# List of the Paleozoic life of Illinois

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

## A

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* 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
* †Acantherpestes
** †Acantherpestes inequalis – type locality for species
** †Acantherpestes major – type locality for species
* †Acanthoparypha
** †Acanthoparypha subcircularis
* †Acanthopecten
** †Acanthopecten carboniferus
* †Acanthotriletes
** †Acanthotriletes aculeolatus
** †Acanthotriletes dimorphus
* †Achatella
** †Achatella katharina
* †Acrocrinus
** †Acrocrinus constrictus
* †Actinoceras
* †Actinopteria
** †Actinopteria boydi
* †Adeloblatta
** †Adeloblatta columbiana – type locality for species
** †Adeloblatta sellardsi
* †Adeloneura – type locality for genus
** †Adeloneura thompsoni – type locality for species
* †Adiaphtharsia – type locality for genus
** †Adiaphtharsia ferrea – type locality for species
* †Adiphlebia – type locality for genus
** †Adiphlebia lacoana – type locality for species
* †Adolarryia – type locality for genus
** †Adolarryia bairdi – type locality for species
* †Aenigmatodes – type locality for genus
** †Aenigmatodes danielsi – type locality for species
* †Aetophlebia – type locality for genus
** †Aetophlebia singularis – type locality for species
* †Agogoblattina
** †Agogoblattina occidua – type locality for species
* †Ahrenisporites
** †Ahrenisporites guerickei
* †Ahrensisporites
** †Ahrensisporites guerickei
* †Alanympha – type locality for genus
** †Alanympha richardsoni – type locality for species
* †Alatisporites
** †Alatisporites hexalatus
** †Alatisporites punctatus
** †Alatisporites trialatus
* Fossilized fronds of the Carboniferous-Early Cretaceous seed fern Alethopteris †Alethopteris
** †Alethopteris decurrens
** †Alethopteris lonchitica
** †Alethopteris owenii
** †Alethopteris serlii
* †Allagecrinus
** †Allagecrinus mccraneyensis – type locality for species
* †Alloiopteris
** †Alloiopteris gracillima
** †Alloiopteris quercifolia – or unidentified comparable form
** †Alloiopteris sternbergi
* †Allosocrinus
** †Allosocrinus bronaughi
* †Amarixys
** †Amarixys gracilis – type locality for species
** †Amarixys stellaris – type locality for species
** †Amarixys sulcata – type locality for species
* †Amaurotoma
** †Amaurotoma leavenworthana
* †Ambocoelia
** †Ambocoelia louisianaensis
** †Ambocoelia minuta
* †Ambonychia – tentative report
* †Ametretus – type locality for genus
** †Ametretus laevis – type locality for species
* †Ameura
* †Amousus – type locality for genus
** †Amousus mazonus – type locality for species
* Life restoration of the Carboniferous amphibian Amphibamus †Amphibamus – type locality for genus
** †Amphibamus grandiceps – type locality for species
* †Amphicoelia
* †Amphilichas
** †Amphilichas subdisjunctus
* †Amphiscapha
** †Amphiscapha subrugosa
* †Amplexizaphrentis
** †Amplexizaphrentis spinulosus
* †Amynilyspes – type locality for genus
** †Amynilyspes wortheni – type locality for species
* †Anaphragma
** †Anaphragma mirabile
* †Anapiculatisporites
** †Anapiculatisporites grundensis
** †Anapiculatisporites spinosus
* †Anastrophia
* †Anegertus – type locality for genus
** †Anegertus cubitalis – type locality for species
* †Anematina
** †Anematina proutana
* †Anepitedius – type locality for genus
** †Anepitedius giraffa – type locality for species
* Fossil of the Carboniferous horsetail relative Annularia †Annularia
** †Annularia asteris – or unidentified comparable form
** †Annularia cuspidata
** †Annularia stellata
** †Annularia vernensis – or unidentified comparable form
* †Anobasicrinus
** †Anobasicrinus brevis – type locality for species
* †Anomphalus – type locality for genus
** †Anomphalus rotulus – type locality for species
* †Anthracoceras
