinskia artiensis
** †Artinskia lilianae – type locality for species
* †Artisia
* †Asaphellus
* †Aspidiopsis
* †Aspidosaurus – type locality for genus
** †Aspidosaurus binasser – type locality for species
** †Aspidosaurus chiton – type locality for species
** †Aspidosaurus glascocki – type locality for species
** †Aspidosaurus peltatus – type locality for species
* †Assimulia
** †Assimulia abscessa – type locality for species
** †Assimulia arta – type locality for species
** †Assimulia compacta – type locality for species
** †Assimulia flexibilis – type locality for species
** †Assimulia fracta – type locality for species
** †Assimulia frequentis – type locality for species
** †Assimulia recrea – type locality for species
** †Assimulia tergida – type locality for species
** †Assimulia uddenitense – type locality for species
* †Astartella
** †Astartella concentrica
** †Astartella nasuta
** †Astartella subquadrata
* †Astegosia
** †Astegosia subquadrata
* †Atelestegastus
** †Atelestegastus marginatus
* †Athlocrinus
* †Athyris
** †Athyris bradyensis – type locality for species
* †Attenuatella
** †Attenuatella texana
* †Aulopora – report made of unidentified related form or using admittedly obsolete nomenclature
* †Aulosteges
* †Aurikirkbya
** †Aurikirkbya auriformis – type locality for species
** †Aurikirkbya barbarae – type locality for species
** †Aurikirkbya wordensis – type locality for species
* †Austinella
** †Austinella kankakensis
* †Australosutura
** †Australosutura llanoensis
* Mold fossil of a shell of the Early Devonian-Late Triassic bivalve Aviculopecten †Aviculopecten
** †Aviculopecten ballingerana
** †Aviculopecten girtyi – type locality for species
** †Aviculopecten gryphus – type locality for species
** †Aviculopecten herzeri
** †Aviculopecten occidentalis
** †Aviculopecten sumnerensis
** †Aviculopecten texanus
* †Aviculopinna
* †Avonia
** †Avonia honeycreekensis – type locality for species
** †Avonia latidorsata
** †Avonia meekana
** †Avonia pustulifera – or unidentified comparable form
** †Avonia signata
** †Avonia subhorrida
** †Avonia walcottiana
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## B

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Babylonites – type locality for genus
** †Babylonites acutus – type locality for species
** †Babylonites carinatus – type locality for species
** †Babylonites conicus – type locality for species
** †Babylonites turritus – type locality for species
* †Bactrites
** †Bactrites elcapitanensis
* †Baiosoma
** †Baiosoma pala – type locality for species
* Bairdia
** †Bairdia guadalupiana – type locality for species
** †Bairdia permiana – type locality for species
** †Bairdia plebeia – or unidentified related form
** †Bairdia pruniseminata – type locality for species
** †Bairdia rhomboidalis – type locality for species
** †Bairdia subfusiformis – type locality for species
** †Bairdia wordensis – type locality for species
* †Bakevellia
* †Balkoceras – type locality for genus
** †Balkoceras gracile – type locality for species
* †Bamberina
** †Bamberina annectens
* †Bamyaniceras
** †Bamyaniceras knighti
** †Bamyaniceras simile
* †Barbclabornia
** †Barbclabornia luedersensis – type locality for species
* †Barnesoceras – type locality for genus
** †Barnesoceras clavatum – type locality for species
** †Barnesoceras conosiphonatum – type locality for species
** †Barnesoceras expansum – type locality for species
** †Barnesoceras lamellosum – type locality for species
** †Barnesoceras lentiexpansum – type locality for species
** †Barnesoceras percurvatum – type locality for species
** †Barnesoceras transversum – type locality for species
* †Bathyglyptus – type locality for genus
** †Bathyglyptus theodori – type locality for species
* †Bathymyonia
** †Bathymyonia nevadensis
* †Bathyurellus
* †Baylea
** †Baylea delawarensis – type locality for species
** †Baylea huecoensis – type locality for species
** †Baylea knighti
** †Baylea kuesi – type locality for species
** †Baylea subconstricta
** †Baylea supercrenata – or unidentified comparable form
** †Baylea vjatkensis
* †Beecheria
** †Beecheria chouteauensis
** †Beecheria elliptica
** †Beecheria expansa
* Fossilized shell of the Silurian-Early Triassic mollusc Bellerophon †Bellerophon – tentative report
* †Bellerophon
** †Bellerophon complanatus – type locality for species
** †Bellerophon deflectus
** †Bellerophon graphicus
** †Bellerophon hilli – type locality for species
** †Bellerophon huecoensis – type locality for species
** †Bellerophon kingorum – type locality for species
** †Bellerophon majusculus
** †Bellerophon parvicristus – type locality for species
* †Bellerophor
* †Belodella
** †Belodella silurica
** †Belodella striata – or unidentified comparable form
* †Beltella
* †Bembexia
* †Biarmeaspira
** †Biarmeaspira multilineata
* †Bicuerda
** †Bicuerda columnare – type locality for species
* †Bighornia
** †Bighornia patella – or unidentified comparable form
* †Bitaunioceras
** †Bitaunioceras texanum – type locality for species
* †Blountia
** †Blountia assimilis
** †Blountia ovata
* †Blountiella
* †Blountina
** †Blountina westoni – or unidentified related form
* †Boesites
** †Boesites kingi – type locality for species
** †Boesites scotti – type locality for species
** †Boesites texanus – type locality for species
* Illustration of a fossilized skull of the Permian primitive reptile Bolosaurus †Bolosaurus – type locality for genus
** †Bolosaurus major – type locality for species
** †Bolosaurus striatus – type locality for species
* †Borestus
** †Borestus magdalenensis – type locality for species
** †Borestus texanus – type locality for species
* †Bothrionia – type locality for genus
** †Bothrionia guadalupensis
** †Bothrionia nasuta – type locality for species
** †Bothrionia pulchra
** †Bothrionia transversa – type locality for species
* †Bothrostegium – type locality for genus
** †Bothrostegium compactum – type locality for species
** †Bothrostegium derbyoideum
** †Bothrostegium pusillum
* †Boultonia
** †Boultonia guadalupensis – type locality for species
* †Bowmanites
* Life restoration of the Carboniferous amphibian Brachydectes †Brachydectes
** †Brachydectes elongatus
* †Brachydegma
** †Brachydegma caelatum
* †Brachymetopus – tentative report
** †Brachymetopus rhinorhachis – type locality for species
* †Brachyphyllum – tentative report
** †Brachyphyllum densum – type locality for species
* †Brachythyris
** †Brachythyris chouteauensis
* †Bradyphyllum
** †Bradyphyllum coagmentum – type locality for species
** †Bradyphyllum counterseptatum – type locality for species
** †Bradyphyllum postwannense – type locality for species
* †Branneroceras
** †Branneroceras branneri
* †Brochidium
** †Brochidium morrisi – type locality for species
* Life restoration of the Permian amphibian Broiliellus †Broiliellus – type locality for genus
** †Broiliellus arroyoensis – type locality for species
** †Broiliellus brevis – type locality for species
** †Broiliellus olsoni – type locality for species
** †Broiliellus peltatus – type locality for species
** †Broiliellus texensis – type locality for species
* †Bryograptus
* †Bryorhynchus
** †Bryorhynchus bisulcatum – type locality for species
** †Bryorhynchus gratiosum – type locality for species
** †Bryorhynchus nitidum
** †Bryorhynchus plicatum
* †Bucanopsis
** †Bucanopsis type locality for species – informal
* †Buekkella
** †Buekkella digitata – type locality for species
* †Burenoceras
** †Burenoceras cornucopia – type locality for species
** †Burenoceras muricoides – type locality for species
** †Burenoceras phragmoceroides – type locality for species
* Bythocypris
* †Byzantia – type locality for genus
** †Byzantia obliqua – type locality for species

## C

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
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* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Life restoration of the Permian amphibian Cacops †Cacops
** †Cacops aspidephorus – type locality for species
* †Cactosteges – type locality for genus
** †Cactosteges anomalus – type locality for species
* †Calamites
** †Calamites undulatus
* †Calapoecia
** †Calapoecia ungava – or unidentified comparable form
* †Calathium
* †Calcivertella
* †Calclamnella
* †Calclyra
** †Calclyra eiseliana
** †Calclyra spathulata – type locality for species
** †Calclyra spinata – type locality for species
** †Calclyra triangulata – type locality for species
* †Calliprotonia
* Fossilized fronds of the Carboniferous seed fern Callipteridium †Callipteridium
** †Callipteridium pteridium – or unidentified comparable form
** †Callipteridium virginianum
* †Callipteris
** †Callipteris conferta
** †Callipteris flabellifera
* †Callispirina
** †Callispirina rotunda
* †Callistadia – type locality for genus
** †Callistadia bella – type locality for species
* †Callitomaria
** †Callitomaria magna – type locality for species
** †Callitomaria stanislavi
* †Calophyllum – tentative report
* †Calycocoelia
** †Calycocoelia typicalis
* †Camarelasma
** †Camarelasma neali
* †Camarophorella
** †Camarophorella dorsata – type locality for species
* †Camarophorina – tentative report
* †Camarotoechia
* †Campophyllum – tentative report
** †Campophyllum texanum – type locality for species
* †Camptochiton – type locality for genus
** †Camptochiton squarrosus – type locality for species
* †Camptonectes – tentative report
* †Cancrinella
** †Cancrinella boonensis – tentative report
** †Cancrinella parva
** †Cancrinella planumbona
** †Cancrinella sparsispinosa
** †Cancrinella subquadrata – type locality for species
* †Caneyella
** †Caneyella wapanuckensis
* †Capillomesolobus
** †Capillomesolobus permianus
* †Captorhinikos
** †Captorhinikos chozaensis – type locality for species
** †Captorhinikos valensis
* †Captorhinoides – type locality for genus
** †Captorhinoides valensis – type locality for species
* Life restoration of the Permian reptile Captorhinus †Captorhinus – type locality for genus
** †Captorhinus aguti – type locality for species
** †Captorhinus laticeps – type locality for species
* †Carbonicola
* †Carbonocoryphe
** †Carbonocoryphe depressa
** †Carbonocoryphe planucauda
* †Cardiella
** †Cardiella electraensis
** †Cardiella ganti
** †Cardiella sulcata – type locality for species
* Life restoration of the Permian amphibian Cardiocephalus †Cardiocephalus – type locality for genus
** †Cardiocephalus sternbergi – type locality for species
* †Cardiomorpha
* †Carphites – type locality for genus
** †Carphites diabloensis – type locality for species
** †Carphites plectus
* †Carpolithes
* †Carrolla – type locality for genus
** †Carrolla craddocki – type locality for species
* †Cartorhium – type locality for genus
** †Cartorhium chelomatum – type locality for species
** †Cartorhium coristum
** †Cartorhium latum – type locality for species
** †Cartorhium mexicanum – type locality for species
** †Cartorhium orbiculatum
** †Cartorhium retusum
** †Cartorhium vidriense – type locality for species
** †Cartorhium zoyei – type locality for species
* Life restoration of the Permian synapsid (mammal precursor) Casea †Casea – type locality for genus
** †Casea broilii – type locality for species
** †Casea halselli – type locality for species
** †Casea nicholsi – type locality for species
* †Caseoides – type locality for genus
** †Caseoides sanangeloensis – type locality for species
* †Caseopsis
** †Caseopsis agilis – type locality for species
* †Cassianoides – type locality for genus
** †Cassianoides kingorum – type locality for species
* †Cassiavellia – type locality for genus
** †Cassiavellia galtarae – type locality for species
* Fossil of the Ordovician-Silurian tabulate coral Catenipora †Catenipora
** †Catenipora workmanae – type locality for species
* †Catenispongia – type locality for genus
** †Catenispongia agaricus – type locality for species
* †Cathaysiopteris
** †Cathaysiopteris yochelsonii – type locality for species
* †Catoraphiceras
* †Cavellina
** †Cavellina ellipticalis – type locality for species
** †Cavellina nebrascensis
* Fossil of the Cambrian trilobite Cedaria †Cedaria
** †Cedaria gaspensis – or unidentified comparable form
* †Cenorhynchia – type locality for genus
** †Cenorhynchia atmeta
** †Cenorhynchia camerata
** †Cenorhynchia fracida – type locality for species
** †Cenorhynchia hebata
** †Cenorhynchia mitigata
** †Cenorhynchia nasuta
** †Cenorhynchia parvula – type locality for species
** †Cenorhynchia pentagonalis
** †Cenorhynchia saginata – type locality for species
** †Cenorhynchia transversa
** †Cenorhynchia triangulata – type locality for species
** †Cenorhynchia ventricosa
* †Centrotarphyceras
** †Centrotarphyceras longicameratum
* †Ceratobairdia – type locality for genus
** †Ceratobairdia dorsospinosa – type locality for species
* †Ceratopea
** †Ceratopea capuliformis
** †Ceratopea hami – or unidentified comparable form
** †Ceratopea incurvata
** †Ceratopea lemonei – type locality for species
** †Ceratopea unguis – or unidentified comparable form
* †Ceraunocochlis
** †Ceraunocochlis deformis – type locality for species
** †Ceraunocochlis elongata – type locality for species
** †Ceraunocochlis kidderi
** †Ceraunocochlis trekensis – type locality for species
* †Chaeniorhynchus – type locality for genus
** †Chaeniorhynchus inauris
** †Chaeniorhynchus salutare
** †Chaeniorhynchus transversum – type locality for species
* †Chaenomya – tentative report
* †Chaetetes
** †Chaetetes mackrothii – tentative report
* Chancelloria †Chancelloria – tentative report
* †Chauliochiton – type locality for genus
** †Chauliochiton knighti – type locality for species
* †Chaunactis
* †Cheiropyge
** †Cheiropyge koizumii – or unidentified comparable form
* †Chelononia
** †Chelononia neali
** †Chelononia straminea – type locality for species
* †Chiastocolumnia – type locality for genus
** †Chiastocolumnia cylindrica – type locality for species
* †Choanodus – type locality for genus
** †Choanodus anomalus
** †Choanodus irregularis – type locality for species
** †Choanodus perfectus – type locality for species
* †Choctawites
** †Choctawites choctawensis
** †Choctawites cumminsi
* †Chondronia – type locality for genus
** †Chondronia bella – type locality for species
** †Chondronia ningula – type locality for species
** †Chondronia obesa
** †Chondronia ovalis – type locality for species
** †Chondronia parva
** †Chondronia rectimarginata
* †Chonetella
** †Chonetella flemingi
* †Chonetes
** †Chonetes flemingi – tentative report
** †Chonetes permianus
** †Chonetes verneuilianus
* †Chonetinella
** †Chonetinella biplicata
** †Chonetinella ciboloensis
** †Chonetinella crassiparva
** †Chonetinella gerontica
** †Chonetinella parva
** †Chonetinella spinolirata – type locality for species
* †Chonetinetes
** †Chonetinetes angustisulcatus
** †Chonetinetes reversus – type locality for species
** †Chonetinetes varians
* †Chonosteges
** †Chonosteges costellatus – type locality for species
** †Chonosteges limbatus
** †Chonosteges magnicostatus – type locality for species
** †Chonosteges matutinus
** †Chonosteges multicostatus
** †Chonosteges pulcher
** †Chonosteges variabilis – type locality for species
* †Cibecuia
** †Cibecuia gouldii – type locality for species
* †Cibolites – type locality for genus
** †Cibolites uddeni – type locality for species
* †Cibolocrinus – type locality for genus
** †Cibolocrinus erectus – type locality for species
** †Cibolocrinus typus – type locality for species
* †Cinclidonema – type locality for genus
** †Cinclidonema texanum – type locality for species
* †Cladopora – report made of unidentified related form or using admittedly obsolete nomenclature
** †Cladopora spinulata
** †Cladopora tubulata
* †Clarkoceras
** †Clarkoceras luthei – or unidentified related form
* †Clavallus
** †Clavallus spicaudina
* †Cleidophorus – report made of unidentified related form or using admittedly obsolete nomenclature
** †Cleidophorus delawarensis
* Fossilized shell of the Middle Devonian-Permian brachiopod Cleiothyridina †Cleiothyridina
** †Cleiothyridina mulsa
** †Cleiothyridina nana
** †Cleiothyridina pilularis
** †Cleiothyridina prouti – or unidentified comparable form
** †Cleiothyridina rara
** †Cleiothyridina rectimarginata – type locality for species
** †Cleiothyridina tenuilineata
* †Clelandoceras – tentative report
** †Clelandoceras rarum – type locality for species
* †Climacograptus
** †Climacograptus nevadensis
** †Climacograptus tubuliferus
* †Clinodomia
** †Clinodomia obstipa
* †Clinolobus
** †Clinolobus type locality for species – informal
* †Clinopistha – tentative report
** †Clinopistha levis – or unidentified comparable form
* †Clistoceras
* †Clitendoceras
* †Clonograptus
* †Cluthoceras
* †Coccoseris
** †Coccoseris astomata – type locality for species
* †Codonofusiella
** †Codonofusiella paradoxica
* †Coelocladia
** †Coelocladia spinosa
* †Coelocladiella – type locality for genus
** †Coelocladiella lissa
** †Coelocladiella philoconcha – type locality for species
* †Coelogasteroceras
** †Coelogasteroceras mexicanum
* †Coenocystis – type locality for genus
** †Coenocystis richardsoni – type locality for species
* †Coledium
** †Coledium altisulcatum – type locality for species
** †Coledium costatulum – type locality for species
** †Coledium evexum
** †Coledium undulatum
** †Coledium vadosulcatum – type locality for species
* †Collatipora – type locality for genus
** †Collatipora delicata
** †Collatipora discreta – type locality for species
** †Collatipora pyriformis
* †Collemataria – type locality for genus
** †Collemataria americana
** †Collemataria batilliformis
** †Collemataria elongata – type locality for species
** †Collemataria gregaria – type locality for species
** †Collemataria irregularis – type locality for species
** †Collemataria marshalli
** †Collemataria platys – type locality for species
** †Collemataria spatulata
* †Collumatus
** †Collumatus solitarius
* †Colospongia
** †Colospongia americana
** †Colospongia benjamini
* †Colospongiella – type locality for genus
** †Colospongiella permiana – type locality for species
* †Colpites
** †Colpites minutus
** †Colpites monilifera
** †Colpites striata
* †Comia
* †Complexisporites – type locality for genus
** †Complexisporites polymorphus – type locality for species
* Fossilized shell of the Late Devonian-Permian brachiopod Composita †Composita
** †Composita affinis
** †Composita apheles – type locality for species
** †Composita apsidata
** †Composita bucculenta – type locality for species
** †Composita costata
** †Composita cracens
** †Composita crassa – type locality for species
** †Composita discina
** †Composita emarginata
** †Composita enormis – type locality for species
** †Composita imbricata – type locality for species
** †Composita mexicana
** †Composita mira
** †Composita nucella
** †Composita ovata
** †Composita parasulcata – type locality for species
** †Composita persinuata
** †Composita pilula
** †Composita prospera
** †Composita pyriformis
** †Composita quantilla
** †Composita stalagmium
** †Composita strongyle – type locality for species
** †Composita subcircularis
** †Composita subtilita
* †Compressoproductus
** †Compressoproductus acuminatus
** †Compressoproductus concentricus
** †Compressoproductus curtus – type locality for species
** †Compressoproductus flabellatus
** †Compressoproductus parvus
** †Compressoproductus pinniformis
** †Compressoproductus rarus – type locality for species
** †Compressoproductus thomasi – type locality for species
* †Condrathyris
** †Condrathyris perplexa
* †Conjunctio
* †Conocardium – tentative report
* †Conocerina
** †Conocerina brevis – or unidentified comparable form
** †Conocerina unguloides – type locality for species
* †Cooleyella
** †Cooleyella amazonensis
** †Cooleyella duffini – type locality for species
* †Cooperaria – type locality for genus
** †Cooperaria getawayensis – type locality for species
* †Coopericus
** †Coopericus angustus – type locality for species
** †Coopericus semisulcatus
** †Coopericus undatus
* †Cooperina
** †Cooperina inexpectata
** †Cooperina parva – type locality for species
** †Cooperina subcuneata
** †Cooperina triangulata
* †Cooperoceras – type locality for genus
** †Cooperoceras texanum – type locality for species
* †Coosella
** †Coosella beltensis
** †Coosella granulosa
** †Coosella widnerensis – or unidentified comparable form
* †Coosia
** †Coosia pernamagna
* Fossilized foliage of the Carboniferous-Permian conifer relative Cordaites †Cordaites
** †Cordaites principalis
* †Coronakirkbya – type locality for genus
** †Coronakirkbya fimbriata – type locality for species
* †Coryellina
** †Coryellina indicata – type locality for species
* †Coryssochiton – type locality for genus
** †Coryssochiton parallelus – type locality for species
* †Coscinophora – type locality for genus
** †Coscinophora hortoni
** †Coscinophora magnifica – type locality for species
** †Coscinophora monilifera – type locality for species
** †Coscinophora nodosa – type locality for species
* †Costatumulus
** †Costatumulus distortus
** †Costatumulus expansa – type locality for species
** †Costatumulus fragosa
** †Costatumulus villiersi
* †Costellarina – type locality for genus
** †Costellarina costellata – type locality for species
* †Costiferina
** †Costiferina indica
* †Costispinifera
** †Costispinifera costata – type locality for species
** †Costispinifera rugatula
** †Costispinifera walcottiana
* †Cotteroceras
* Life restoration of the Permian synapsid (mammal precursor) Cotylorhynchus †Cotylorhynchus
** †Cotylorhynchus hancocki – type locality for species
* †Cranaena
** †Cranaena dorsisulcata – type locality for species
** †Cranaena hannibalensis – or unidentified comparable form
** †Cranaena texana – type locality for species
* Crania
** †Crania permiana – type locality for species
* †Craspedona
** †Craspedona limbata – type locality for species
** †Craspedona newelli
* †Crassumbo – type locality for genus
** †Crassumbo inornatus – type locality for species
** †Crassumbo turgidus – type locality for species
* †Cravenoceras – tentative report
* †Crenispirifer
** †Crenispirifer angulatus – type locality for species
** †Crenispirifer effrenus
** †Crenispirifer jubatus
** †Crenispirifer myllus
** †Crenispirifer sagus
* †Crenulites – type locality for genus
** †Crenulites duncanae – type locality for species
** †Crenulites magnus – type locality for species
* Illustration of a fossilized skull and ventral scutes of the Carboniferous-Permian reptile relative Cricotus. Edward Drinker Cope (1884). †Cricotus
** †Cricotus crassidiscus – type locality for species
* †Crimites
** †Crimites glomulus – tentative report
** †Crimites type locality for species – informal
* †Cromyocrinus
** †Cromyocrinus grandis – or unidentified comparable form
* †Crossotelos
** †Crossotelos annulatus
* †Cruricella
** †Cruricella minutalis – type locality for species
* †Crurithyris
** †Crurithyris inflata
** †Crurithyris longirostris
** †Crurithyris major
** †Crurithyris parva
** †Crurithyris planoconvexa
** †Crurithyris sulcata
* †Cryptacanthia
** †Cryptacanthia glabra
* †Ctenacanthus
** †Ctenacanthus amblyxiphias – type locality for species
* †Ctenalosia – type locality for genus
** †Ctenalosia fixata – type locality for species
** †Ctenalosia primitiva
** †Ctenalosia rotunda
* †Ctenoptychius
* †Ctenospondylus – type locality for genus
** †Ctenospondylus casei – type locality for species
* †Cullisonia
** †Cullisonia producta
* †Culmitzschia
* †Culunama
** †Culunama bellistiata
* †Cuniculocystis – type locality for genus
** †Cuniculocystis floweri – type locality for species
* †Cupularostrum – tentative report
* †Cyathophylloides
** †Cyathophylloides burksae – type locality for species
* †Cycadospadix
* †Cyclacantharia
** †Cyclacantharia gigantea
** †Cyclacantharia kingorum – type locality for species
** †Cyclacantharia paucispinosa – type locality for species
** †Cyclacantharia robusta
** †Cyclacantharia transitoria – type locality for species
* †Cyclites
** †Cyclites costatus – type locality for species
** †Cyclites multilineata – type locality for species
* †Cyclobathmus
** †Cyclobathmus haworthi
* †Cylicioscapha
** †Cylicioscapha texana – type locality for species
** †Cylicioscapha williamsi – type locality for species
* †Cylindritopsis
** †Cylindritopsis hamiltonae – type locality for species
** †Cylindritopsis insolitus
** †Cylindritopsis spheroides – type locality for species
** †Cylindritopsis vaningeni
* †Cymatospira
** †Cymatospira montfortianus
* †Cyphotalosia – type locality for genus
** †Cyphotalosia masonensis – type locality for species
* †Cypricardinia – tentative report
** †Cypricardinia contracta – type locality for species
* †Cyptendoceras
** †Cyptendoceras richardsoni – type locality for species
* †Cyrtina
** †Cyrtina burlingtonensis
* †Cyrtorostra
** †Cyrtorostra varicostata
* †Cystothalamia – type locality for genus
** †Cystothalamia guadalupensis – type locality for species
** †Cystothalamia megacysta
** †Cystothalamia nodulifera