** †Anthracoceras wanlessi – type locality for species
* †Anthracophausia
** †Anthracophausia ingelsorum
* †Anthracoscorpio – tentative report
* †Anthracospirifer
** †Anthracospirifer leidyi
* †Anthracothremma – type locality for genus
** †Anthracothremma robusta – type locality for species
* †Anthrakoris – type locality for genus
** †Anthrakoris aetherius – type locality for species
* †Antiquatonia
** †Antiquatonia portlockianus – or unidentified comparable form
* †Antirhynchonella
** †Antirhynchonella ventricosa – or unidentified comparable form
* †Aphantomartus
** †Aphantomartus pustulatus – type locality for species
* †Apiculatasporites
** †Apiculatasporites latigranifer
** †Apiculatasporites setulosus
** †Apiculatasporites spinososaetosus
** †Apiculatasporites variocorneus
** †Apiculatasporites variusetosus
* †Apiculatisporites
** †Apiculatisporites abditus
** †Apiculatisporites frequentisporites
** †Apiculatisporites lappites
** †Apiculatisporites setulosus
* †Apithanus – type locality for genus
** †Apithanus jocularis – type locality for species
* †Apographiocrinus
** †Apographiocrinus typicalis
* †Archaeocalamites
** †Archaeocalamites radiatus
* †Archaeocalyptocrinus
** †Archaeocalyptocrinus obconicus
* †Archaeocidaris – tentative report
* †Archaeologus – type locality for genus
** †Archaeologus falcatus – type locality for species
* †Archaeopteris
** †Archaeopteris stricta
* Fossils of the Carboniferous-Permian bryozoan Archimedes †Archimedes
** †Archimedes communis
** †Archimedes compactus
** †Archimedes invaginatus
** †Archimedes lativolvis
** †Archimedes macfarlani
** †Archimedes swallovanus
** †Archimedes terebriformis
* †Archimylacris
** †Archimylacris paucinervis – type locality for species
* †Archisymplectes – type locality for genus
** †Archisymplectes rhothon – type locality for species
* †Architarbus – type locality for genus
** †Architarbus minor – type locality for species
** †Architarbus rotundatus – type locality for species
* †Archiulus – tentative report
** †Archiulus glomeratus – type locality for species
* †Archoblattina – type locality for genus
** †Archoblattina beecheri – type locality for species
** †Archoblattina scudderi – type locality for species
* †Arctinurus
** †Arctinurus boltoni
** †Arctinurus chicagoensis
* †Argentiproductus
** †Argentiproductus auriculatus
* Illustration of a fossil of the Carboniferous-Permian spider Arthrolycosa. Charles Emerson Beecher (1889). †Arthrolycosa – type locality for genus
** †Arthrolycosa antiqua – type locality for species
** †Arthrolycosa danielsi – type locality for species
* †Arthropitys
** †Arthropitys communis
* †Artisia
** †Artisia transversa
* †Asemoblatta
** †Asemoblatta danielsi – type locality for species
** †Asemoblatta mazona – type locality for species
* †Asinomphalus
** †Asinomphalus antiqua
* †Asolanus
** †Asolanus camptotaenia
* †Astartella
** †Astartella compacta
** †Astartella concentrica
* †Asterophyllites
** †Asterophyllites equisetiformis – or unidentified comparable form
** †Asterophyllites longifolius
** †Asterophyllites multifolia
* †Asterotheca
** †Asterotheca miltoni – or unidentified comparable form
* †Astraeospongium
* †Asyncritus – type locality for genus
** †Asyncritus reticulatus – type locality for species
* †Athyris
** †Athyris vittata
* Fossilized shell of the Late Ordovician-Carboniferous brachiopod Atrypa †Atrypa
** †Atrypa putilla
** †Atrypa reticularis – report made of unidentified related form or using admittedly obsolete nomenclature
* †Aulacotheca
* †Aulertupus – type locality for genus
** †Aulertupus tembrocki – type locality for species
* †Aviculopecten
** †Aviculopecten fasciculatus
* † Avonia
** †Avonia pyidata
* †Axiodeaneia
** †Axiodeaneia glenparkensis
* †Axiologus – type locality for genus
** †Axiologus thoracicus – type locality for species