## D

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Dactylites
** †Dactylites magna – type locality for species
** †Dactylites micropora – type locality for species
** †Dactylites obconica – type locality for species
** †Dactylites subdigitatus – type locality for species
* Fossil of the Carboniferous-Late Cretaceous petrified conifer wood morphogenus Dadoxylon †Dadoxylon
* †Daharella
** †Daharella crassa – type locality for species
** †Daharella pattersonia – type locality for species
** †Daharella ramosa
* †Daixites
** †Daixites meglitskyi – or unidentified comparable form
* †Dakeoceras – tentative report
** †Dakeoceras mutabile – type locality for species
* †Danaeites
* †Dapsilodus
** †Dapsilodus obliquicostatus
** †Dapsilodus praecipuus
** †Dapsilodus sparsus
* †Daraelites
** †Daraelites leonardensis – type locality for species
* Restoration of the Permian amphibian Dasyceps †Dasyceps
** †Dasyceps microphthalmus – type locality for species
* †Dasysaria
** †Dasysaria inca
** †Dasysaria undulata
** †Dasysaria wolfcampensis – type locality for species
* †Dateroceras
* †Daubreeia
* †Decoriconus
** †Decoriconus fragilis
* †Defordia
** †Defordia defuncta
** †Defordia densa – type locality for species
** †Defordia lobata
* †Deiracephalus
** †Deiracephalus aster
* †Delaria
** †Delaria antiqua
** †Delaria brevis – type locality for species
** †Delaria chinatiensis – type locality for species
** †Delaria granti – type locality for species
** †Delaria westexensis – type locality for species
* †Delnortea
** †Delnortea abbotiae
** †Delnortea abbottiae
* †Delocrinus
** †Delocrinus hemisphericus
** †Delocrinus pictus
** †Delocrinus subhemisphericus
* †Deltarina
** †Deltarina magnicostata
* †Deltopecten
* †Demarezites
* †Dendropupa
** †Dendropupa vetusta
* †Densonella
* Dentalium
* †Derbyia
** †Derbyia bella
** †Derbyia bennetti – or unidentified comparable form
** †Derbyia buchi
** †Derbyia carteri
** †Derbyia cincinnata – type locality for species
** †Derbyia ciscoensis – tentative report
** †Derbyia complicata – type locality for species
** †Derbyia crassa
** †Derbyia crenulata
** †Derbyia cymbula
** †Derbyia elevata
** †Derbyia filosa – type locality for species
** †Derbyia informis – type locality for species
** †Derbyia laqueata – type locality for species
** †Derbyia multistriata – tentative report
** †Derbyia nasuta
** †Derbyia pannucia – type locality for species
** †Derbyia profunda
** †Derbyia scitula
** †Derbyia strophomenoidea
** †Derbyia sulcata
** †Derbyia texta – type locality for species
** †Derbyia wabaunseensis – tentative report
* †Derbyoides
** †Derbyoides dunbari
** †Derbyoides marathonensis
* †Dermospheroidalis – type locality for genus
** †Dermospheroidalis irregularis – type locality for species
* †Desmoinsea
* †Diaboloceras
** †Diaboloceras varicostatum
* Life restoration of the Permian reptile relative Diadectes †Diadectes – type locality for genus
** †Diadectes sideropelicus – type locality for species
** †Diadectes tenuitectes – type locality for species
* †Diaphelasma
** †Diaphelasma oklahomense
* †Dibunophyllum
** †Dibunophyllum moorei
** †Dibunophyllum uddeni – type locality for species
* †Dicellograptus
** †Dicellograptus ornatus
* †Diceromyonia
** †Diceromyonia crassa – type locality for species
* †Dichostasia
** †Dichostasia complex – type locality for species
** †Dichostasia simplex – type locality for species
* †Dicksonites
* †Dicranophyllum
* †Dictyoclostus
** †Dictyoclostus semireticulatus – tentative report
* †Dictyotomaria
** †Dictyotomaria euglyphea – type locality for species
** †Dictyotomaria scitula
** †Dictyotomaria type locality for species – informal
* †Didymodus
** †Didymodus platypternus
* †Dielasma
** †Dielasma adamanteum – type locality for species
** †Dielasma anterolatum
** †Dielasma bellulum
** †Dielasma bovidens
** †Dielasma compactum – type locality for species
** †Dielasma cordatum – type locality for species
** †Dielasma diabloense
** †Dielasma ellipsoideum – type locality for species
** †Dielasma emarginatum – type locality for species
** †Dielasma expansum – type locality for species
** †Dielasma gracile – type locality for species
** †Dielasma hessense
** †Dielasma labiatum
** †Dielasma ligonorum
** †Dielasma longisulcatum
** †Dielasma microrhynchum
** †Dielasma obesum – type locality for species
** †Dielasma perplexum – type locality for species
** †Dielasma pictile
** †Dielasma planidorsatum – type locality for species
** †Dielasma prolongatum
** †Dielasma pygmaeum
** †Dielasma rigbyi
** †Dielasma shafterense – type locality for species
** †Dielasma spatulatum
** †Dielasma subcirculare
** †Dielasma subcylindricum
** †Dielasma sulcatum – type locality for species
** †Dielasma uniplicatum
** †Dielasma zebratum – type locality for species
* †Dielasmella
** †Dielasmella larga – type locality for species
* †Diffingia – type locality for genus
** †Diffingia coita – type locality for species
** †Diffingia collecticia – type locality for species
** †Diffingia divisa – type locality for species
** †Diffingia largifica
** †Diffingia tortuosa – type locality for species
** †Diffingia valida – type locality for species
* †Dimacrodon – type locality for genus
** †Dimacrodon hottoni – type locality for species
* †Dimetrodon – type locality for genus
** †Dimetrodon angelensis – type locality for species
** †Dimetrodon booneorum – type locality for species
** †Dimetrodon dollovianus – type locality for species
** †Dimetrodon gigashomogenes – type locality for species
** †Dimetrodon grandis – type locality for species
** †Dimetrodon kempae – type locality for species
** †Dimetrodon limbatus – type locality for species
** †Dimetrodon loomisi – type locality for species
** †Dimetrodon macrospondylus – type locality for species
** †Dimetrodon milleri – type locality for species
** †Dimetrodon natalis – type locality for species
* †Dioonitocarpidium
* †Diplanus
** †Diplanus apochordus
** †Diplanus catatonus – type locality for species
** †Diplanus lamellatus – type locality for species
** †Diplanus rarus
** †Diplanus redactus
* Fossilized axial skeleton of the Carboniferous-Permian amphibian Diplocaulus †Diplocaulus – type locality for genus
** †Diplocaulus brevirostris – type locality for species
** †Diplocaulus copei – type locality for species
** †Diplocaulus magnicornis – type locality for species
** †Diplocaulus primus
** †Diplocaulus recurvatus – type locality for species
* †Diploconula
** †Diploconula biconvexa – type locality for species
* †Diplothmema
* †Diraphora
* †Discinites
* †Discotomaria
** †Discotomaria basisulcata – type locality for species
** †Discotomaria costata
** †Discotomaria dubia – type locality for species
** †Discotomaria nodosa – type locality for species
* †Discotropis – type locality for genus
** †Discotropis girtyi – type locality for species
** †Discotropis publicus
** †Discotropis sulcifer
* Fossilized partial skeleton of the Carboniferous amphibian Dissorophus †Dissorophus – type locality for genus
** †Dissorophus multicinctus – type locality for species
* †Ditomopyge
** †Ditomopyge decurtata
** †Ditomopyge scitula
* †Divaricosta
** †Divaricosta squarrosa – type locality for species
** †Divaricosta vagabunda
* †Djemelia – tentative report
* †Docoderma – type locality for genus
** †Docoderma papillosum – type locality for species
** †Docoderma rigida
* †Domatoceras
** †Domatoceras texanum – type locality for species
* †Donaldina
** †Donaldina gracilis – type locality for species
** †Donaldina knighti – type locality for species
** †Donaldina robusta
** †Donaldina stevensana
** †Donaldina type locality for species – informal
* †Donaldospira
** †Donaldospira nodosa – type locality for species
* †Donezella
* †Driveria – type locality for genus
** †Driveria ponderosa – type locality for species
* †Dunbarites
** †Dunbarites boardmani – type locality for species
** †Dunbarites rectilaterale
* †Durhamina
** †Durhamina cordillerensis – type locality for species
* †Dvorakia
** †Dvorakia philipi – tentative report
* †Dyoros
** †Dyoros angulatus – type locality for species
** †Dyoros attenuatus
** †Dyoros auriculatus
** †Dyoros complanatus
** †Dyoros concavus – type locality for species
** †Dyoros consanguineus – type locality for species
** †Dyoros convexus
** †Dyoros endospinus – type locality for species
** †Dyoros extensiformis – type locality for species
** †Dyoros extensus – type locality for species
** †Dyoros giganteus
** †Dyoros hillanus
** †Dyoros intrepidus
** †Dyoros lateralis
** †Dyoros magnus
** †Dyoros parvus – type locality for species
** †Dyoros planiextensus – type locality for species
** †Dyoros planus
** †Dyoros quadrangulatus – type locality for species
** †Dyoros rectangulatus – type locality for species
** †Dyoros robustus
** †Dyoros solidus – type locality for species
** †Dyoros strigosus – type locality for species
** †Dyoros subliratus
** †Dyoros subquadratus
** †Dyoros tenuis – type locality for species
** †Dyoros tetragonus
** †Dyoros transversus – type locality for species
** †Dyoros vagabundus – type locality for species
** †Dyoros vulgaris
** †Dyoros wordensis – type locality for species
* †Dysoristus
** †Dysoristus lochmanae

## E

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Echinaria
** †Echinaria moorei
** †Echinaria semipunctatus – tentative report
* †Echinauris
** †Echinauris bella – type locality for species
** †Echinauris boulei
** †Echinauris circularis
** †Echinauris crassa
** †Echinauris interrupta
** †Echinauris irregularis – type locality for species
** †Echinauris lappacea – type locality for species
** †Echinauris lateralis
** †Echinauris liumbona – type locality for species
** †Echinauris parva – type locality for species
** †Echinauris productelloides
** †Echinauris subquadrata – type locality for species
** †Echinauris venustula
* †Echinosteges
** †Echinosteges guadalupensis – type locality for species
** †Echinosteges tuberculatus – type locality for species
* †Economolopsis
** †Economolopsis anodontoides
* †Ectenoceras
* †Ectenolites
** †Ectenolites primus – type locality for species
* †Ectochoristites
** †Ectochoristites inflatus – type locality for species
* †Ectoposia – type locality for genus
** †Ectoposia grandis
** †Ectoposia wildei – type locality for species
* †Ectosteorachis
** †Ectosteorachis nitidus
* †Ectosterohachis
** †Ectosterohachis nitidus
* Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Edaphosaurus †Edaphosaurus – type locality for genus
** †Edaphosaurus boanerges
** †Edaphosaurus cruciger – or unidentified related form
** †Edaphosaurus microdus
** †Edaphosaurus pogonias – type locality for species
* †Edestus
** †Edestus minor
* †Edmondia
** †Edmondia bellula – type locality for species
** †Edmondia glabra
** †Edmondia rotunda – type locality for species
** †Edmondia suborbiculata – tentative report
* Life restoration of the Permian amphibian Edops †Edops
** †Edops craigi
* †Edriosteges – type locality for genus
** †Edriosteges beedei – type locality for species
** †Edriosteges compactus
** †Edriosteges medlicottianus
** †Edriosteges multispinosus – type locality for species
** †Edriosteges tenuispinosus – type locality for species
* †Eirlysia
** †Eirlysia exquisita – type locality for species
** †Eirlysia nodosa – type locality for species
** †Eirlysia reticulata
* †Elassonia
** †Elassonia micraria
** †Elassonia petila
** †Elassonia scitula
* †Elibatocrinus
* †Eliva
** †Eliva inflata
** †Eliva shumardi
* †Elivina
** †Elivina compacta – type locality for species
** †Elivina detecta
** †Elivina sulcifer
* †Ellesmeroceras
* †Elliottella
** †Elliottella minima
** †Elliottella multicostata
** †Elliottella transversalis
** †Elliottella varicostata – type locality for species
* †Elliptechinus – type locality for genus
** †Elliptechinus kiwiaster – type locality for species
* †Elversella – type locality for genus
** †Elversella rugosa
* †Elyx – tentative report
* †Emilites
** †Emilites brownwoodi – type locality for species
** †Emilites incertum
** †Emilites incertus – type locality for species
* †Empedias
** †Empedias molaris
* †Enallosia
** †Enallosia rotundovata
* †Endelocrinus
** †Endelocrinus grafordensis
** †Endelocrinus tumidus
* Fossilized shells and restored appearances of the Middle-Late Ordovician nautiloid cephalopod Endoceras †Endoceras
** †Endoceras baylorense
* †Endolobus
** †Endolobus renfroae – type locality for species
* †Endoplegma
** †Endoplegma calathus
* †Endothyra
* †Enteletes
** †Enteletes angulatus – type locality for species
** †Enteletes costellatus
** †Enteletes densus
** †Enteletes dumblei – type locality for species
** †Enteletes exiguus
** †Enteletes globosus – type locality for species
** †Enteletes hemiplicata
** †Enteletes leonardensis
** †Enteletes liumbonus – type locality for species
** †Enteletes plummeri – type locality for species
** †Enteletes rotundobesus – type locality for species
** †Enteletes stehlii – type locality for species
** †Enteletes subcircularis
** †Enteletes subnudus
** †Enteletes wolfcampensis
** †Enteletes wordensis
* †Eoasianites
** †Eoasianites smithwickensis
** †Eoasianites subhanieli
* †Eoastarte
** †Eoastarte subcircularis
* †Eocamptonectes
** †Eocamptonectes asperatus
** †Eocamptonectes papillatus
** †Eocamptonectes sculptilis
* Eocaudina
** †Eocaudina marginata
** †Eocaudina mccormacki
** †Eocaudina septaforaminalis
** †Eocaudina subhexagona
* †Eochonetes
** †Eochonetes magna – type locality for species
** †Eochonetes mucronata – type locality for species
* †Eolyttonia
** †Eolyttonia catilla
** †Eolyttonia chaotica – type locality for species
** †Eolyttonia circularis – type locality for species
** †Eolyttonia cornucopia
** †Eolyttonia diabloensis
** †Eolyttonia fredericksi – type locality for species
** †Eolyttonia gigantea – type locality for species
** †Eolyttonia parviconica
** †Eolyttonia phialiforma
** †Eolyttonia pocillata – type locality for species
** †Eolyttonia progressa – type locality for species
* †Eomartiniopsis
** †Eomartiniopsis girtyi
* †Eopteria
** †Eopteria richardsoni
* †Eoschistoceras – type locality for genus
** †Eoschistoceras strawnense – type locality for species
* †Eosyodon – type locality for genus
** †Eosyodon hudsoni – type locality for species
* †Eothalassoceras – tentative report
* †Eothinites
** †Eothinites hessensis – type locality for species
** †Eothinites planulatus
* Fossilized skull in multiple views of the Permian reptile Eothyris †Eothyris – type locality for genus
** †Eothyris parkeyi – type locality for species
* †Eotiaris
** †Eotiaris connorsi – type locality for species
** †Eotiaris guadalupensis – type locality for species
* †Eowellerites
** †Eowellerites moorei – type locality for species
* †Ephippioceras
** †Ephippioceras inexpectans – type locality for species
** †Ephippioceras moinellae
* †Epiactinotrypa
** †Epiactinotrypa sera – type locality for species
* †Epimastopora
* †Epiphyton
* †Epithalassoceras
** †Epithalassoceras type locality for species – informal
* †Eridmatus
** †Eridmatus marathonensis – type locality for species
** †Eridmatus texanus
* †Erisocrinus
** †Erisocrinus propinquus – type locality for species
** †Erisocrinus trinodus – type locality for species
* †Ernestiodendron
* Life restoration of the Carboniferous-Permian amphibian Eryops †Eryops – type locality for genus
** †Eryops anatinus – type locality for species
** †Eryops kayi – type locality for species
** †Eryops megacephalus – type locality for species
* †Estheria
* †Etheridgella
** †Etheridgella porosa – type locality for species
* †Etoblattina
** †Etoblattina robusta – type locality for species
** †Etoblattina texana – type locality for species
* †Euchondria
** †Euchondria cooperi – type locality for species
* †Euconia – type locality for genus
** †Euconia conicus
** †Euconia etna
** †Euconia umbilicata
* †Euconospira
** †Euconospira obsoleta – type locality for species
** †Euconospira pulchra – type locality for species
** †Euconospira spiroperforata – type locality for species
** †Euconospira varizona
* †Eugonophyllum
** †Eugonophyllum huecoensis
** †Eugonophyllum johnsonii
* †Eumedlicottia
** †Eumedlicottia burckhardti – type locality for species
** †Eumedlicottia whitneyi – type locality for species
* †Eumorphoceras
** †Eumorphoceras bisulcatum
* Fossilized shell of the Silurian-Permian sea snail Euomphalus †Euomphalus
** †Euomphalus cornudanus – type locality for species
** †Euomphalus glabribasis
** †Euomphalus kaibabensis
** †Euomphalus levicarinatus – type locality for species
** †Euomphalus pernodosus
* †Euonychocrinus
** †Euonychocrinus subservire – type locality for species
* †Euphemites
** †Euphemites aequisulcatus
** †Euphemites batteni – type locality for species
** †Euphemites blaneyanus
** †Euphemites circumcostatus
** †Euphemites crenulatus – type locality for species
** †Euphemites exquisitus – type locality for species
** †Euphemites imperator – type locality for species
** †Euphemites kingi – type locality for species
** †Euphemites luxuriosus – type locality for species
** †Euphemites nodocarinatus
** †Euphemites sparciliratus – type locality for species
** †Euphemites vittatus
* †Euphemitopsis
** †Euphemitopsis multinodosa – type locality for species
** †Euphemitopsis paucinodosus
* †Eupleuroceras
** †Eupleuroceras bellulum
* †Eurylepidoides – type locality for genus
** †Eurylepidoides socialis – type locality for species
* †Euryodus – type locality for genus
** †Euryodus primus – type locality for species
* †Euryphyllum – tentative report
** †Euryphyllum profundum – type locality for species
** †Euryphyllum robustum – type locality for species
* †Evolsonia
* †Exaulipora
** †Exaulipora permica
* †Exovasa – type locality for genus
** †Exovasa cystauletoides – type locality for species

## F

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Falsiamplexus – type locality for genus
** †Falsiamplexus delicata
** †Falsiamplexus elongatus – type locality for species
** †Falsiamplexus flexibilis – type locality for species
** †Falsiamplexus reductus – type locality for species
* †Fascicosta
** †Fascicosta bella
** †Fascicosta elongata
** †Fascicosta longaeva
* †Fayettevillea
* †Fenestella
** †Fenestella amplia
** †Fenestella archimediformis
** †Fenestella capitanensis
** †Fenestella firmior
** †Fenestella girtyi
** †Fenestella guadalupensis – type locality for species
** †Fenestella hilli
** †Fenestella popeana
** †Fenestella schucherti – or unidentified comparable form
** †Fenestella spinulifera
** †Fenestella texana – type locality for species
* †Fenestrellina
* †Ferganispira
** †Ferganispira acteonina – type locality for species
* †Fimbrinia
** †Fimbrinia cristatotuberculata
** †Fimbrinia ovata
** †Fimbrinia plummeri
* †Finkelnburgia
** †Finkelnburgia crassicostellata – or unidentified comparable form
** †Finkelnburgia cullisonia – or unidentified comparable form
* †Fissispongia
** †Fissispongia jacksboroensis
* †Fistulipora
** †Fistulipora guadalupae – type locality for species
** †Fistulipora guadalupensis
* †Flexuospiculata – type locality for genus
** †Flexuospiculata hexactina – type locality for species
* †Foordiceras
** †Foordiceras mammiferum – type locality for species
** †Foordiceras ornatissimum – type locality for species
* †Fransonia
** †Fransonia wyomingensis
* †Fusella
** †Fusella llanoensis – type locality for species
* †Fusiella
* Assemblage of fossils of Silurian-Permian fusulinid foraminiferans †Fusulina – report made of unidentified related form or using admittedly obsolete nomenclature
** †Fusulina elongata – type locality for species

## G

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Gasconadia
** †Gasconadia putilla
* †Gastrioceras
** †Gastrioceras montgomeryense
** †Gastrioceras occidentale
* †Geinitzina
* †Genevievella
** †Genevievella spinox
* †Geniculifera
** †Geniculifera brevicula – type locality for species
* †Geragnostus
* Life restoration of the Permian frog precursor Gerobatrachus †Gerobatrachus – type locality for genus
** †Gerobatrachus hottoni – type locality for species
* †Gervillia – report made of unidentified related form or using admittedly obsolete nomenclature
** †Gervillia longa
* †Geyerella
** †Geyerella americana – type locality for species
** †Geyerella hessi – type locality for species
** †Geyerella inexpectata – type locality for species
** †Geyerella kingorum
* †Gigantonoclea
* †Gigantopteris
** †Gigantopteris americana
* †Girtycoelia
** †Girtycoelia typica
* †Girtyella
** †Girtyella cedarensis – or unidentified related form
* †Girtyoceras
** †Girtyoceras hamiltonense
** †Girtyoceras meslerianum
* †Girtyocoelia
** †Girtyocoelia beedei
* †Girtypecten
** †Girtypecten sublaqueatus
* †Girtypora
** †Girtypora constricta – type locality for species
** †Girtypora hillana – type locality for species
** †Girtypora ocellata
** †Girtypora terminalis
** †Girtypora vittata
* †Girtyporina
** †Girtyporina incrustans – type locality for species
* †Girtyspira
** †Girtyspira minuta
** †Girtyspira yodai – type locality for species
* †Girvanella
* †Glabrocingulum
** †Glabrocingulum alveozonum
** †Glabrocingulum coronatum
** †Glabrocingulum diablo
** †Glabrocingulum grayvillense
** †Glabrocingulum lupus
** †Glabrocingulum texanum – type locality for species
* †Glaphyrites
** †Glaphyrites angulatus
** †Glaphyrites anguloumbilicatus
** †Glaphyrites deciensis – type locality for species
** †Glaphyrites hyattianus
** †Glaphyrites kansasensis
** †Glaphyrites millsi
** †Glaphyrites modestus – type locality for species
** †Glaphyrites raymondi
** †Glaphyrites ruzencevi
** †Glaphyrites welleri
* †Glassoceras
** †Glassoceras normani – type locality for species
* †Glaucosaurus – type locality for genus
** †Glaucosaurus megalops – type locality for species
* Life restoration of the Carboniferous shark Glikmanius †Glikmanius
** †Glikmanius occidentalis
* †Globivalvulina
* †Glossothyropsis
** †Glossothyropsis carinata
** †Glossothyropsis cryptacanthoides
** †Glossothyropsis immatura
** †Glossothyropsis juvenis
** †Glossothyropsis polita
** †Glossothyropsis rectangulata – type locality for species
** †Glossothyropsis robusta
** †Glossothyropsis sinuata
** †Glossothyropsis superba – type locality for species
* †Gloverilima
** †Gloverilima pratti
* †Glyptagnostus
* †Glyptorthis
** †Glyptorthis maquoketensis
* †Glyptospira
** †Glyptospira cingulata – type locality for species
** †Glyptospira huecoensis – type locality for species
** †Glyptospira quadriserrata – type locality for species
** †Glyptospira tricostata
** †Glyptospira turrita
* †Glyptosteges
** †Glyptosteges angustus – type locality for species
** †Glyptosteges insculptus
** †Glyptosteges intricatus – type locality for species
** †Glyptosteges sulcatus
* †Glyptotomaria – type locality for genus
** †Glyptotomaria apiarium – type locality for species
** †Glyptotomaria marginata – type locality for species
** †Glyptotomaria pistra – type locality for species
* †Gnamptorhynchos
** †Gnamptorhynchos prayi
* Life restoration of the Permian lungfish Gnathorhiza †Gnathorhiza
** †Gnathorhiza dikeloda – type locality for species
** †Gnathorhiza serrata
* †Gomphostrobus
** †Gomphostrobus bifidus
* †Goniarina
** †Goniarina appeli – type locality for species
** †Goniarina diabloensis
** †Goniarina futilis
** †Goniarina magniextensa
** †Goniarina permiana
** †Goniarina pyelodes
** †Goniarina striata
* †Goniasma
** †Goniasma lasallense
* Fossilized shell of the Late Devonian-Late Triassic ammonoid cephalopod Goniatites †Goniatites
** †Goniatites eganensis
** †Goniatites multiliratus
* †Goniocephalus – type locality for genus
** †Goniocephalus willistoni – type locality for species
* †Goniocladia
** †Goniocladia americana
* †Gonioloboceras
** †Gonioloboceras bridgeportense – type locality for species
** †Gonioloboceras goniolobus
** †Gonioloboceras gracellenae
** †Gonioloboceras parrishi
** †Gonioloboceras welleri
* †Gorgodon – type locality for genus
** †Gorgodon minutus – type locality for species
* †Gosseletina
** †Gosseletina permiana – type locality for species
* †Grammatodon
** †Grammatodon politus
* †Grandaurispina
** †Grandaurispina bella – type locality for species
** †Grandaurispina belliformis
** †Grandaurispina crassa
** †Grandaurispina elongata
** †Grandaurispina gibbosa – type locality for species
** †Grandaurispina kingorum – type locality for species
** †Grandaurispina meekana
** †Grandaurispina rara
** †Grandaurispina rudis
** †Grandaurispina signata – type locality for species
** †Grandaurispina undulata
** †Grandaurispina vaga – type locality for species
* †Graphiocrinus
** †Graphiocrinus bridgeportensis – type locality for species
* Multiple views of a fossil of the Ordovician horn coral Grewingkia †Grewingkia
** †Grewingkia crassa
** †Grewingkia franklinensis
** †Grewingkia robusta
* †Griffithidella
** †Griffithidella alternata
** †Griffithidella doris
* †Gryphochiton
** †Gryphochiton girtyi – type locality for species
* †Guadalupelosia
** †Guadalupelosia inexpectans
* †Guadalupia
** †Guadalupia auricula – type locality for species
** †Guadalupia cupulosa – type locality for species
** †Guadalupia favosa – type locality for species
** †Guadalupia lepta – type locality for species
** †Guadalupia microcamera – type locality for species
** †Guadalupia minuta – type locality for species
** †Guadalupia ramescens – type locality for species
** †Guadalupia vasa – type locality for species
** †Guadalupia zitteliana
* †Guizhoupecten
** †Guizhoupecten cheni
* †Gypospirifer – type locality for genus
** †Gypospirifer anancites – type locality for species
** Fossilized shell of the Carboniferous-Permian brachiopod Gypospirifer condor †Gypospirifer condor
** †Gypospirifer infraplicus
** †Gypospirifer nelsoni