## B

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
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* W
* X
* Y
* Z
* †Balteosporites
** †Balteosporites minutus
* †Bandringa – type locality for genus
** †Bandringa herdinae – type locality for species
** †Bandringa rayi – type locality for species
* †Bassleroceras
** †Bassleroceras lasallense
* †Baylea
** †Baylea minuta – type locality for species
** †Baylea sinuatus – type locality for species
** †Baylea subconstricta – type locality for species
* †Beecheria
** †Beecheria illinoisense
** †Beecheria paraplicata
* †Belemnospongia
** †Belemnospongia parmula
* Fossilized shell of the Silurian-Early Triassic mollusc Bellerophon †Bellerophon
** †Bellerophon chesterensis – type locality for species
** †Bellerophon incomptus – type locality for species
** †Bellerophon spergensis
** †Bellerophon stevensianus
** †Bellerophon tenuilineata – type locality for species
* †Belinurus
** †Belinurus lacoei – type locality for species
* †Bembexia
** †Bembexia gradilispira – type locality for species
* †Beyrichiella
** †Beyrichiella confluens
* †Bicarina
** †Bicarina petilitornata
* †Bighornia
** †Bighornia patella – or unidentified comparable form
* †Bizarrea – type locality for genus
** †Bizarrea obscura – type locality for species
* †Blattoidea
** †Blattoidea anceps – type locality for species
** †Blattoidea carri – type locality for species
** †Blattoidea melanderi
** †Blattoidea schuchertiana – type locality for species
** †Blattoidea sellardsiana – type locality for species
* †Brabeocrinus – type locality for genus
** †Brabeocrinus christinae – type locality for species
* †Brachycycloceras
** †Brachycycloceras normale
* Life restoration of the Carboniferous amphibian Brachydectes †Brachydectes
** †Brachydectes newberryi
* †Brachythyris
** †Brachythyris hortonensis
* †Brevilamnulella – tentative report
** †Brevilamnulella thebesensis
* †Bucania
** †Bucania batchtownensis – type locality for species
* †Bulimorpha
** †Bulimorpha minor
** †Bulimorpha whitfieldi – type locality for species
* †Bumastoides
** †Bumastoides billingsi
* Fossil of the Early Ordovician-Silurian trilobite Bumastus †Bumastus
** †Bumastus armata
** †Bumastus armatus – or unidentified comparable form
** †Bumastus chicagoensis
** †Bumastus cuniculus – or unidentified comparable form
** †Bumastus graftonensis
** †Bumastus insignis
** †Bumastus springfieldensis
** †Bumastus transversalis
* †Buthiscorpius
** †Buthiscorpius lemayi – type locality for species