## H

* A
* B
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* E
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* G
* H
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* M
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* O
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* X
* Y
* Z
* †Hadropipetta
** †Hadropipetta ancora
* †Hamburgia
** †Hamburgia chappelensis – type locality for species
** †Hamburgia texana
* †Haplistion
** †Haplistion aeluroglossa – type locality for species
** †Haplistion megalochetus – type locality for species
** †Haplistion skinneri – or unidentified comparable form
* †Hayasakapecten
** †Hayasakapecten americanus
* †Healdia
** †Healdia unispinosa – type locality for species
** †Healdia vidriensis – type locality for species
* †Hebertella
** †Hebertella occidentalis
* †Hebetorthoceras
** †Hebetorthoceras brokenarrowense
* †Helicoconchus – type locality for genus
** †Helicoconchus elongatus – type locality for species
* Fossilized tooth whorl of the Carboniferous Chimaera relative Helicoprion †Helicoprion
** †Helicoprion davisii
* †Heliospongia
** †Heliospongia excavata
** †Heliospongia ramosa
** †Heliospongia vokesi
* †Helminthochiton
** †Helminthochiton simplex
* †Hemileurus
** †Hemileurus runcinatus
* †Hemiliroceras
** †Hemiliroceras reticulatum
* †Hemizyga
* Hercosestria †Hercosestria
** †Hercosestria cribrosa – type locality for species
** †Hercosestria hystricula
** †Hercosestria laevis
* †Hercosia
** †Hercosia delicata
** †Hercosia uddeni – type locality for species
* †Heritschioides
* †Hermosanema
** †Hermosanema carinatum – type locality for species
* †Hesperiella
** †Hesperiella permianus – type locality for species
** †Hesperiella wordensis
* †Heteralosia
** †Heteralosia hystricula – type locality for species
** †Heteralosia magnispina
** †Heteralosia paucispinosa
** †Heteralosia tenuispina
** †Heteralosia vidriensis
* †Heteraria
** †Heteraria blakemorei
* †Heterelasma
** †Heterelasma angulatum
** †Heterelasma concavum – type locality for species
** †Heterelasma contortum
** †Heterelasma geniculatum
** †Heterelasma gibbosum – type locality for species
** †Heterelasma glansfagea – type locality for species
** †Heterelasma lenticularia
** †Heterelasma magnum
** †Heterelasma pentagonum – type locality for species
** †Heterelasma quadratum
** †Heterelasma shumardianum
** †Heterelasma solidum – type locality for species
** †Heterelasma sulciplicatum
** †Heterelasma venustulum
* †Heteropecten
** †Heteropecten vanvleeti
* †Heteroschizodus – type locality for genus
** †Heteroschizodus macomoides – type locality for species
* †Hexirregularia – type locality for genus
** †Hexirregularia nana – type locality for species
* †Hiscobeccus – tentative report
** †Hiscobeccus capax
* †Hoffmannia – report made of unidentified related form or using admittedly obsolete nomenclature
** †Hoffmannia fisheri – type locality for species
* †Holcacephalus
** †Holcacephalus tenerus
* †Holosia – type locality for genus
** †Holosia ovalis – type locality for species
** †Holosia ovoidea
** †Holosia regularis
* †Holotricharina – type locality for genus
** †Holotricharina hirsuta – type locality for species
** †Holotricharina sparsa – type locality for species
* †Homagnostus
* †Hormotoma
** †Hormotoma moderata – type locality for species
* †Hustedia
** †Hustedia ampullacea – type locality for species
** †Hustedia bipartita
** †Hustedia catella – type locality for species
** †Hustedia cepacea
** †Hustedia citeria
** †Hustedia compressa
** †Hustedia connorsi – type locality for species
** †Hustedia consuta – type locality for species
** †Hustedia crepax
** †Hustedia culcitula
** †Hustedia cuneata – type locality for species
** †Hustedia decollatensis
** †Hustedia demissa
** †Hustedia glomerosa
** †Hustedia hapala
** †Hustedia hessensis – type locality for species
** †Hustedia huecoensis – type locality for species
** †Hustedia inconspicua
** †Hustedia lusca – type locality for species
** †Hustedia meekana
** †Hustedia mormoni
** †Hustedia mormonii
** †Hustedia narinosa
** †Hustedia opsia
** †Hustedia papillata – type locality for species
** †Hustedia pugilla – type locality for species
** †Hustedia pusilla
** †Hustedia rupinata
** †Hustedia samiata
** †Hustedia sculptilis – type locality for species
** †Hustedia spicata – type locality for species
** †Hustedia stataria
** †Hustedia texana
** †Hustedia tomea
** †Hustedia trisecta
** †Hustedia trita
* Restoration of two of the Permian-Late Cretaceous cartilaginous fish Hybodus †Hybodus
** †Hybodus copei – type locality for species
* †Hypergonia
** †Hypergonia percostata
* †Hypopsia
** †Hypopsia versuta
* †Hypselentoma
** †Hypselentoma ornata – type locality for species
* †Hypseloconus
* †Hypsiptycha
** †Hypsiptycha argenturbicum
** †Hypsiptycha neenah
* †Hystriculina
** †Hystriculina convexa
** †Hystriculina dugoutensis – type locality for species
** †Hystriculina minima
** †Hystriculina pumila
** †Hystriculina sulcata – type locality for species
** †Hystriculina ventroplana
** †Hystriculina wabashensis
* †Hystricurus

## I

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* B
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* D
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* G
* H
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* M
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* †Ianthinopsis
** †Ianthinopsis medialis
* †Icriodus
** †Icriodus eolatericrescens
** †Icriodus gravesi
* †Ideliopsis – type locality for genus
** †Ideliopsis ovalis – type locality for species
* †Illusioluidia – type locality for genus
** †Illusioluidia teneryi – type locality for species
* †Incisimura – type locality for genus
** †Incisimura bella – type locality for species
* †Incrustospongia – type locality for genus
** †Incrustospongia meandrica – type locality for species
* †Institella
** †Institella leonardensis – type locality for species
* †Insulipora
** †Insulipora elegans
* †Iotina
** †Iotina minuta
* †Isacrodus – type locality for genus
** †Isacrodus marthae – type locality for species
* †Ischnoptygma
** †Ischnoptygma archibaldi – type locality for species
** †Ischnoptygma valentinei – type locality for species
* Life restoration of the Permian amphibian Isodectes †Isodectes
** †Isodectes obtusus – type locality for species
* †Isogramma
** †Isogramma concavum
** †Isogramma diabloense
** †Isogramma lobatum
** †Isogramma millepunctata
** †Isogramma vidriense
* †Isotrypa
* †Ivanovia

## J

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Restoration of the Carboniferous-Permian ray-like cartilaginous fish Janassa (top and left) †Janassa
* †Jeffersonia
** †Jeffersonia granosa
* †Jereina – type locality for genus
** †Jereina cylindrica – type locality for species
** †Jereina ramosa – type locality for species
* †Jinogondolella
** †Jinogondolella aserrata
** †Jinogondolella gladirobusta
** †Jinogondolella nankingensis
** †Jinogondolella postserrata
* †Juresania
* †Juresanites
** †Juresanites colemanensis – type locality for species

## K

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Kahneria – type locality for genus
** †Kahneria seltina – type locality for species
* †Kaibabella
** †Kaibabella basilica
* †Kalodomia
** †Kalodomia rugosa
* †Kargalites
** †Kargalites subquadratum
** †Kargalites subquadratus – type locality for species
** †Kargalites type locality for species – informal
* †Kaskia
** †Kaskia rarus
* †Kellettina
** †Kellettina vidriensis – type locality for species
* †Kindlella – type locality for genus
** †Kindlella centrinoda – type locality for species
** †Kindlella fissiloba – type locality for species
* †Kingopora – tentative report
* †Kingstonia
** †Kingstonia pontotocensis
* †Kinsabia
** †Kinsabia variegata
* †Kirkbya
* †Knightina – tentative report
** †Knightina cuestaforma – type locality for species
** †Knightina macknighti – type locality for species
* †Knightites
** †Knightites maximus – type locality for species
** †Knightites medius – type locality for species
* †Knightoceras
** †Knightoceras kempae – type locality for species
* †Knoxosaurus – type locality for genus
** †Knoxosaurus niteckii – type locality for species
* †Kochiproductus
** †Kochiproductus elongatus
** †Kochiproductus occidentalis – type locality for species
** †Kochiproductus peruvianus
** †Kochiproductus primitivus – type locality for species
** †Kochiproductus quadratus
** †Kochiproductus victorioensis – type locality for species
* †Kockelella
** †Kockelella ortus
* †Komia
* †Komiella – report made of unidentified related form or using admittedly obsolete nomenclature
** †Komiella ostiolata
* †Kormagnostus
** †Kormagnostus seclusus
* †Kozlowskia
** †Kozlowskia alata
** †Kozlowskia anterosulcata
** †Kozlowskia capaci
** †Kozlowskia kingi
** †Kozlowskia nasuta
** †Kozlowskia splendens
** †Kozlowskia subsphaeroidalis
* †Kutorginella
** †Kutorginella dartoni – type locality for species
** †Kutorginella lasallensis
** †Kutorginella robusta
** †Kutorginella sullivanensis
** †Kutorginella uddeni
** †Kutorginella umbonata

## L

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Labidosaurikos
** †Labidosaurikos meachami – type locality for species
* Life restoration of the Permian reptile Labidosaurus †Labidosaurus
** †Labidosaurus barkeri
** †Labidosaurus hamatus – type locality for species
* †Labridens
** †Labridens shupei
* †Lacunospira
** †Lacunospira alta – type locality for species
** †Lacunospira altsia
** †Lacunospira lirata – type locality for species
* †Lamarodus – type locality for genus
** †Lamarodus triangulus – type locality for species
* †Lambeoceras
** †Lambeoceras rotundum
* †Lamellosia
** †Lamellosia lamellosa
* †Lamellospira
** †Lamellospira cincta – type locality for species
** †Lamellospira conica
** †Lamellospira spinosa – type locality for species
* †Langepis – type locality for genus
** †Langepis campbelli
* †Laudonocrinus
** †Laudonocrinus subsinuatus
* †Lawnia – type locality for genus
** †Lawnia taylorensis – type locality for species
* †Lebachia
* †Lecanospira – type locality for genus
** †Lecanospira lecanospiroides – type locality for species
** †Lecanospira sanctisabae
* †Lecythiocrinus
* †Leella
** †Leella bellula – or unidentified comparable form
* †Leioclema
** †Leioclema dozierense – type locality for species
** †Leioclema shumardi
* †Leiorhynchoidea
** †Leiorhynchoidea amygdaloidea – type locality for species
** †Leiorhynchoidea rotundidorsa
** †Leiorhynchoidea scelesta
** †Leiorhynchoidea sublamellosa
** †Leiorhynchoidea sulcata
* †Leiorhynchus
** †Leiorhynchus bisulcatum
** †Leiorhynchus nobilis
* †Leiostegium
* †Lekiskochiton – type locality for genus
** †Lekiskochiton fornicis – type locality for species
* †Lemonea
** †Lemonea cylindrica
** †Lemonea digitata – type locality for species
** †Lemonea simplex – type locality for species
* †Leonardophyllum
** †Leonardophyllum kingi – type locality for species
* †Lepetopsis
** †Lepetopsis capitanensis – type locality for species
** †Lepetopsis haworthi – type locality for species
* †Lepidocrania – type locality for genus
** †Lepidocrania sparsispinosa – type locality for species
** †Lepidocrania sublamellosa
** †Lepidocrania tardispinosa – type locality for species
* †Lepidocyclus
** †Lepidocyclus laddi
** †Lepidocyclus manniensis
* †Lepidophyllum
* †Lepidospirifer
** †Lepidospirifer angulatus – type locality for species
** †Lepidospirifer costellus – type locality for species
** †Lepidospirifer demissus – type locality for species
** †Lepidospirifer inferus
* †Leptagonia
* †Leptalosia
** †Leptalosia ovalis
* †Leptodesma
** †Leptodesma falcata
** †Leptodesma gouldii
** †Leptodesma guadalupensis
* †Leptodus
** †Leptodus americana
** †Leptodus guadalupensis – type locality for species
* †Leptomphalus
** †Leptomphalus micidus – type locality for species
* †Leptoplastides
* †Leptoptygma
** †Leptoptygma subtilistriatum
* †Leptotygria
* †Lercaritubus
** †Lercaritubus problematicus
* †Lesueurilla
* †Leurosina – type locality for genus
** †Leurosina delicata
** †Leurosina lata – type locality for species
** †Leurosina marginata
** †Leurosina serratoseptata
** †Leurosina sinesulca
** †Leurosina vulgarica
* Life restoration of the Early Ordovician nautiloid cephalopod Levisoceras †Levisoceras
** †Levisoceras contractum – type locality for species
* †Levizygopleura
** †Levizygopleura williamsi
* †Lichenaria
* †Limatulina – report made of unidentified related form or using admittedly obsolete nomenclature
** †Limatulina striaticostata – type locality for species
* †Limbella
** †Limbella costata
** †Limbella costellata
** †Limbella limbata – type locality for species
** †Limbella victorioensis
** †Limbella wolfcampensis – type locality for species
* †Lindostromella
** †Lindostromella patula
* †Lindstroemia – report made of unidentified related form or using admittedly obsolete nomenclature
** †Lindstroemia cylindrica – type locality for species
** †Lindstroemia permiana
* Lingula
* †Linipalus
** †Linipalus magnispinus
* †Linoproductus
** †Linoproductus cora
** †Linoproductus delicatus
** †Linoproductus meniscus
** †Linoproductus nasutus – type locality for species
** †Linoproductus phosphaticus
** †Linoproductus prattenianus
** †Linoproductus waagenianus
* †Liosotella
** †Liosotella costata – type locality for species
** †Liosotella irregularis – type locality for species
** †Liosotella opima – type locality for species
** †Liosotella parva – type locality for species
** †Liosotella popei – type locality for species
** †Liosotella rotunda
** †Liosotella spinumbona
** †Liosotella tetragonalis – type locality for species
** †Liosotella texana
** †Liosotella wordensis – type locality for species
* †Liraria
** †Liraria lirata
* †Lirellaria
** †Lirellaria costellata
** †Lirellaria crassa
** †Lirellaria diabloensis
* †Liroceras
** †Liroceras globulare
* †Lissochonetes
** †Lissochonetes geinitzianus
** †Lissochonetes parvisulcatus
* †Lithostrotionella – tentative report
* †Llanoaspis
** †Llanoaspis virginica
* †Llanoceras – type locality for genus
** †Llanoceras gracile – type locality for species
* †Llanocystis – type locality for genus
** †Llanocystis wilbernsensis – type locality for species
* †Lobatannularia
* †Lophonema
* †Lophophyllidium
** †Lophophyllidium absitum – type locality for species
** †Lophophyllidium compressum
** †Lophophyllidium confertum – or unidentified comparable form
** †Lophophyllidium cyathaxoniaforme – type locality for species
** †Lophophyllidium distortum
** †Lophophyllidium dunbari
** †Lophophyllidium erugum – type locality for species
** †Lophophyllidium lanosum – type locality for species
** †Lophophyllidium magnocolumnare – type locality for species
** †Lophophyllidium plummeri – type locality for species
** †Lophophyllidium profundum
** †Lophophyllidium proliferum
** †Lophophyllidium radicosum
** †Lophophyllidium skinneri – type locality for species
** †Lophophyllidium texanum
** †Lophophyllidium vallum – type locality for species
** †Lophophyllidium vidriensis – type locality for species
** †Lophophyllidium westii
** †Lophophyllidium wewokanum
* †Lophotichium
** †Lophotichium dugoutense – type locality for species
** †Lophotichium rotundiseptum – type locality for species
** †Lophotichium simulatum – type locality for species
* †Lowenstamia – type locality for genus
** †Lowenstamia ampla
** †Lowenstamia texana – type locality for species
* †Loxonema – report made of unidentified related form or using admittedly obsolete nomenclature
** †Loxonema inconspicuum – type locality for species
* †Loxophragmus – type locality for genus
** †Loxophragmus ellipticus – type locality for species
* †Luederia – type locality for genus
** †Luederia kempi – type locality for species
* †Luterospongia – type locality for genus
** †Luterospongia texana – type locality for species
* †Lyroschizodus
** †Lyroschizodus oklahomensis
** †Lyroschizodus orbicularis – type locality for species
* Life restoration of the Permian snake-like amphibian Lysorophus showing speculative egg-coiling behavior †Lysorophus
** †Lysorophus tricarinatus
* †Lytvolasma
** †Lytvolasma aucta – type locality for species