## C

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
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* W
* X
* Y
* Z
* †Cacurgus – type locality for genus
** †Cacurgus spilopterus – type locality for species
* †Cadiospora
** †Cadiospora fithiana
** †Cadiospora magna
* Fossilized stems from the Carboniferous-Permian horsetail relative Calamites †Calamites
** †Calamites cistiiformis – or unidentified comparable form
** †Calamites rectangularis
** †Calamites suckowii
* †Calamocarpon
** †Calamocarpon insignis
* †Calamodendron
** †Calamodendron americanum
* †Calamospora
** †Calamospora breviradiata
** †Calamospora flava
** †Calamospora flexilis
** †Calamospora hartungiana
** †Calamospora liquida
** †Calamospora minuta
** †Calamospora mutabilis
** †Calamospora pedata
** †Calamospora straminea
* †Calamostachys
** †Calamostachys americana
** †Calamostachys andanensis
** †Calamostachys inversibractis – type locality for species
* †Calceocrinus
* †Calliasterella
** †Calliasterella americana
* †Calliocrinus
** †Calliocrinus cornatus
** †Calliocrinus cornutus
** †Calliocrinus pentangularis
* Fossilized fronds of the Carboniferous seed fern Callipteridium †Callipteridium
* †Calvinia
** †Calvinia edgewoodensis
* †Calymene
** †Calymene breviceps
** †Calymene celebra
* †Calyptaulax
** †Calyptaulax callicephala
* †Camarophorella
** †Camarophorella buckleyi – or unidentified comparable form
* †Camarotoechia
* †Camerella
* †Camptotriletes
** †Camptotriletes bucculentus
** †Camptotriletes triangularis
* †Cancrinella
** †Cancrinella boonensis
* †Cannophyllites
** †Cannophyllites abbreviata
** †Cannophyllites dawsoni
** †Cannophyllites fasciculata
** †Cannophyllites marginata
** †Cannophyllites rectinervis
** †Cannophyllites southwelli
* †Carbonocoryphe
** †Carbonocoryphe planucauda
* †Carbonympha – type locality for genus
** †Carbonympha herdinai – type locality for species
* †Cardiocarpon
* †Cardiopteridium
* †Cardiothyris
** †Cardiothyris pristina
* †Carpocrinus
* †Caryocrinites
** †Caryocrinites ornatus – or unidentified comparable form
* Life restoration of the Carboniferous Chimaera relative Caseodus †Caseodus
** †Caseodus basalis – type locality for species
* †Catadyesthus
** †Catadyesthus priscus
* †Caulopteris
* †Cephalerpeton – type locality for genus
** †Cephalerpeton ventriarmatum – type locality for species
* †Ceratiocaris
** †Ceratiocaris markhami
* †Ceratocephala
** †Ceratocephala goniata
* †Ceraurinella
** †Ceraurinella tenuisculptus
* †Ceraurinus
** †Ceraurinus platycanthus
* †Cerauromerus
** †Cerauromerus hydei
* Fossil of the Middle-Late Ordovician trilobite Ceraurus †Ceraurus
** †Ceraurus globulobatus
** †Ceraurus pleurexanthemus
* †Cervifurca
** †Cervifurca nasuta
* †Chaenomya
* †Chaetetes
* †Cheirurus
** †Cheirurus niagarensis – or unidentified comparable form
** †Cheirurus patens
* †Cheliphlebia – type locality for genus
** †Cheliphlebia carbonaria – type locality for species
** †Cheliphlebia mazona – type locality for species
* †Chenilleophycus
** †Chenilleophycus godfreyensis
* †Chicagocrinus
** †Chicagocrinus ornatus
* †Chirodus
** †Chirodus orbicularis
* †Chlidonocrinus
** †Chlidonocrinus erectus – type locality for species
* †Chlidophorus
* †Chonetes
** †Chonetes ornatus
* †Chonetinella
* †Chrestotella
** †Chrestotella danae – type locality for species
* †Chrestotes – type locality for genus
** †Chrestotes lapidea – type locality for species
* †Cirratriradites
** †Cirratriradites annulatus
** †Cirratriradites annuliformis
** †Cirratriradites tenuis
* †Clathrocrinus – type locality for genus