## M

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Mackinneyella
** †Mackinneyella hinganensis – or unidentified related form
** †Mackinneyella praepluriformis – or unidentified comparable form
** †Mackinneyella robustiformis
* †Macluritella
** †Macluritella gyroceras
** †Macluritella uniangulata
* †Macrochilina – report made of unidentified related form or using admittedly obsolete nomenclature
** †Macrochilina modesta – type locality for species
* †Macrodontacanthus – type locality for genus
** †Macrodontacanthus kingi – type locality for species
* †Macroporella
** †Macroporella verticillata – type locality for species
* †Madarosia
** †Madarosia anterolamellata
** †Madarosia pentagona
* †Maeandrostia
** †Maeandrostia kansasensis
* †Manipora
** †Manipora amicarum
** †Manipora magna – type locality for species
** †Manipora trapezoidalis – type locality for species
* †Manzanospira
** †Manzanospira carinata
** †Manzanospira manzanicum
** †Manzanospira wordensis – type locality for species
* †Marathonites
** †Marathonites jpsmithi – type locality for species
** †Marathonites moorei – type locality for species
** †Marathonites vidriensis – type locality for species
* †Marginatia
* †Marginifera
** †Marginifera cristobalensis
** †Marginifera manzanica
** †Marginifera opima
** †Marginifera texana
* †Martinia
** †Martinia causaria
** †Martinia cruenta
** †Martinia exigua
** †Martinia fucina
** †Martinia miranda – type locality for species
** †Martinia nealranchensis
** †Martinia rhomboidalis
** †Martinia wolfcampensis – type locality for species
* †Mastersonia – type locality for genus
** †Mastersonia driverensis – type locality for species
* †Mckittrickella – type locality for genus
** †Mckittrickella pratti – type locality for species
* †Mcqueenoceras
* †Meandrostia
** †Meandrostia tortacloaca
* †Medlicottia
** †Medlicottia arroyoensis – type locality for species
** †Medlicottia chozaensis – type locality for species
** †Medlicottia copei – type locality for species
** †Medlicottia costellifera – type locality for species
** †Medlicottia kingorum – type locality for species
** †Medlicottia milleri – type locality for species
* †Meekella
** †Meekella angustiplicata
** †Meekella attenuata
** †Meekella calathica – type locality for species
** †Meekella caperata – type locality for species
** †Meekella circularis
** †Meekella enormis – type locality for species
** †Meekella hessensis – type locality for species
** †Meekella intermedia
** †Meekella magnifica – type locality for species
** †Meekella mexicana
** †Meekella multilirata – type locality for species
** †Meekella occidentalis – type locality for species
** †Meekella prionota – type locality for species
** †Meekella skenoides
** †Meekella striaticostata
** †Meekella striatocostata
** †Meekella texana – type locality for species
* †Meekopora
* †Meekospira
** †Meekospira choctawensis
** †Meekospira mimiae – type locality for species
** †Meekospira peracuta
* †Megactenopetalus
** †Megactenopetalus kaibabanus
* †Megousia
** †Megousia auriculata
** †Megousia definita – type locality for species
** †Megousia flexuosa
** †Megousia girtyi – type locality for species
** †Megousia mucronata
** †Megousia umbonata
** †Megousia waageniana – type locality for species
* †Merista
** †Merista maccullochensis – type locality for species
* †Mesolobus
* Fossilized shell of the Carboniferous-Permian nautiloid cephalopod Metacoceras †Metacoceras
** †Metacoceras baylorense – type locality for species
** †Metacoceras cheneyi – type locality for species
** †Metacoceras inconspicuum
* †Metacrimites
** †Metacrimites adamsi – type locality for species
** †Metacrimites defordi – type locality for species
** †Metacrimites marathonensis – type locality for species
** †Metacrimites newelli – type locality for species
* †Metaindocrinus
** †Metaindocrinus cooperi – type locality for species
* †Metalegoceras
** †Metalegoceras aricki – type locality for species
** †Metalegoceras baylorense – type locality for species
** †Metalegoceras schucherti – type locality for species
* †Metaperrinites
** †Metaperrinites cumminsi – type locality for species
** †Metaperrinites vicinus
* †Metapronorites
** †Metapronorites pseudotimorensis
* †Metarmosaurus – type locality for genus
** †Metarmosaurus fossatus – type locality for species
* Restoration of the Cambrian trilobite Meteoraspis †Meteoraspis
** †Meteoraspis metra
* †Metoptoma
** †Metoptoma texana – type locality for species
* †Metriolepis – type locality for genus
** †Metriolepis carotica
** †Metriolepis diabloensis
** †Metriolepis exserta
** †Metriolepis irenae
** †Metriolepis larina
** †Metriolepis nabis
** †Metriolepis pedicosa
** †Metriolepis pinea
** †Metriolepis pulvinata – type locality for species
** †Metriolepis scrupea
** †Metriolepis tegulata – type locality for species
** †Metriolepis ziczac – type locality for species
* †Mexicoceras
** †Mexicoceras guadalupense – type locality for species
* †Michelinoceras – tentative report
** †Michelinoceras guadalupense – type locality for species
* †Micraphelia
** †Micraphelia pumilis
** †Micraphelia scitula
** †Micraphelia subalata
* Life restoration of the Permian amphibian Micraroter †Micraroter – tentative report
** †Micraroter erythrogeios
* †Microantyx
** †Microantyx botoni
** †Microantyx mudgei
* †Microbaltoceras – type locality for genus
** †Microbaltoceras minore – type locality for species
* †Microdoma
** †Microdoma conicum
** †Microdoma gavinae
* †Microptychis
** †Microptychis insolita – type locality for species
* †Microstaura – type locality for genus
** †Microstaura doliolum
* †Microstaurella – type locality for genus
** †Microstaurella minima – type locality for species
** †Microstaurella parva – type locality for species
* †Millerella
** †Millerella marblensis
* †Millkoninckioceras
** †Millkoninckioceras bibbi
* †Miltonella – type locality for genus
** †Miltonella shupei – type locality for species
* †Minammodytes
* †Minilya
** †Minilya girtyi
* †Minispongia
** †Minispongia constricta – type locality for species
* †Mizzia
** †Mizzia velebitana
* †Monaxoradiata – type locality for genus
** †Monaxoradiata lamina – type locality for species
* †Monodiexodina
** †Monodiexodina bispatulata
** †Monodiexodina linearis – tentative report
* †Monophyllum
** †Monophyllum cassum – type locality for species
* †Monotis – tentative report
* †Moorefieldella
* †Mooreoceras
** †Mooreoceras giganteum – type locality for species
* †Mooreocrinus
** †Mooreocrinus magdalensis – type locality for species
* †Moreauoceras
** †Moreauoceras milleri
* †Morrowcrinus – tentative report
* †Mourlonia
* †Multistella – type locality for genus
** †Multistella porosa
* †Murchisonia
** †Murchisonia gouldi
* †Muriceras – type locality for genus
** †Muriceras anomalum – type locality for species
** †Muriceras curviseptatum – type locality for species
** †Muriceras gracile – type locality for species
** †Muriceras hebetum – type locality for species
** †Muriceras micromurus – type locality for species
** †Muriceras moderatum – type locality for species
** †Muriceras murus – type locality for species
* †Myalina
** †Myalina acutirostris – type locality for species
** †Myalina aviculoides
** †Myalina copei – type locality for species
** †Myalina lamellosa – type locality for species
** †Myalina permiana
** †Myalina plicata – type locality for species
** †Myalina pliopetina – type locality for species
** †Myalina recta – tentative report
** †Myalina squamosa – tentative report
** †Myalina wyomingensis – tentative report
* Life restoration of the Permian synapsid (mammal precursor) Mycterosaurus †Mycterosaurus – type locality for genus
** †Mycterosaurus longiceps – type locality for species
* †Myoconcha
** †Myoconcha costulata – type locality for species

## N

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Nabespecha
** †Nabespecha leonardia – type locality for species
* †Nanobamus – type locality for genus
** †Nanobamus macrorhinus – type locality for species
* †Nasocephalus
** †Nasocephalus flabellatus
** †Nasocephalus nasutus
* †Naticopsis
** †Naticopsis judithae
** †Naticopsis remex
** †Naticopsis shumardi – tentative report
** †Naticopsis transversa – type locality for species
* †Neilsonia
** †Neilsonia laticincta
* Neldasaurus †Neldasaurus
** †Neldasaurus wrightae
* †Nemejcopteris
* †Neoaganides
** †Neoaganides grahamensis
* †Neocalamites – or unidentified comparable form
* †Neochonetes
** †Neochonetes costellata – type locality for species
** †Neochonetes granulifer
** †Neochonetes liratus
** †Neochonetes magna
** †Neochonetes meekanus – tentative report
** †Neochonetes parvus
** †Neochonetes transversalis
** †Neochonetes victoriana – type locality for species
* †Neocrimites
** †Neocrimites defordi
** †Neocrimites type locality for species – informal
* †Neodimorphoceras
** †Neodimorphoceras lenticulare
** †Neodimorphoceras oklahomae
** †Neodimorphoceras plummerae – type locality for species
** †Neodimorphoceras texanum
* †Neogeoceras
** †Neogeoceras girtyi
* †Neoglyphioceras
** †Neoglyphioceras entogonum
* †Neoicoceras
* †Neokoninckophyllum
** †Neokoninckophyllum cooperi – type locality for species
** †Neokoninckophyllum deciensis – type locality for species
** †Neokoninckophyllum dunbari – type locality for species
* †Neophricadothyris
** †Neophricadothyris conara – type locality for species
** †Neophricadothyris crassibecca – type locality for species
** †Neophricadothyris transversa
* †Neopopanoceras
** †Neopopanoceras bowmani – type locality for species
* †Neopronorites
** †Neopronorites bakeri – type locality for species
** †Neopronorites boesei
* †Neoshumardites
** †Neoshumardites gaptankensis
* Fossilized shell of the Carboniferous-Permian brachiopod Neospirifer †Neospirifer
** †Neospirifer amphigyus – type locality for species
** †Neospirifer apothescelus – type locality for species
** †Neospirifer bakeri – type locality for species
** †Neospirifer cameratus – tentative report
** †Neospirifer formulosus
** †Neospirifer huecoensis – type locality for species
** †Neospirifer kansasensis
** †Neospirifer mansuetus
** †Neospirifer neali
** †Neospirifer notialis
** †Neospirifer placidus
** †Neospirifer t. – informal
** †Neospirifer triplicatus
** †Neospirifer venezuelensis
* †Neotryplasma
* †Neozeacrinus
** †Neozeacrinus uddeni – type locality for species
* Fronds of the Carboniferous seed fern Neuropteris †Neuropteris
** †Neuropteris cordata – tentative report
** †Neuropteris lindahli – or unidentified comparable form
* †Newellites
** †Newellites richardsoni – type locality for species
* †Newellospongia – type locality for genus
** †Newellospongia perforata – type locality for species
* †Nicollidina
** †Nicollidina remscheidensis
* †Nielsenoceras
** †Nielsenoceras skinneri – type locality for species
* †Niviconia – type locality for genus
** †Niviconia abrupta
** †Niviconia globosa
* †Norwoodia
** †Norwoodia quadrangularis
* †Nothopindax
** †Nothopindax egregius
* †Notothyris
** †Notothyris gillilandensis
** †Notothyris planiplicata
** †Notothyris venusta – type locality for species
* †Novaculapermia – type locality for genus
** †Novaculapermia boydi – type locality for species
* †Novlepatella
** †Novlepatella beedei – type locality for species
** †Novlepatella parrishi
** †Novlepatella patella – type locality for species
* †Novoameura
** †Novoameura vitrumons – type locality for species
* †Nucleospira
** †Nucleospira cunctata
* Interior of a fossilized shell of the Early Ordovician-modern marine bivalve Nucula Nucula – report made of unidentified related form or using admittedly obsolete nomenclature
* Nuculana
* †Nuculavus
** †Nuculavus levatiformis
** †Nuculavus okawensis – or unidentified related form
* †Nuculopsis
** †Nuculopsis girtyi
* †Nudauris
** †Nudauris convexa
** †Nudauris diabloensis
** †Nudauris enigmatica – type locality for species
** †Nudauris linospina – type locality for species
** †Nudauris reticulata – type locality for species
** †Nudauris splendens – type locality for species
** †Nudauris transversa
** †Nudauris tribulosa
** †Nudauris whitei
* †Nuia
** †Nuia siberica
* †Nybyoceras
** †Nybyoceras montoyense
* †Nyctopora
** †Nyctopora mutabilis – type locality for species
** †Nyctopora nondescripta – type locality for species

## O

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Obliquipecten
** †Obliquipecten granti
* †Ochmazochiton – type locality for genus
** †Ochmazochiton comptus – type locality for species
* †Odonopteris
* †Odontopteris
** †Odontopteris conferta
** †Odontopteris fischeri
** †Odontopteris genuina
** †Odontopteris neuropteroides
** †Odontopteris osmundaeformis – or unidentified comparable form
* †Oistodus
* †Oldhamina – tentative report
* †Olenus
* †Oligorthis
** †Oligorthis arbucklensis
* †Ombonia
** †Ombonia guadalupensis
** †Ombonia invecta
* †Omphalotrochus
** †Omphalotrochus alleni – type locality for species
** †Omphalotrochus cochisensis – type locality for species
** †Omphalotrochus hessensis – type locality for species
** †Omphalotrochus obtusispira – type locality for species
** †Omphalotrochus spinosus – type locality for species
** †Omphalotrochus wolfcampensis – type locality for species
* †Oncosarina
** †Oncosarina rotunda
** †Oncosarina spinicostata – type locality for species
** †Oncosarina whitei
* †Oneotoceras
* †Onniella
** †Onniella plicata – type locality for species
** †Onniella quadrata
* †Onychochilus
* Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Ophiacodon †Ophiacodon – type locality for genus
** †Ophiacodon major – type locality for species
** †Ophiacodon retroversus – type locality for species
** †Ophiacodon uniformis – type locality for species
* †Ophileta
** †Ophileta polygyratus
** †Ophileta rotuliformis
* †Opisthotreta
** †Opisthotreta depressa
* †Orbicoelia
** †Orbicoelia guadalupensis
** †Orbicoelia inflata
** †Orbicoelia tholiaphor – type locality for species
** †Orbicoelia tumibilis
* †Orbiculoidea
** †Orbiculoidea missouriensis
* †Ormoceras
** †Ormoceras dartoni
* Restoration of the Carboniferous-Permian cartilaginous fish Orodus †Orodus
** †Orodus corrugatus – type locality for species
* †Orospira
* †Orthacanthus
** †Orthacanthus compressus
** †Orthacanthus texensis
* †Orthisina – report made of unidentified related form or using admittedly obsolete nomenclature
* †Orthoceracone
* †Orthograptus
** †Orthograptus fastigatus
** †Orthograptus quadrimucronatus
** †Orthograptus thorsteinssoni
* †Orthomyalina
** †Orthomyalina subquadrata
* †Orthonema
** †Orthonema paedice – type locality for species
** †Orthonema paxillus – type locality for species
** †Orthonema salteri
** †Orthonema striatonodosum
** †Orthonema telescopiforme – type locality for species
* †Orthonychia
** †Orthonychia bowsheri – type locality for species
* †Orthotetella
** †Orthotetella wolfcampensis – type locality for species
* †Orthotetes
** †Orthotetes mutabilis – or unidentified comparable form
* †Orthothetina
* †Orthotichia
** †Orthotichia hueconiana – type locality for species
** †Orthotichia irregularis
** †Orthotichia kozlowskii – type locality for species
** †Orthotichia newelli – type locality for species
* †Ossimimus – type locality for genus
** †Ossimimus robustus
* †Ostodolepis – type locality for genus
** †Ostodolepis brevispinatus – type locality for species
* †Oulodus
** †Oulodus cristagalli – tentative report
* †Ovatia
* †Oxyprora
** †Oxyprora capitanensis – type locality for species
** †Oxyprora missouriensis
* †Ozarkina
** †Ozarkina typica
* †Ozarkodina
** †Ozarkodina bohemica
** †Ozarkodina wurmi – tentative report
* †Ozawainella – tentative report
** †Ozawainella inflata – type locality for species