** †Clathrocrinus clathratus – type locality for species
** †Clathrocrinus clinatus – type locality for species
* †Clathrodictyon
** †Clathrodictyon vesiculosum
* †Clathrospira
** †Clathrospira subconica
* Fossilized shell of the Middle Devonian-Permian brachiopod Cleiothyridina †Cleiothyridina
** †Cleiothyridina atrypoides
** †Cleiothyridina sublamellosa
* †Clepsydrops – type locality for genus
** †Clepsydrops collettii – type locality for species
** †Clepsydrops vinslovii – type locality for species
* †Cliftonia
** †Cliftonia tubulistriata
* †Clonocrinus
** †Clonocrinus chicagoensis
** †Clonocrinus niagarensis
* Life restoration (foreground) of the Permian-Jurassic lobe-finned fish Coelacanthus †Coelacanthus
** †Coelacanthus exiguus
* †Coelocystis
** †Coelocystis subglobosus
* †Columinisporites
** †Columinisporites ovalis
* †Complexisporites
** †Complexisporites chalonerii
* †Composita
** †Composita argentea
** †Composita matutina
** †Composita subtilita
** †Composita trinuclea
* †Compsaster
** †Compsaster formosus
* †Condrathyris
** †Condrathyris perplexa
* †Conocardium
** †Conocardium chesterensis – type locality for species
* †Contocrinus
** †Contocrinus coupi – type locality for species
* †Converrucosisporites
** †Converrucosisporites subverrucosus
* †Convolutispora
** †Convolutispora florida
** †Convolutispora fromensis
* †Cooperoceras
* †Cordaianthus
* †Cordaicarpus
* †Cordaicladus
* Fossilized foliage of the Carboniferous-Permian conifer relative Cordaites †Cordaites
** †Cordaites communis
** †Cordaites principalis
* †Cornulites
* †Corynepteris
** †Corynepteris erosa – or unidentified comparable form
* †Crania
** †Crania dodgei
* †Craniops
* †Crassiproetus
** †Crassiproetus occidens
* †Crassispora
** †Crassispora kosankei
** †Crassispora plicata
* Fossilized skeleton of the Carboniferous-Permian reptile relative Cricotus †Cricotus – type locality for genus
** †Cricotus heteroclitus – type locality for species
* †Cristatisporites
** †Cristatisporites alpernii
** †Cristatisporites indignabundus
* †Crossotheca
* †Crotalocrinites
** †Crotalocrinites cora
** †Crotalocrinites vanhornei
* †Crurithyris
** †Crurithyris levicula – or unidentified comparable form
** †Crurithyris planoconvexa
* †Cryptothyrella
** †Cryptothyrella ovoides
* Fossil of the Carboniferous shark Ctenacanthus †Ctenacanthus
** †Ctenacanthus buttersi – type locality for species
* †Ctenodonta
** †Ctenodonta concinna
* †Curculioides
** †Curculioides gigas – type locality for species
** †Curculioides mcluckiei – type locality for species
** †Curculioides scaber – type locality for species
* †Curriella – tentative report
* †Cyathocrinites
* †Cyclites
** †Cyclites globosa – type locality for species
* †Cyclogranisporites
** †Cyclogranisporites aureus
** †Cyclogranisporites breviradiata
** †Cyclogranisporites breviradiatus
** †Cyclogranisporites leopoldi
** †Cyclogranisporites micaceus
** †Cyclogranisporites microgranus
** †Cyclogranisporites minutus
** †Cyclogranisporites obliquus
** †Cyclogranisporites orbicularis
** †Cyclogranisporites staplini
* †Cyclonema
** †Cyclonema daytonensis
** †Cyclonema intermedium
* †Cyclus
** †Cyclus americanus – type locality for species
* †Cymatospira
** †Cymatospira welleri
* †Cyperites
* †Cyphaspis
** †Cyphaspis globosus
** †Cyphaspis intermedia
* †Cyphocrinus
** †Cyphocrinus chicagoensis
* †Cypricardella
** †Cypricardella bellistriata
* †Cyrtia
* Restoration of the Cambrian-Middle Devonian nautiloid cephalopod Cyrtoceras †Cyrtoceras
* Cytherella
** †Cytherella glandella
* †Cytherellina
* †Cytherodon – tentative report
** †Cytherodon appresus
* †Cytocrinus

## D

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
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* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Dabasacanthus – type locality for genus
** †Dabasacanthus inskasi – type locality for species
* †Dactylotheca
** †Dactylotheca aspera
* †Dalejina
* †Dalmanella
** †Dalmanella edgewoodensis
* Fossil of the Late Ordovician-Middle Devonian trilobite Dalmanites †Dalmanites
** †Dalmanites danai
** †Dalmanites illinoisensis
** †Dalmanites obex
** †Dalmanites platycaudatus
* †Danielsiella – type locality for genus
** †Danielsiella priscula – type locality for species
* †Dasciocrinus
** †Dasciocrinus spinifer
* †Dasyleptus
* †Dawsonoceras
* †Decoroproetus
* †Deiphon
** †Deiphon americanus
* †Delicaster – type locality for genus
** †Delicaster enigmaticus
* †Delthyris
* †Deltoidospora
** †Deltoidospora levis
** †Deltoidospora priddyi
** †Deltoidospora sphaerotriangula
* †Denayella
** †Denayella rotalia – or unidentified comparable form
* †Densosporites
** †Densosporites annulatus
** †Densosporites lobatus – or unidentified comparable form
** †Densosporites ruhus
** †Densosporites sinuosus
** †Densosporites sphaerotriangularis
** †Densosporites triangularis
* †Derbyia
** †Derbyia crassa
* †Derbyoides
** †Derbyoides nebrascensis
* †Desmograptus
** †Desmograptus micronematodes
* †Desmopteris
* †Devonatrypa
* †Devononema – type locality for genus
** †Devononema typicum – type locality for species
* †Diagonodictya – type locality for genus
** †Diagonodictya crusta – type locality for species
* †Diamphidiocystis
** †Diamphidiocystis drepanon
* †Diaphorodendron
** †Diaphorodendron rimosum
* †Diaphragmus
** †Diaphragmus fasciculatus
* †Dicalamophyllum
** †Dicalamophyllum americanum
* †Dichocrinus
** †Dichocrinus nola – type locality for species
* †Dicksonites
* †Dicoelosia
* †Dicranopeltis
** †Dicranopeltis decipiens
* †Dictyoclostus
** †Dictyoclostus inflatus
* †Dictyomonolites
** †Dictyomonolites swadei
* †Dictyonema
** †Dictyonema crassibasale
** †Dictyonema retiforme
** †Dictyonema tenellum
* †Dictyophlois
** †Dictyophlois reticulata var. illinoisensis
* †Dictyotomaria
** †Dictyotomaria depressus – type locality for species
** †Dictyotomaria wortheni – type locality for species
** †Dictyotomaria yochelsoni
* †Dictyotriletes
** †Dictyotriletes bireticulatus
** †Dictyotriletes danvillensis
** †Dictyotriletes densoreticulatus
** †Dictyotriletes distortus
** †Dictyotriletes falsus – or unidentified comparable form
** †Dictyotriletes reticulocingulum – or unidentified comparable form
* †Dictyoxylon – or unidentified comparable form
* †Dieconeura – type locality for genus
** †Dieconeura arcuata – type locality for species
** †Dieconeura mazona – type locality for species
* †Dielasmella
** †Dielasmella compressa
* †Diexodus – type locality for genus
** †Diexodus debilis – type locality for species
* †Dimerocrinites
** †Dimerocrinites occidentalis
** †Dimerocrinites pentangularis
* †Dinobolus
* Fossilized axial skeleton of the Carboniferous-Permian amphibian Diplocaulus †Diplocaulus – type locality for genus
** †Diplocaulus salamandroides – type locality for species
* †Diplothmema
** †Diplothmema cheathami
* †Discotarbus – type locality for genus
** †Discotarbus deplanatus – type locality for species
* †Distortitisporites
** †Distortitisporites illinoiensis
* †Ditomopyge
** †Ditomopyge scitula
* †Dolichoharpes
** †Dolichoharpes uniserialis
* †Domatoceras
** †Domatoceras mattoonense – type locality for species
** †Domatoceras wortheni – type locality for species
* †Donaldina
** †Donaldina americana
** †Donaldina fountainensis – type locality for species
** †Donaldina marigoldensis
** †Donaldina pygmaea – type locality for species
* †Dorycrinus
** †Dorycrinus mississippiensis
* †Dragonympha – type locality for genus
** †Dragonympha srokai – type locality for species
* †Dudleyaspis
** †Dudleyaspis vanhornei