## P

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Pachylyroceras
** †Pachylyroceras cloudi
** †Pachylyroceras newsomi
* †Padgettia
** †Padgettia readi – type locality for species
* †Paladin
** †Paladin helmsensis
* †Palaeanodonta
* †Palaeocaudina
** †Palaeocaudina kansasensis
* †Palaeoceras – type locality for genus
** †Palaeoceras mutabile – type locality for species
** †Palaeoceras undulatum – type locality for species
* †Palaeogeminella
** †Palaeogeminella folkii
* †Palaeoneilo
** †Palaeoneilo taffiana
* Fossilized skeleton of the Permian bony fish Palaeoniscum †Palaeoniscus – tentative report
* †Palaeophyllum
** †Palaeophyllum cateniforme – type locality for species
** †Palaeophyllum gracile – type locality for species
** †Palaeophyllum margaretae – type locality for species
** †Palaeophyllum thomi
* †Palaeostylus
* †Paleochiridota
** †Paleochiridota plummerae
** †Paleochiridota radiata – type locality for species
** †Paleochiridota terquemi – type locality for species
** †Paleochiridota waylandensis – type locality for species
* †Paleofavosites
** †Paleofavosites kuellmeri – type locality for species
** †Paleofavosites prayi – type locality for species
** †Paleofavosites sparsus – type locality for species
* †Paleowaagia
** †Paleowaagia cooperi – type locality for species
* †Paleyoldia
** †Paleyoldia glabra
* †Panderodus
** †Panderodus equicostatus
** †Panderodus panderi
** †Panderodus unicostatus
* †Panduralimulus – type locality for genus
** †Panduralimulus babcocki – type locality for species
* Pantylus †Pantylus – type locality for genus
** †Pantylus coicodus – type locality for species
** †Pantylus cordatus – type locality for species
* †Parabolinella
** †Parabolinella triarthroides – tentative report
** †Parabolinella triathroides – tentative report
* †Paraboultonia – type locality for genus
** †Paraboultonia splendens – type locality for species
* †Paraceltites
** †Paraceltites altudensis – type locality for species
** †Paraceltites elegans
** †Paraceltites multicostatus – type locality for species
** †Paraceltites ornatus
* †Paraconularia
** †Paraconularia leonardensis
* †Paracravenoceras
** †Paracravenoceras barnettense – type locality for species
** †Paracravenoceras ozarkense
* †Paraduplophyllum
** †Paraduplophyllum amplexoides – type locality for species
** †Paraduplophyllum multiplicatum – type locality for species
** †Paraduplophyllum nealranchense – type locality for species
** †Paraduplophyllum oppositum – type locality for species
** †Paraduplophyllum tubaeformis – type locality for species
** †Paraduplophyllum vermiculare – type locality for species
* †Parafenestralia
** †Parafenestralia gregalis – or unidentified comparable form
* †Parafusulina
** †Parafusulina amoena – type locality for species
* †Paragastrioceras
** †Paragastrioceras type locality for species – informal
* †Paragoniozona
** †Paragoniozona granulostriata
** †Paragoniozona multilirata – or unidentified comparable form
** †Paragoniozona nodolirata – or unidentified comparable form
* †Paraheritschioides
** †Paraheritschioides californiense
* †Parahystricurus
* †Parajuresania
** †Parajuresania nebrascensis
* †Paralegoceras
** †Paralegoceras texanum – type locality for species
* †Parallelodon
** †Parallelodon multistriatus
* †Paralleynia – tentative report
** †Paralleynia acclinis – type locality for species
* †Paramphicrinus
* †Paranorella
** †Paranorella aquilonia
** †Paranorella comptula
* †Paraparchites
** †Paraparchites marathonensis – type locality for species
* †Parapenascoceras
** †Parapenascoceras sanandreasense
* †Paraperrinites
** †Paraperrinites subcumminsi – type locality for species
* †Paraplethopeltis
* †Parapolypora
** †Parapolypora daurica – or unidentified comparable form
** †Parapolypora novella – or unidentified comparable form
** †Parapolypora sparsa – or unidentified related form
* †Parareteograptus
* †Paraschistoceras
** †Paraschistoceras costiferum – type locality for species
** †Paraschistoceras hildrethi
** †Paraschistoceras reticulatum
* †Paraschizodus
** †Paraschizodus rothi – type locality for species
* †Paraschwagerina
** †Paraschwagerina shuleri – type locality for species
* †Parashumardites
** †Parashumardites fornicatus – type locality for species
** †Parashumardites sellardsi – type locality for species
** †Parashumardites senex
* †Paraspiriferina
** †Paraspiriferina amoena
** †Paraspiriferina billingsi
** †Paraspiriferina cellulana – type locality for species
** †Paraspiriferina evax – type locality for species
** †Paraspiriferina laqueata – type locality for species
** †Paraspiriferina paginata
** †Paraspiriferina pulchra
** †Paraspiriferina rotundata – type locality for species
** †Paraspiriferina sapinea
** †Paraspiriferina setulosa
** †Paraspiriferina sulcata
* †Parauvanella
** †Parauvanella minima
* †Parenteletes
** †Parenteletes cooperi
** †Parenteletes superbus – type locality for species
* †Pariotichus – type locality for genus
** †Pariotichus brachyops – type locality for species
* †Parioxys – type locality for genus
** †Parioxys bolli – type locality for species
** †Parioxys ferricolus – type locality for species
* †Parulocrinus
** †Parulocrinus americanus – type locality for species
* Patella – tentative report
* †Patellilabia
** †Patellilabia junior – type locality for species
* †Patellostium
** †Patellostium ourayensis
* †Paucipora
** †Paucipora subborealis – or unidentified comparable form
* †Paucispinifera
** †Paucispinifera auriculata
** †Paucispinifera comancheana – type locality for species
** †Paucispinifera costellata – type locality for species
** †Paucispinifera guadalupensis
** †Paucispinifera indentata – type locality for species
** †Paucispinifera intermedia
** †Paucispinifera latidorsata
** †Paucispinifera magnispina
** †Paucispinifera parasulcata
** †Paucispinifera quadrata – type locality for species
** †Paucispinifera rara
** †Paucispinifera rectangulata
** †Paucispinifera spinosa
** †Paucispinifera sulcata – type locality for species
** †Paucispinifera suspecta
** †Paucispinifera transversa – type locality for species
** †Paucispinifera tumida
* Fossils of the Late Devonian-Permian fern-like fronds Pecopteris †Pecopteris
** †Pecopteris arborescens
** †Pecopteris candolleana
** †Pecopteris densifolia – tentative report
** †Pecopteris grandifolia
** †Pecopteris hemitelioides
** †Pecopteris tenuinervis
** †Pecopteris unita
* †Pedanochiton – type locality for genus
** †Pedanochiton discomptus – type locality for species
* †Pedavis
** †Pedavis biexoramus
* †Pegmavalvula
** †Pegmavalvula delicata – type locality for species
** †Pegmavalvula gloveri – type locality for species
* Life restoration of the Permian amphibian Pelodosotis †Pelodosotis – type locality for genus
** †Pelodosotis elongatum – type locality for species
* †Peniculauris
** †Peniculauris bassi
** †Peniculauris costata – type locality for species
** †Peniculauris imitata
** †Peniculauris ivesi
** †Peniculauris peniculifera
** †Peniculauris subcostata – type locality for species
** †Peniculauris transversa
* †Penniretepora
* †Pennoceras
** †Pennoceras seamani – type locality for species
* †Perimestocrinus
** †Perimestocrinus excavatus – type locality for species
** †Perimestocrinus moseleyi – type locality for species
* †Peripetoceras
** †Peripetoceras bridgeportense – type locality for species
* †Peritrochia – type locality for genus
** †Peritrochia erebus
* †Permanomia
** †Permanomia texana – type locality for species
* †Permoconcha
** †Permoconcha conica – type locality for species
** †Permoconcha tabulata – type locality for species
* †Permocorynella
** †Permocorynella capitanense – type locality for species
* †Permophorus
** †Permophorus albequus
** †Permophorus lunulus – type locality for species
** †Permophorus mexicanus
* †Permophricodothyris
** †Permophricodothyris bullata – type locality for species
** †Permophricodothyris cordata – type locality for species
* †Pernopecten
** †Pernopecten obliquus
** †Pernopecten symmetricus
** †Pernopecten yini
* †Perrinites
** †Perrinites gouldi – type locality for species
** †Perrinites hilli – type locality for species
** †Perrinites tardus – type locality for species
** †Perrinites vidriensis
* †Peruvispira
** †Peruvispira delicata
* Fossilized tooth of the Carboniferous-Permian shark Petalodus †Petalodus
* †Petasmaia
** †Petasmaia expansa
* †Petasmatherus
** †Petasmatherus depressus
** †Petasmatherus mundus
** †Petasmatherus nitidus – type locality for species
** †Petasmatherus opulus – type locality for species
** †Petasmatherus pumilus – type locality for species
** †Petasmatherus pusillus
** †Petasmatherus recticardinatus
* †Petrocrania
** †Petrocrania diabloensis – type locality for species
** †Petrocrania exasperata
** †Petrocrania modesta
** †Petrocrania septifera – type locality for species
** †Petrocrania teretis – type locality for species
* †Phaneroceras
** †Phaneroceras compressum
** †Phaneroceras lenticulare – type locality for species
* †Phanerotrema – tentative report
* †Pharkidonotus
** †Pharkidonotus harrodi
** †Pharkidonotus megalius – or unidentified related form
** †Pharkidonotus percarinatus
** †Pharkidonotus westi – type locality for species
* †Phasmatocycas
** †Phasmatocycas spectabilis – type locality for species
* †Phestia
** †Phestia bellistriata
* †Philhedra
* Life restoration of the Carboniferous-Permian amphibian Phlegethontia. †Phlegethontia – tentative report
* †Phonerpeton
** †Phonerpeton pricei – type locality for species
** †Phonerpeton whitei – type locality for species
* †Phrenophoria
** †Phrenophoria anterocostata
** †Phrenophoria bicostata
** †Phrenophoria compressa
** †Phrenophoria corpulenta
** †Phrenophoria depressa
** †Phrenophoria incomitata
** †Phrenophoria irregularis
** †Phrenophoria nesiotes
** †Phrenophoria nudumbona – type locality for species
** †Phrenophoria pentagonalis – type locality for species
** †Phrenophoria perplexa
** †Phrenophoria pinguiformis
** †Phrenophoria pinguis – type locality for species
** †Phrenophoria planifrons
** †Phrenophoria planiventra
** †Phrenophoria repugnans
** †Phrenophoria subcarinata – type locality for species
** †Phrenophoria ventricosa – type locality for species
** †Phrenophoria vetula
* †Phricodothyris
** †Phricodothyris catatona
** †Phricodothyris guadalupensis
* †Phymatopleura
** †Phymatopleura brazoensis
** †Phymatopleura nodosa
* †Pileochiton – type locality for genus
** †Pileochiton cancellus – type locality for species
* †Pileolites – type locality for genus
** †Pileolites baccatus – type locality for species
* †Piloceras
* †Pinnularia
* †Pintoceras – type locality for genus
** †Pintoceras postvenatum – type locality for species
* †Pirasocrinus
** †Pirasocrinus invaginatus – type locality for species
* †Pithodea
** †Pithodea tornatilis – or unidentified comparable form
* Fossilized shell of the Ordovician brachiopod Plaesiomys †Plaesiomys
** †Plaesiomys bellistriatus
** †Plaesiomys subquadrata
* †Plagioglypta
** †Plagioglypta annulostriata
** †Plagioglypta girtyi
* †Plagiostoma – report made of unidentified related form or using admittedly obsolete nomenclature
** †Plagiostoma deltoideum
* †Planispina
** †Planispina conida
* †Planotectus
** †Planotectus cymbellatus – type locality for species
* †Platyceras
* Life restoration of the Carboniferous-Permian sail-backed amphibian Platyhystrix †Platyhystrix – or unidentified comparable form
* †Platysaccus
** †Platysaccus papilionis
** †Platysaccus saarensis
* †Platyzona
** †Platyzona anguispira – type locality for species
** †Platyzona cancellata – type locality for species
** †Platyzona pagoda – type locality for species
** †Platyzona rotunda
* †Plaxocrinus
** †Plaxocrinus laxus – type locality for species
** †Plaxocrinus oeconomicus – type locality for species
* †Plectelasma
** †Plectelasma dubium
** †Plectelasma guadalupense
** †Plectelasma kingi
** †Plectelasma nitidum
** †Plectelasma planidorsatum
* †Plectospira
** †Plectospira problematica
* †Plectronoceras
** †Plectronoceras exile – type locality for species
* †Plerodiffia – type locality for genus
** †Plerodiffia eaglebuttensis – type locality for species
* †Plethospira
** †Plethospira rotunda – type locality for species
* †Pleurelasma
** †Pleurelasma costatum
* Fossilized shell of the Carboniferous-Triassic nautiloid cephalopod Pleuronautilus †Pleuronautilus
** †Pleuronautilus cooperi – type locality for species
** †Pleuronautilus gregarius – type locality for species
** †Pleuronautilus megaporus – type locality for species
** †Pleuronautilus mutatus – type locality for species
** †Pleuronautilus praecursor
** †Pleuronautilus shumardianus
* †Pleurophorus – report made of unidentified related form or using admittedly obsolete nomenclature
** †Pleurophorus delawarensis – type locality for species
** †Pleurophorus occidentalis
* Fossilized shell of a Pleurotomaria slit snail Pleurotomaria – report made of unidentified related form or using admittedly obsolete nomenclature
** †Pleurotomaria arenaria – type locality for species
** †Pleurotomaria carinifera – type locality for species
** †Pleurotomaria discoidea – type locality for species
** †Pleurotomaria elderi – type locality for species
** †Pleurotomaria halliana – type locality for species
** †Pleurotomaria mica – type locality for species
** †Pleurotomaria neglecta – type locality for species
** †Pleurotomaria perornata – type locality for species
** †Pleurotomaria planulata – type locality for species
** †Pleurotomaria proutiana – type locality for species
** †Pleurotomaria putilla
** †Pleurotomaria richardsoni – type locality for species
* †Plicochonetes
** †Plicochonetes ornatus – or unidentified comparable form
* †Plummeroceras
** †Plummeroceras plummeri – type locality for species
* †Poacordaites
** †Poacordaites tenuifolius – or unidentified comparable form
* †Podozamites
* †Poikilosakos
** †Poikilosakos informis
** †Poikilosakos petaloides
* †Polidevcia
** †Polidevcia bellistriata
* †Polyacrodus
** †Polyacrodus lapalomensis – type locality for species
** †Polyacrodus ritchiei – type locality for species
** †Polyacrodus wichitaensis
** †Polyacrodus zideki – type locality for species
* †Polydiexodina
** †Polydiexodina shumardi
* †Polylophidium – type locality for genus
** †Polylophidium discus – type locality for species
* †Polymorpharia
** †Polymorpharia polymorpha
* †Polypora
** †Polypora andina
** †Polypora balkhaschensiformis
** †Polypora bassleri – or unidentified related form
** †Polypora crassa – or unidentified comparable form
** †Polypora darashamensis – or unidentified comparable form
** †Polypora elliptica – or unidentified related form
** †Polypora fujimotoi – or unidentified related form
** †Polypora halliana – or unidentified related form
** †Polypora hirsuta
** †Polypora hivatchensis – or unidentified related form
** †Polypora irregularis – or unidentified comparable form
** †Polypora keyserlingi – or unidentified related form
** †Polypora mexicana
** †Polypora nodocarinata
** †Polypora soyanensis
** †Polypora virga – or unidentified comparable form
** †Polypora vitiosa – or unidentified related form
* †Polyporella
** †Polyporella perturbata
** †Polyporella ulakhanensis – or unidentified comparable form
* †Polysiphon – type locality for genus
** †Polysiphon mirabilis – type locality for species
* †Polysiphonaria – type locality for genus
** †Polysiphonaria flabellata – type locality for species
** †Polysiphonaria flabellatum
* †Pontisia
** †Pontisia costata
** †Pontisia franklinensis
** †Pontisia kingi – type locality for species
** †Pontisia longicosta
** †Pontisia magnicostata
** †Pontisia nanas
** †Pontisia parva
** †Pontisia robusta
** †Pontisia stehlii – type locality for species
** †Pontisia truncata
** †Pontisia ventricola
** †Pontisia wolfcampensis
* †Popanoceras
** †Popanoceras walcotti – type locality for species
* †Posidonia
* †Pragnellia
** †Pragnellia delicatula – type locality for species
* †Prehoffmannia – type locality for genus
** †Prehoffmannia milleri – type locality for species
* †Preperonidella
** †Preperonidella delicata
** †Preperonidella rigbyi
* †Preshumardites
** †Preshumardites gaptankensis
** †Preshumardites illinoisensis
** †Preshumardites stainbrooki – type locality for species
* Priscopedatus
** †Priscopedatus bullatus – type locality for species
** †Priscopedatus buno – type locality for species
** †Priscopedatus radiatus – type locality for species
** †Priscopedatus stellatus – type locality for species
* †Procostatoria – type locality for genus
** †Procostatoria cooperi
** †Procostatoria gloveri – type locality for species
** †Procostatoria sexaradiata
** †Procostatoria sexradiata
* †Prodentalium
** †Prodentalium canna
** †Prodentalium raymondi
* †Productina
** †Productina sampsoni
* †Productus
** †Productus calhounianus – tentative report
** †Productus hermosanus
** †Productus mexicanus – type locality for species
** †Productus norwoodii – tentative report
** †Productus semistriatus
* †Progyrolepis
** †Progyrolepis tricessimalaris – type locality for species
* †Properrinites
** †Properrinites bakeri
** †Properrinites boesei – type locality for species
** †Properrinites type locality for species – informal
* †Propinacoceras
* †Proplina
* †Propopanoceras
** †Propopanoceras postsimense
* †Prorichthofenia
* †Proshumardites
** †Proshumardites primus
* †Prostacheoceras
** †Prostacheoceras skinneri – type locality for species
** †Prostacheoceras type locality for species – informal
* †Prothalassoceras
** †Prothalassoceras caddoense – type locality for species
** †Prothalassoceras kingorum
** †Prothalassoceras welleri – type locality for species
* †Protocaptorhinus – type locality for genus
** †Protocaptorhinus pricei – type locality for species
* †Protoretepora
** †Protoretepora ampla – or unidentified comparable form
* †Protorothyris – type locality for genus
** †Protorothyris archeri – type locality for species
* †Protowentzelella
** †Protowentzelella cystosa
** †Protowentzelella kunthi
* †Protrete – type locality for genus
** †Protrete texanus – type locality for species
* †Protrochiscolithus
** †Protrochiscolithus alemanensis – type locality for species
* †Prouddenites
** †Prouddenites primus – type locality for species
* Life restoration of the Devonian-Permian tree fern Psaronius. Auguste Faguet (1877). †Psaronius
* †Pseudagnostus
** †Pseudagnostus nordicus
* †Pseudoalbaillella
** †Pseudoalbaillella cona – type locality for species
** †Pseudoalbaillella fusiformis – or unidentified related form
** †Pseudoalbaillella globosus
** †Pseudoalbaillella scalprata
* †Pseudodielasma – type locality for genus
** †Pseudodielasma brilli
** †Pseudodielasma gibberum
** †Pseudodielasma globulum
** †Pseudodielasma lobatum
** †Pseudodielasma magnum
** †Pseudodielasma minor
** †Pseudodielasma ovatum – type locality for species
** †Pseudodielasma perplexa – type locality for species
** †Pseudodielasma pingue
** †Pseudodielasma pinyonense
** †Pseudodielasma plicatum
** †Pseudodielasma scutulatum – type locality for species
** †Pseudodielasma subcirculare
** †Pseudodielasma sulcatum
* †Pseudofusulina
** †Pseudofusulina powwowensis
* †Pseudogastrioceras
** †Pseudogastrioceras texanum – type locality for species
* †Pseudohystricurus
* †Pseudoleptodus – type locality for genus
** †Pseudoleptodus annosus
** †Pseudoleptodus conicus
** †Pseudoleptodus cucullatus
** †Pseudoleptodus getawayensis – type locality for species
** †Pseudoleptodus giganteus
** †Pseudoleptodus grandis
** †Pseudoleptodus granulosus
** †Pseudoleptodus guadalupensis – type locality for species
** †Pseudoleptodus lepidus
** †Pseudoleptodus nodosus
** †Pseudoleptodus primitivus
* Fossilized shell of a Pseudomelania sea snail †Pseudomelania – report made of unidentified related form or using admittedly obsolete nomenclature
* †Pseudomonotis
** †Pseudomonotis acinetus
** †Pseudomonotis hawni
** †Pseudomonotis likharevi
** †Pseudomonotis speluncaria – tentative report
** †Pseudomonotis sublaevis
* †Pseudooneotodus
** †Pseudooneotodus beckmanni
** †Pseudooneotodus bicornis
** †Pseudooneotodus linguicornis
* †Pseudoparalegoceras
** †Pseudoparalegoceras bellilineatum
** †Pseudoparalegoceras brazoense – type locality for species
* †Pseudopronorites
** †Pseudopronorites arkansiensis
** †Pseudopronorites llanoensis – type locality for species
* †Pseudorthoceras
** †Pseudorthoceras knoxense
* †Pseudoschwagerina
** †Pseudoschwagerina beedei
** †Pseudoschwagerina geiseri
** †Pseudoschwagerina gerontica
** †Pseudoschwagerina uddeni
* †Pseudovidrioceras
** †Pseudovidrioceras dunbari
* †Pseudovirgula – type locality for genus
** †Pseudovirgula tenuis – type locality for species
* †Pseudovoltzia
** †Pseudovoltzia liebeana
* †Pseudowannerophyllum
** †Pseudowannerophyllum solidum – type locality for species
* †Pseudozaphrentoides
** †Pseudozaphrentoides ordinatus – type locality for species
* †Pseudozygopleura
** †Pseudozygopleura belli – type locality for species
** †Pseudozygopleura moorei
** †Pseudozygopleura multicostata
** †Pseudozygopleura obtusicacuminis
** †Pseudozygopleura scitula
** †Pseudozygopleura type locality for species – informal
* †Psilocamara – type locality for genus
** †Psilocamara hesperia
** †Psilocamara renfroarum – type locality for species
* Pteria – report made of unidentified related form or using admittedly obsolete nomenclature
** †Pteria richardsoni
** †Pteria squamifera – type locality for species
* †Pterinopectinella
** †Pterinopectinella spinifera
* †Pterocephalia
* †Pterochiton
** †Pterochiton newelli – type locality for species
** †Pterochiton spatulatus
** †Pterochiton texanus – type locality for species
* †Pteronites
* †Ptilotorhynchus
** †Ptilotorhynchus delicatum
* †Ptychocarpus
* †Ptygmactrum – type locality for genus
** †Ptygmactrum acutum
** †Ptygmactrum angulatum
** †Ptygmactrum depressum
** †Ptygmactrum extensum – type locality for species
** †Ptygmactrum mordicum
** †Ptygmactrum spiculatum – type locality for species
* †Pudoproetus
** †Pudoproetus chappelensis
* †Pugnax
** †Pugnax osagensis
* †Pugnoides
** †Pugnoides bidentatus
** †Pugnoides elegans
** †Pugnoides shumardianus
** †Pugnoides swallovianus
** †Pugnoides texanus
* †Pulchratia
** †Pulchratia symmetricus
* †Pulchrilamina
** †Pulchrilamina spinosa
* †Pulsatospongia – type locality for genus
** †Pulsatospongia obconica – type locality for species
* †Punctospirifer
** †Punctospirifer billingsii
** †Punctospirifer kentuckensis
* †Pustula
** †Pustula semipunctata