## E

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* M
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* †Echinaria
* †Echinoconchus
** †Echinoconchus alternatus
* Life restoration of the Late Devonian-Carboniferous Chimaera relative Edestus †Edestus
** †Edestus crenulatus – type locality for species
** †Edestus serratus – type locality for species
* †Edmondia
** †Edmondia ovata
* †Eileticus – type locality for genus
** †Eileticus aequalis – type locality for species
** †Eileticus anthracinus – type locality for species
* †Elasmonema
** †Elasmonema corrugata
* †Elaterites
** †Elaterites triferens
* †Elibatocrinus
** †Elibatocrinus elegans – type locality for species
* Fossilized skeleton of the Carboniferous-Permian bony fish Elonichthys †Elonichthys
** †Elonichthys disjunctus – type locality for species
** †Elonichthys peltigerus
** †Elonichthys perpennatus
* †Encrinurus
** †Encrinurus egani
* †Endelocrinus
** †Endelocrinus tumidus
* †Endoiasmus – type locality for genus
** †Endoiasmus reticulatus – type locality for species
* †Endosporites
** †Endosporites globiformis
** †Endosporites plicatus
* †Enoploura
* †Enteletes
** †Enteletes hemiplicata
* †Eoasinites
* †Eobronteus
** †Eobronteus slocomi
* †Eoctonus – type locality for genus
** †Eoctonus miniatus – type locality for species
* †Eodictyonella
* †Eohalysiocrinus – tentative report
* †Eolissochonetes
* †Eomartiniopsis
** †Eomartiniopsis kinderhookensis
* †Eophacops
** †Eophacops handwerki
* †Eoplectodonta
* †Eoscorpius – type locality for genus
** †Eoscorpius carbonarius – type locality for species
* †Eospirifer
** †Eospirifer radiatus
* †Eospirigerina
** †Eospirigerina putilla
* †Eotrochus
** †Eotrochus marigoldensis
* †Ephippioceras
** †Ephippioceras moinellae – type locality for species
* †Epideigma – type locality for genus
** †Epideigma elegans – type locality for species
* †Eremopteris
** †Eremopteris grandis
** †Eremopteris inaequilateralis
* †Erisocrinus
** †Erisocrinus typus
* †Erratencrinurus
** †Erratencrinurus vigilans
* †Escharopora
** †Escharopora patens
* †Eubleptus – type locality for genus
** †Eubleptus danielsi – type locality for species
** †Eubleptus maculosus – type locality for species
* †Eubrodia – type locality for genus
** †Eubrodia dabasinskasi – type locality for species
* †Eucaenus – type locality for genus
** †Eucaenus ovalis – type locality for species
** †Eucaenus pusillus – type locality for species
** †Eucaenus rotundatus – type locality for species
* Fossilized calyx of the Silurian-Middle Devonian crinoid ("sea lily") Eucalyptocrinites †Eucalyptocrinites
** †Eucalyptocrinites asper
** †Eucalyptocrinites crassus
** †Eucalyptocrinites depressus
** †Eucalyptocrinites egani
** †Eucalyptocrinites inornatus
** †Eucalyptocrinites ornatus
** †Eucalyptocrinites rotundus
* †Euchondria
** †Euchondria levicula
* †Euconospira
** †Euconospira sturgeoni
** †Euconospira waterlooensis – type locality for species
* †Eudoxina
** †Eudoxina subrotunda
* †Euhydrodiskos – type locality for genus
** †Euhydrodiskos diktyotos – type locality for species
* †Eumetria
** †Eumetria vera
* †Eumicrerpeton – type locality for genus
** †Eumicrerpeton parvum – type locality for species
* †Eunema
** †Eunema centralis – type locality for species
** †Eunema fasciata – type locality for species
* Fossilized shell of the Silurian-Permian sea snail Euomphalus †Euomphalus
** †Euomphalus planodorsatus
** †Euomphalus similis
* †Euonychocrinus
** †Euonychocrinus simplex – type locality for species
* †Euphemerites
** †Euphemerites affinis – type locality for species
** †Euphemerites gigas – type locality for species
** †Euphemerites simplex – type locality for species
* †Euphemites
** †Euphemites callosus – type locality for species
** †Euphemites carbonarius
** †Euphemites lentiformis – type locality for species
** †Euphemites randolphensis – type locality for species
* Illustration of fossil of the Carboniferous millipede Euphoberia †Euphoberia – type locality for genus
** †Euphoberia anguilla – type locality for species
** †Euphoberia armigera – type locality for species
** †Euphoberia carri – type locality for species
** †Euphoberia cuspidata – type locality for species
** †Euphoberia flabellata – type locality for species
** †Euphoberia granosa
** †Euphoberia horrida – type locality for species
** †Euphoberia hystricosa – type locality for species
** †Euphoberia simplex – type locality for species
** †Euphoberia spinulosa – type locality for species
** †Euphoberia tracta – type locality for species
* †Euryzone
** †Euryzone latitornata
* †Eusphenopteris
** †Eusphenopteris morrowensis
* †Exallaspis
** †Exallaspis illinoisensis
* †Exocrinus
** †Exocrinus wanni
* †Exoriocrinus – type locality for genus
** †Exoriocrinus lasallensis

## F

* A
* B
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* D
* E
* F
* G
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* M
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* †Fasciculiconcha
** †Fasciculiconcha knighti
* Fossil of the Late Ordovician-Permian tabulate coral Favosites †Favosites
* †Fenestella
* †Ferganella
* †Fistulipora
** †Fistulipora excellens
** †Fistulipora incrustans
** †Fistulipora perdensa
* †Fletcheria
* †Florinites
** †Florinites antiquus
** †Florinites grandis
** †Florinites mediapudens
** †Florinites mediaudens
** †Florinites millotti
** †Florinites similis
** †Florinites triletus
** †Florinites visendus
** †Florinites volans
* †Fraipontia
** †Fraipontia bella – type locality for species