## Q

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Quadratia
** †Quadratia egregia – type locality for species
* †Quadrochonetes
** †Quadrochonetes girtyi – type locality for species
** †Quadrochonetes praecursor
* †Quasicaecilia – type locality for genus
** †Quasicaecilia texana – type locality for species

## R

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Radiotrabeculopora
** †Radiotrabeculopora virga – type locality for species
* †Rallacosta
** †Rallacosta actina
** †Rallacosta imporcata
** †Rallacosta laminata
** †Rallacosta xystica
* †Ramavectus
** †Ramavectus diabloensis
* †Ramipora
** †Ramipora hochstetteri – or unidentified related form
* †Ramosothalamiella – type locality for genus
** †Ramosothalamiella divaricata – type locality for species
* †Rananasus
* †Raphistomina
* †Rasettia
** †Rasettia capax – or unidentified comparable form
* †Rauserella
** †Rauserella erratica
* †Rayonnoceras
** †Rayonnoceras huecoense – type locality for species
* †Rectograptus
** †Rectograptus amplexicaulis
* †Regrantia
** †Regrantia linoproductiformis
* †Reiszorhinus – type locality for genus
** †Reiszorhinus olsoni – type locality for species
* †Renalcis
* Retaria †Retaria – report made of unidentified related form or using admittedly obsolete nomenclature
** †Retaria leplayi – tentative report
* †Reteporidra
** †Reteporidra orientalis – or unidentified comparable form
* †Retichonetes – tentative report
** †Retichonetes gibberulus – type locality for species
* †Reticularia
** †Reticularia cooperensis
* †Reticulariina
** †Reticulariina bufala
** †Reticulariina cerina – type locality for species
** †Reticulariina craticula
** †Reticulariina echinata
** †Reticulariina girtyi
** †Reticulariina hueconiana – type locality for species
** †Reticulariina impressa
** †Reticulariina laxa
** †Reticulariina newelli
** †Reticulariina phoxa
** †Reticulariina powwowensis
** †Reticulariina pristina – type locality for species
** †Reticulariina pusilla
** †Reticulariina roscida
** †Reticulariina senticosa
** †Reticulariina strigosa
** †Reticulariina subulata
** †Reticulariina tetrica
** †Reticulariina venustula
** †Reticulariina welleri
* †Reticulatia
** †Reticulatia americana
** †Reticulatia huecoensis – type locality for species
** †Reticulatia robusta
* †Retispira
** †Retispira bellireticulata
** †Retispira fragilis – type locality for species
** †Retispira kansasensis
** †Retispira lyelli – type locality for species
** †Retispira meekiana
** †Retispira modesta
** †Retispira texana – type locality for species
* †Rhabdiferoceras
* †Rhabdomeson
** †Rhabdomeson bellum
* †Rhabdotocochlis
** †Rhabdotocochlis type locality for species – informal
* †Rhamnaria – type locality for genus
** †Rhamnaria eximia
** †Rhamnaria grandis
** †Rhamnaria kingorum – type locality for species
** †Rhamnaria rectangulata
** †Rhamnaria shumardi
** †Rhamnaria sulcata
** †Rhamnaria tenuispinosa – type locality for species
** †Rhamnaria vinnula
* †Rhipidomella
** †Rhipidomella carbonaria
** †Rhipidomella hessensis – type locality for species
** †Rhipidomella hispidula – type locality for species
** †Rhipidomella miscella
** †Rhipidomella perminuta
* †Rhombopora
** †Rhombopora lepidodendroides
* Fossilized shell of the Silurian-Eocene articulate brachiopod Rhynchonella †Rhynchonella – report made of unidentified related form or using admittedly obsolete nomenclature
** †Rhynchonella guadalupae – type locality for species
** †Rhynchonella texana
* †Rhynchopora
** †Rhynchopora dossena
** †Rhynchopora guadalupensis
** †Rhynchopora hebetata
** †Rhynchopora illinoisensis
** †Rhynchopora molina – type locality for species
** †Rhynchopora palumbula – type locality for species
** †Rhynchopora patula
** †Rhynchopora sansabensis – type locality for species
** †Rhynchopora sphenoides
** †Rhynchopora taylori
** †Rhynchopora tenera
* †Rhynchotrema
** †Rhynchotrema iowense
* †Rhytiophora
** †Rhytiophora blairi – or unidentified comparable form
** †Rhytiophora calhounensis
* †Rhytisia
** †Rhytisia rugosa
* †Ribeiria
** †Ribeiria calcifera
* †Richardsonites
** †Richardsonites richardsonianus
* †Rigbyella
** †Rigbyella girtyi – type locality for species
* †Rigrantia
** †Rigrantia costella
** †Rigrantia hessensis – type locality for species
** †Rigrantia planumbona
** †Rigrantia regularis
* †Rioceras
** †Rioceras dartoni – type locality for species
** †Rioceras tubulare – type locality for species
** †Rioceras wellsi – type locality for species
* †Roadoceras
** †Roadoceras beedei – type locality for species
** †Roadoceras roadense – type locality for species
* †Roemerella
** †Roemerella gigantissima – type locality for species
* †Romeria – type locality for genus
** †Romeria prima – type locality for species
** †Romeria texana – type locality for species
* †Rota
** †Rota martini
* †Rotaia
* †Rothianiscus – type locality for genus
** †Rothianiscus multidonta – type locality for species
* †Roundyella
** †Roundyella dorsopapillosa – type locality for species
* Life restoration of the Permian amphibian Rubeostratilia †Rubeostratilia – type locality for genus
** †Rubeostratilia texensis – type locality for species
* †Rugaria
** †Rugaria crassa
** †Rugaria hessensis – type locality for species
** †Rugaria molengraaffi – tentative report
* †Rugatia
** †Rugatia convexa
** †Rugatia incurva
** †Rugatia incurvata – type locality for species
** †Rugatia mckeei
** †Rugatia occidentalis
** †Rugatia paraindica
* †Rugosochonetes
** †Rugosochonetes burlingtonensis
* †Russellites
** †Russellites taeniata
* †Ruthenoceras – report made of unidentified related form or using admittedly obsolete nomenclature

## S

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Saffordophyllum
** †Saffordophyllum newcombae – type locality for species
* †Sagenodus
* †Sagittoceras – tentative report
** †Sagittoceras hathawayanum – or unidentified comparable form
* †Sallya
** †Sallya bicincta
** †Sallya linsa – type locality for species
** †Sallya striata – type locality for species
* †Salvadorea
** †Salvadorea kingae
* †Samaropsis
* †Sandolasma – tentative report
** †Sandolasma cooperi – type locality for species
* †Sandrewia – type locality for genus
** †Sandrewia texana – type locality for species
* †Sanniolus – type locality for genus
** †Sanniolus sigmoides – type locality for species
* †Saportaea – tentative report
* †Sarganostega
** †Sarganostega murata
** †Sarganostega pressa
** †Sarganostega prisca
** †Sarganostega pyramidalis – type locality for species
** †Sarganostega transversalis
* Restoration of the Carboniferous amphibian Sauropleura †Sauropleura
** †Sauropleura bairdi – type locality for species
* †Scacchinella
** †Scacchinella americana
** †Scacchinella exasperata – type locality for species
** †Scacchinella gigantea
** †Scacchinella primitiva
** †Scacchinella titan – type locality for species
** †Scacchinella triangulata – type locality for species
* †Scaldia
* †Scapanops – type locality for genus
** †Scapanops neglecta – type locality for species
* †Scapharina
** †Scapharina levis
** †Scapharina quadrata
** †Scapharina rugosa
* †Sceletonia
** †Sceletonia crassa
* †Scenesia
** †Scenesia extensa
* †Schaefferichthys – type locality for genus
** †Schaefferichthys leudersensis – type locality for species
* †Scheiella – type locality for genus
** †Scheiella thesaurium – type locality for species
* †Scheiia
** †Scheiia tuberosa
* †Schematochiton
** †Schematochiton arthurcooperi
* †Schistoceras
** †Schistoceras missouriense – type locality for species
* †Schizodus
** †Schizodus canalis
** †Schizodus ovatus
** †Schizodus securus – type locality for species
** †Schizodus supaiensis
** †Schizodus texanus – type locality for species
** †Schizodus ulrichi – or unidentified comparable form
** †Schizodus wyomingensis
* †Schizograptus
* †Schizopea
* †Schizophoria
* †Schubertella
** †Schubertella kingi
* †Schuchertella – tentative report
** †Schuchertella subvexa
* †Schwagerina
** †Schwagerina bellula
** †Schwagerina crassitectoria
** †Schwagerina davisi
** †Schwagerina diversiformis
** †Schwagerina emaciata
** †Schwagerina eolata
** †Schwagerina franklinensis
** †Schwagerina grandensis – or unidentified related form
** †Schwagerina huecoensis
** †Schwagerina knighti
** †Schwagerina menziesi – type locality for species
** †Schwagerina nelsoni
** †Schwagerina neolata
** †Schwagerina thompsoni – tentative report
* †Schyroconcha
** †Schyroconcha spinosa – or unidentified related form
* Restorative portrait of the Permian synapsid (mammal precursor) Secodontosaurus †Secodontosaurus
** †Secodontosaurus obtusidens – type locality for species
** †Secodontosaurus willistoni – type locality for species
* †Sedenticellula
** †Sedenticellula sacra
* †Sedgwickia
** †Sedgwickia topekaensis
* †Sellardsicrinus – tentative report
* †Semipetasus – type locality for genus
** †Semipetasus signatus – type locality for species
* †Septimyalina
** †Septimyalina burmai
** †Septimyalina perattenuata
* †Septopora
** †Septopora biserialis – or unidentified comparable form
** †Septopora blanda – or unidentified comparable form
** †Septopora cestriensis – or unidentified comparable form
** †Septopora flabellata – or unidentified comparable form
** †Septopora lineata – or unidentified related form
** †Septopora orientalis
** †Septopora pinnata – or unidentified related form
** †Septopora quasiorientalis – or unidentified comparable form
** †Septopora robusta – or unidentified related form
** †Septopora spinulosa – or unidentified related form
* Serpula – tentative report
* †Sestropoma
** †Sestropoma cribriferum
* Fossilized skeleton of the Permian primitive four-limbed animal Seymouria †Seymouria – type locality for genus
** †Seymouria baylorensis – type locality for species
* †Shamovella
* †Shansiella
** †Shansiella beckwithana
** †Shansiella carbonaria
* †Shouchangoceras
** †Shouchangoceras americanum – type locality for species
* †Shumardella
** †Shumardella obsolescens
* †Shumardites
** †Shumardites cuyleri – type locality for species
** †Shumardites simondsi
* †Shwedagonia
** †Shwedagonia elegans – type locality for species
* Fossilized stump of the Carboniferous-Permian club moss relative Sigillaria †Sigillaria
** †Sigillaria brardii
* †Sigillariostrobus
** †Sigillariostrobus hastatus
* †Simplicarina
** †Simplicarina incompta
* †Sinuella – type locality for genus
** †Sinuella minuta – type locality for species
* †Sinuopea
** †Sinuopea humerosa
** †Sinuopea vera
* †Siphonosia
** †Siphonosia alleni
* †Skinnerella
** †Skinnerella biconica – type locality for species
** †Skinnerella brevis – type locality for species
** †Skinnerella cylindrica – type locality for species
** †Skinnerella diabloensis
** †Skinnerella formosa – type locality for species
** †Skinnerella magna – type locality for species
** †Skinnerella robusta – type locality for species
** †Skinnerella schucherti
** †Skinnerella speciosa – type locality for species
** †Skinnerella tenuis – type locality for species
* †Skinnerina
** †Skinnerina fusiformis – type locality for species
** †Skinnerina mildredae – type locality for species
** †Skinnerina rotundata – type locality for species
* †Slaugenhopia – type locality for genus
** †Slaugenhopia texensis – type locality for species
* †Soleachiton – type locality for genus
** †Soleachiton yochelsoni – type locality for species
* Modern specimen of the marine bivalve Solemya Solemya – tentative report
* †Soleniscus
** †Soleniscus diminutus – type locality for species
** †Soleniscus girtyi – type locality for species
** †Soleniscus primigenius
** †Soleniscus primogenius
** †Soleniscus regularis
** †Soleniscus texanus – type locality for species
** †Soleniscus typicus
** †Soleniscus variabilis
* †Solenochilus
** †Solenochilus kempae – type locality for species
* †Solenopora
** †Solenopora texana
* †Sollasia
** †Sollasia ostiolata
* †Sollasiella – type locality for genus
** †Sollasiella reticulata – type locality for species
* †Sowburia
** †Sowburia texana – type locality for species
* †Spermatodus
** †Spermatodus pustulosus
* Life restoration of the Late Devonian-Permian Sphenacanthus †Sphenacanthus
* †Sphenophyllum
** †Sphenophyllum oblongifolium
** †Sphenophyllum obovatum
* †Sphenopteris
** †Sphenopteris macilenta – or unidentified comparable form
* †Spica
** †Spica texana – type locality for species
* †Spinarella
** †Spinarella costellata
** †Spinarella lobata
** †Spinarella paulula
** †Spinarella perfecta
* †Spinifrons
** †Spinifrons delicatula
** †Spinifrons magna
** †Spinifrons quadrata
* †Spinofenestella
** †Spinofenestella spinulosa – or unidentified related form
* †Spinomarginifera – or unidentified comparable form
* Fossilized shell of the Late Ordovician-Late Triassic brachiopod Spirifer †Spirifer
** †Spirifer chappelensis – type locality for species
** †Spirifer gregeri – or unidentified comparable form
** †Spirifer guadalupensis – type locality for species
** †Spirifer rockymontanus
* †Spiriferella
** †Spiriferella calcarata
** †Spiriferella clypeata
** †Spiriferella embrithes
** †Spiriferella gloverae
** †Spiriferella gravis – type locality for species
** †Spiriferella levis – type locality for species
** †Spiriferella propria
** †Spiriferella sulcifer – type locality for species
* †Spiriferellina
** †Spiriferellina hilli – type locality for species
** †Spiriferellina nasuta
** †Spiriferellina nuda
** †Spiriferellina paucicostata – type locality for species
** †Spiriferellina tricosa – type locality for species
** †Spiriferellina vescula
* †Spiriferinaella
** †Spiriferinaella limata
** †Spiriferinaella medialis
** †Spiriferinaella scalpata – type locality for species
* Modern shells of the polychaete worm Spirorbis Spirorbis
** †Spirorbis carbonarius – or unidentified comparable form
* †Spiroscala – type locality for genus
** †Spiroscala pagoda – type locality for species
** †Spiroscala pulchra – type locality for species
* †Spuriosa
** †Spuriosa circularis
* †Spyridiophora
** †Spyridiophora compacta
** †Spyridiophora distincta – type locality for species
** †Spyridiophora reticulata – type locality for species
* †Stacheoceras
** †Stacheoceras gilliamense – type locality for species
* †Staffella
** †Staffella lacunosa
* †Stearoceras
** †Stearoceras conchiferum
** †Stearoceras gibbosum – or unidentified related form
** †Stearoceras militarium – type locality for species
** †Stearoceras simplex – type locality for species
* †Stegochiton – type locality for genus
** †Stegochiton coxi – type locality for species
** †Stegochiton onerosus – type locality for species
* †Stegocoelia
** †Stegocoelia copei
** †Stegocoelia crenulata
** †Stegocoelia dozierensis – type locality for species
** †Stegocoelia missouriensis
* †Stellarocrinus
** †Stellarocrinus texani – type locality for species
* †Stenocoelia
* †Stenodiscus – tentative report
* †Stenoglaphyrites
** †Stenoglaphyrites incisus
* †Stenolobulites
** †Stenolobulites admiralensis – type locality for species
** †Stenolobulites depressus – type locality for species
** †Stenolobulites stenolobulus – type locality for species
** †Stenolobulites subglobosus – type locality for species
** †Stenolobulites type locality for species – informal
* †Stenopoceras
** †Stenopoceras inexpectans – type locality for species
** †Stenopoceras whitei – type locality for species
* †Stenopora
** †Stenopora granulosa – type locality for species
** †Stenopora richardsoni
* †Stenopronorites
* †Stenoscisma
** †Stenoscisma abbreviatum
** †Stenoscisma aberrans
** †Stenoscisma amoenum
** †Stenoscisma aptatum
** †Stenoscisma bellatulum
** †Stenoscisma bonum
** †Stenoscisma calvatum
** †Stenoscisma camurum
** †Stenoscisma doricranum
** †Stenoscisma exutum
** †Stenoscisma fabarium
** †Stenoscisma hadrum – type locality for species
** †Stenoscisma hueconianum – type locality for species
** †Stenoscisma inaequale – type locality for species
** †Stenoscisma indentata
** †Stenoscisma kalum
** †Stenoscisma levicostum
** †Stenoscisma maniculum
** †Stenoscisma multicostum
** †Stenoscisma myioides
** †Stenoscisma oblisum
** †Stenoscisma pansum
** †Stenoscisma peneleve
** †Stenoscisma problematicum
** †Stenoscisma pyraustoides – type locality for species
** †Stenoscisma renode – type locality for species
** †Stenoscisma repigratum
** †Stenoscisma schlotheimi – tentative report
** †Stenoscisma thevenini
** †Stenoscisma trabeatum
** †Stenoscisma triquetrum
** †Stenoscisma venustum
* †Stephanozyga
** †Stephanozyga subnodosa
* Restorative portrait of the Permian synapsid (mammal precursor) Steppesaurus †Steppesaurus – type locality for genus
** †Steppesaurus gurleyi – type locality for species
* †Stereodictyum – type locality for genus
** †Stereodictyum orthoplectum – type locality for species
* †Stereophallodon – type locality for genus
** †Stereophallodon ciscoensis – type locality for species
* †Stereostylus
** †Stereostylus adelus – type locality for species
* †Stethacanthulus
** †Stethacanthulus decorus
** †Stethacanthulus meccaensis
* Life restorations of a male (foreground) and female (background) of the Late Devonian-Carboniferous Chimaera relative Stethacanthus †Stethacanthus
** †Stethacanthus meccaensis
* †Stewartina
** †Stewartina convexa
** †Stewartina texana
* †Stioderma – type locality for genus
** †Stioderma coscinum – type locality for species
* †Straparollus
** †Straparollus savagei
* †Stratispongia – type locality for genus
** †Stratispongia cinctuta
* †Streblochondria
** †Streblochondria sculptilis
* †Streblopteria
** †Streblopteria montpelierensis
* †Streblotrypa
* †Strepsodiscus
** †Strepsodiscus paucivoluta
* †Streptacis
** †Streptacis inflata – type locality for species
** †Streptacis permiana – type locality for species
** †Streptacis piercei – type locality for species
** †Streptacis type locality for species – informal
** †Streptacis whitfieldi
* †Streptelasma
** †Streptelasma divaricans
* †Streptorhynchus – report made of unidentified related form or using admittedly obsolete nomenclature
** †Streptorhynchus shumardianus – tentative report
* †Striatites
** †Striatites richteri
* †Striatosaccites
** †Striatosaccites bullaeformis – type locality for species
** †Striatosaccites perisporites – type locality for species
** †Striatosaccites Type A – informal
* †Strigigenalis
* †Strigirhynchia
** †Strigirhynchia elongata
** †Strigirhynchia indentata – type locality for species
** †Strigirhynchia transversa
* †Strigogoniatites
** †Strigogoniatites fountaini – type locality for species
* †Strobeus
** †Strobeus brevis
** †Strobeus delawarensis – type locality for species
** †Strobeus paludinaeformis
** †Strobeus poromus
* †Stromatidium – type locality for genus
** †Stromatidium typicale – type locality for species
* †Strophalosia
* †Strophella
** †Strophella grandaevus
* Fossilized shell of the Ordovician-Silurian brachiopod Strophomena †Strophomena
** †Strophomena neglecta
* †Stuartwellercrinus
** †Stuartwellercrinus symmetricus – type locality for species
** †Stuartwellercrinus texanus – type locality for species
** †Stuartwellercrinus turbinatus – type locality for species
* †Stutchburia
* †Subkargalites
** †Subkargalites hargisi – type locality for species
** †Subkargalites parkeri
* †Subperrinites
** †Subperrinites bakeri – type locality for species
** †Subperrinites denhami – type locality for species
** †Subperrinites mooreae – type locality for species
* †Sulcataria
** †Sulcataria compacta
** †Sulcataria latisulcata
* †Svetlanoceras
** †Svetlanoceras moylei – type locality for species
* †Symphysurina
* †Syngastrioceras
** †Syngastrioceras globulosum
** †Syngastrioceras scotti
* †Synocladia
* †Syntrophina
* †Syntrophinella
* †Syringoclemis – tentative report
* Fossil of the Devonian tabulate coral Syringopora †Syringopora – tentative report

## T

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Tabulipora
** †Tabulipora carbonaria
* †Taenicephalus
* †Taeniopteris
** †Taeniopteris abnormis
** †Taeniopteris coriacea – tentative report
** †Taeniopteris eckardtii
** †Taeniopteris multinervis
* †Taeniopters
* †Tainoceras
** †Tainoceras clydense – type locality for species
* †Taphrosestria
** †Taphrosestria expansa
** †Taphrosestria peculiaris
* †Tapinotomaria
** †Tapinotomaria coronata – type locality for species
** †Tapinotomaria costata – type locality for species
** †Tapinotomaria crassa – type locality for species
** †Tapinotomaria duplicostata – type locality for species
** †Tapinotomaria globosa – type locality for species
** †Tapinotomaria mirabilis – type locality for species
** †Tapinotomaria pyramidalis – type locality for species
** †Tapinotomaria rugosa – type locality for species
** †Tapinotomaria submirabilis – type locality for species
* †Tappenosaurus – type locality for genus
** †Tappenosaurus magnus – type locality for species
* †Tarphyceras
** †Tarphyceras chadwickense
* †Tarthinia
* †Tautosia
** †Tautosia angulata
** †Tautosia distorta
** †Tautosia elegans
** †Tautosia expansa
** †Tautosia fastigiata
** †Tautosia galbina
** †Tautosia lenumbona
** †Tautosia magnisepta
** †Tautosia podistra – type locality for species
** †Tautosia pulchra
** †Tautosia shumardiana
** †Tautosia transenna – type locality for species
* †Teguliferina
** †Teguliferina armata
** †Teguliferina boesei – type locality for species
** †Teguliferina compacta – type locality for species
** †Teguliferina solidispinosa
* †Teiichispira
** †Teiichispira nanus – type locality for species
* †Temnocheilus
* †Terebratula – report made of unidentified related form or using admittedly obsolete nomenclature
** †Terebratula perinflata – type locality for species
* †Terebratuloidea
** †Terebratuloidea triplicata
* †Tersomius – type locality for genus
** †Tersomius texensis – type locality for species
* †Tesnusocaris – type locality for genus
** †Tesnusocaris goldichi – type locality for species
* Fossilized skull in multiple views of the Permian synapsid (mammal precursor) Tetraceratops †Tetraceratops – type locality for genus
** †Tetraceratops insignis – type locality for species
* †Tetralobula
* †Tetrataxis
* †Tetravirga
* †Texarina
** †Texarina elongata – type locality for species
** †Texarina oblongata
** †Texarina parallela
** †Texarina paucula
** †Texarina solida
** †Texarina wordensis – type locality for species
* †Texasodus – type locality for genus
** †Texasodus varidentatus – type locality for species
* †Texoceras
** †Texoceras texanum – type locality for species
* †Thaerodonta
** †Thaerodonta recedens – or unidentified comparable form
* †Thalattocanthus
** †Thalattocanthus consonus
* †Thamniscus
** †Thamniscus digitatus – type locality for species
* †Thamnosia
** †Thamnosia anterospinosa
** †Thamnosia arctica
** †Thamnosia capitanensis
** †Thamnosia parvispinosa
** †Thamnosia phragmophora
** †Thamnosia silicica
* †Thedusia – type locality for genus
** †Thedusia angustata
** †Thedusia biconvexa
** †Thedusia bucrenata
** †Thedusia dischides
** †Thedusia discissa
** †Thedusia emarginata
** †Thedusia magna
** †Thedusia mesocostata
** †Thedusia paucicostata
** †Thedusia procera – type locality for species
** †Thedusia trigonalis
** †Thedusia ventricosa
* †Thigriffides
** †Thigriffides roundyi
* †Thuroholia
** †Thuroholia cribriformis
* †Timaniella
** †Timaniella pseudocamerata
* †Timanodictya – tentative report
* †Timorina
** †Timorina attenuata
** †Timorina ovata
** †Timorina schuchertensis – type locality for species
* †Timorites
** †Timorites schucherti – or unidentified comparable form
** †Timorites uddeni – type locality for species
* †Tingia
* †Tinsleya – type locality for genus
** †Tinsleya texana – type locality for species
* †Tomicosaurus – report made of unidentified related form or using admittedly obsolete nomenclature
* †Toomeyospongia – type locality for genus
** †Toomeyospongia apachensis – type locality for species
** †Toomeyospongia gigantia – type locality for species
** †Toomeyospongia modica – type locality for species
* †Toomeyospongiella – type locality for genus
** †Toomeyospongiella minuta – type locality for species
* †Tornquistia – tentative report
** †Tornquistia transversalis – type locality for species
* †Torynechus
** †Torynechus alectorius
** †Torynechus caelatus – type locality for species
* †Tostonia
* †Trabeculites – type locality for genus
** †Trabeculites keithae – type locality for species
* †Trachydomia
** †Trachydomia turbonitella – type locality for species
* †Trailospongia – type locality for genus
** †Trailospongia reischi – type locality for species
* †Transennatia
** †Transennatia gratiosa
* †Trepospira
** †Trepospira depressa
** †Trepospira discoidalis
** †Trepospira illinoisensis
** †Trepospira sphaerulata
* †Trepsipleura – type locality for genus
** †Trepsipleura chordanodosa – type locality for species
** †Trepsipleura nodosa – type locality for species
* †Trichasaurus – type locality for genus
** †Trichasaurus texensis – type locality for species
* †Tricoria
** †Tricoria hirpex
* †Tricrepicephalus
** †Tricrepicephalus coria
** †Tricrepicephalus texanus
* †Trigonoglossa
** †Trigonoglossa nebrascensis
* †Trigonoproductus
** †Trigonoproductus inexpectans
* Fossilized skull of the Permian amphibian Trimerorhachis †Trimerorhachis
** †Trimerorhachis greggi – type locality for species
** †Trimerorhachis insignis – type locality for species
** †Trimerorhachis mesops – type locality for species
** †Trimerorhachis rogersi – type locality for species
* †Triproetus
** †Triproetus altasulcus – type locality for species
** †Triproetus angustus – type locality for species
** †Triproetus tumidus – type locality for species
* †Tristratocoelia
** †Tristratocoelia rhythmica
* †Triticites
** †Triticites cellamagnus – or unidentified comparable form
* †Trochilioceras – type locality for genus
** †Trochilioceras tenuosum – type locality for species
* Shell in multiple views of a Trochus top sea snail Trochus – report made of unidentified related form or using admittedly obsolete nomenclature
* †Trophisina
** †Trophisina fenaria
* †Tropidelasma
** †Tropidelasma anthicum – type locality for species
** †Tropidelasma corniculum
** †Tropidelasma costellatum – type locality for species
** †Tropidelasma culmenatum
** †Tropidelasma furcillatum
** †Tropidelasma gregarium – type locality for species
** †Tropidelasma perattenuatum – type locality for species
** †Tropidelasma pygmaeum – type locality for species
** †Tropidelasma rhamphodes – type locality for species
** †Tropidelasma robertsi
** †Tropidelasma strobilum – type locality for species
** †Tropidelasma undulatum – type locality for species
* Trypetesa
** †Trypetesa caveata
* †Tschernyschewia
** †Tschernyschewia americana
* †Tuberitina
* †Tumulites
** †Tumulites varians – or unidentified comparable form
* †Tunstallia – report made of unidentified related form or using admittedly obsolete nomenclature
** †Tunstallia helicina – tentative report
* Turbo – report made of unidentified related form or using admittedly obsolete nomenclature
** †Turbo guadalupensis – type locality for species
** †Turbo texanus – type locality for species
* †Turgidiffia – type locality for genus
** †Turgidiffia columellata – type locality for species
** †Turgidiffia completa – type locality for species
** †Turgidiffia composita – type locality for species
* †Tylothyris
** †Tylothyris brevaurita – type locality for species
** †Tylothyris missouriensis – or unidentified comparable form

## U

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Uddenites – type locality for genus
** †Uddenites harlani – type locality for species
** †Uddenites oweni – type locality for species
** †Uddenites schucherti – type locality for species
** †Uddenites serratus – type locality for species
* †Uddenoceras
** †Uddenoceras oweni
* †Ullmannia
* †Ulocrinus
* †Ulrichotrypa – tentative report
* †Uncinuloides
** †Uncinuloides guadalupensis
* †Undellaria
** †Undellaria magnifica
* †Undulella
** †Undulella guadalupensis
** †Undulella matutina
** †Undulella undulata – type locality for species

## V

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Mounted fossilized skeleton of the Permian synapsid (mammal precursor) Varanops †Varanops
** †Varanops brevirostris – type locality for species
* †Varanosaurus – type locality for genus
** †Varanosaurus acutirostris – type locality for species
** †Varanosaurus wichitaensis – type locality for species
* †Varialepis – report made of unidentified related form or using admittedly obsolete nomenclature
* †Vesicaspora
** †Vesicaspora schaubergeri
* Restoration of the Permian trilobite Vidria †Vidria
** †Vidria vespa
* †Vidrioceras
** †Vidrioceras irregulare – type locality for species
** †Vidrioceras uddeni – type locality for species
* †Virgola
** †Virgola neptunia
** †Virgola rigida
* †Voiseyella
** †Voiseyella texana – type locality for species
* †Vorticina
** †Vorticina keytei – type locality for species

## W

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Waagenella
** †Waagenella crassus
** †Waagenella lineatus – type locality for species
** †Waagenella plummeri – type locality for species
* †Waagenina
** †Waagenina rothi – type locality for species
* †Waagenoceras
** †Waagenoceras dieneri
* †Waagenoconcha
** †Waagenoconcha convexa
** †Waagenoconcha leonardensis – type locality for species
** †Waagenoconcha magnifica – type locality for species
** †Waagenoconcha platys
** †Waagenoconcha prophetica
** †Waagenoconcha sulcata
* †Waggoneria – type locality for genus
** †Waggoneria knoxensis – type locality for species
* Fossilized foliage of the Carboniferous-Permian conifer Walchia †Walchia
** †Walchia piniformis
** †Walchia schlotheimii
** †Walchia schneideri
* †Walchiostrobus
* †Walliserodus
* †Warthia
** †Warthia americana – type locality for species
** †Warthia angustior – type locality for species
** †Warthia crassus – type locality for species
** †Warthia fissus – type locality for species
** †Warthia saundersi – type locality for species
** †Warthia waageni – type locality for species
** †Warthia welleri
* †Wattia – type locality for genus
** †Wattia texana – type locality for species
* †Wellerella
** †Wellerella bidentata
** †Wellerella girtyi – type locality for species
** †Wellerella nitidula
** †Wellerella osagensis
* †Wellerites – type locality for genus
** †Wellerites mohri – type locality for species
* †Whitspakia
** †Whitspakia schucherti
* †Wiedeyoceras
** †Wiedeyoceras pingue
* †Wilbernicyathus
** †Wilbernicyathus donegani
* †Wilkingia
** †Wilkingia dubium – or unidentified comparable form
** †Wilkingia rothi
** †Wilkingia terminale
* †Woosteroceras
** †Woosteroceras cherokeense
** †Woosteroceras flexiseptatum – type locality for species
** †Woosteroceras percurvatum – type locality for species
** †Woosteroceras spirale – type locality for species
* †Worthenia
** †Worthenia alticarinata – type locality for species
** †Worthenia arizonensis
** †Worthenia bialveozona
** †Worthenia bicarinata – type locality for species
** †Worthenia corrugata
** †Worthenia crenulata
** †Worthenia kingi – type locality for species
** †Worthenia latialveozona
** †Worthenia pilula – type locality for species
** †Worthenia planalveozona
** †Worthenia speciosa
** †Worthenia tabulata
** †Worthenia whitehorsensis – type locality for species
* †Wortheniopsis
* †Wurmiella
** †Wurmiella excavata

## X

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Restoration of the Late Devonian–Triassic freshwater shark Xenacanthus †Xenacanthus
** †Xenacanthus platypternus
** †Xenacanthus texensis
* †Xenechinus – type locality for genus
** †Xenechinus parvus – type locality for species
* †Xenelasma
** †Xenelasma synthrophioides
* †Xenosaria
** †Xenosaria exotica
* †Xenosteges – type locality for genus
** †Xenosteges adherens – type locality for species
** †Xenosteges anomalus
** †Xenosteges magnus
** †Xenosteges quadratus – type locality for species
** †Xenosteges trivialis
** †Xenosteges umbonatus
* †Xestosia – type locality for genus
** †Xestosia obsolescens
** †Xestosia schucherti – type locality for species
* †Xinjiangospira
** †Xinjiangospira type locality for species – informal
* Illustration of a fossil of the Carboniferous millipede Xyloiulus †Xyloiulus – tentative report

## Y

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Yakovlevia
** †Yakovlevia anterospinosa
** †Yakovlevia costellata
** †Yakovlevia hessorum
** †Yakovlevia immatura
** †Yakovlevia indentata
** †Yakovlevia intermedia
** †Yakovlevia multistriata
** †Yakovlevia sulcata
* †Yochelsonellisa
** †Yochelsonellisa eximia
* Yoldia – tentative report
** †Yoldia subscitula
* †Yunnania

## Z

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Zaphrenthis
** †Zaphrenthis gibsoni
* Life restoration of the Permian amphibian Zatrachys †Zatrachys
** †Zatrachys conchigerus – type locality for species
** †Zatrachys serratus
* †Zeilleropteris
** †Zeilleropteris wattii – type locality for species
* †Zhonglupuceras
** †Zhonglupuceras mapesi
* †Zygopleura
** †Zygopleura swalloviana – type locality for species
* †Zygospira
** †Zygospira resupinata