## G

* A
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* E
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* L
* M
* N
* O
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* S
* T
* U
* V
* W
* X
* Y
* Z
* †Galateacrinus
** †Galateacrinus coacervatus – type locality for species
* †Gazacrinus
** †Gazacrinus major
** †Gazacrinus minor
* †Genentomum – type locality for genus
** †Genentomum validum – type locality for species
* †Geralinura
** †Geralinura carbonaria – type locality for species
* †Gerapompus
** †Gerapompus blattinoides – type locality for species
** †Gerapompus extensus – type locality for species
** †Gerapompus schucherti – type locality for species
* †Geraroides
** †Geraroides maximus – type locality for species
* †Gerarulus – type locality for genus
** †Gerarulus radialis – type locality for species
* †Gerarus – type locality for genus
** †Gerarus collaris – type locality for species
** †Gerarus constrictus – type locality for species
** †Gerarus danielsi – type locality for species
** †Gerarus mazonus – type locality for species
** †Gerarus vetus – type locality for species
* †Geratarbus – type locality for genus
** †Geratarbus lacoei – type locality for species
* †Gigantopteris
** †Gigantopteris dawsoni
** †Gigantopteris ovata
* †Girtyella
** †Girtyella indianensis
* †Girtyspira
** †Girtyspira canaliculata
** †Girtyspira pygmaea – type locality for species
* †Gissocrinus
* †Glabrocingulum
** †Glabrocingulum chesterensis
** †Glabrocingulum grayvillense
* †Glaphyrophlebia – type locality for genus
** †Glaphyrophlebia pusilla – type locality for species
* Fossilized tooth of the Carboniferous shark Glikmanius †Glikmanius
** †Glikmanius occidentalis
* †Globozyga
** †Globozyga tenuistriata
* †Glyptambon
** †Glyptambon verrucosus
* †Glyptopleura
** †Glyptopleura costata
* †Gomphocystites
* †Gondolella
** †Gondolella pohli
* †Gonioloboceras
** †Gonioloboceras parrishi – type locality for species
* †Goniophora – tentative report
* †Gosseletina
** †Gosseletina johnsoni
** †Gosseletina subglobosa
* †Grabauphyllum
** †Grabauphyllum johnstoni
* †Graeophonus
** †Graeophonus scudderi – type locality for species
* †Granasporites
** †Granasporites medius
* †Granulatispoites
** †Granulatispoites piroformis
* †Granulatisporites
** †Granulatisporites adnatoides
** †Granulatisporites granularis
** †Granulatisporites granulatus
** †Granulatisporites livingstonensis
** †Granulatisporites microgranifer
** †Granulatisporites minutus
** †Granulatisporites pallidus
** †Granulatisporites pannosites
** †Granulatisporites parvus – or unidentified comparable form
** †Granulatisporites piroformis
** †Granulatisporites verrucosus
* †Greenops
* Life restoration of the Carboniferous four-limbed animal precursor Greererpeton †Greererpeton
** †Greererpeton burkmorani
* †Griffithidella
** †Griffithidella alternata
** †Griffithidella doris
* †Grumosisporites
** †Grumosisporites rufus – or unidentified comparable form
** †Grumosisporites varioreticulatus
* †Gulpenia
** †Gulpenia limburgensis
* †Gypidula
* †Gyrophlebia – type locality for genus
** †Gyrophlebia longicollis – type locality for species

## H

* A
* B
* C
* D
* E
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* H
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* J
* K
* L
* M
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* O
* P
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* W
* X
* Y
* Z
* †Hadentomum – type locality for genus
** †Hadentomum americanum – type locality for species
* †Hadrachne – type locality for genus
** †Hadrachne horribilis – type locality for species
* †Haeretocrinus
** †Haeretocrinus macoupinesis
** †Haeretocrinus wagneri – type locality for species
* †Hagnocrinus – tentative report
** †Hagnocrinus dubius
* †Hallicystis
** †Hallicystis elongata
* Fossil of the Ordovician bryozoan ("moss animal") Hallopora †Hallopora – tentative report
* †Halogetocrinus – type locality for genus
** †Halogetocrinus paucus
* †Halysites
* †Hamburgia
** †Hamburgia typa
* †Harmostocrinus – type locality for genus
** †Harmostocrinus porosus – type locality for species
* †Harpidella
* †Harpidium
* †Hebertella
* †Hedeina
* †Helenodora – type locality for genus
** †Helenodora inopinata – type locality for species
* †Helicotoma
** †Helicotoma planulata
* †Heliolites
* †Heliomeroides
** †Heliomeroides raymondi
* †Hemeristia – type locality for genus
** †Hemeristia occidentalis – type locality for species
* †Hemiarges
* †Herdina – type locality for genus
** †Herdina mirificus – type locality for species
* †Heslerodus
** †Heslerodus divergens
* †Hesperorthis
* †Heteralosia
** †Heteralosia beecheri
* †Heterologus – type locality for genus
** †Heterologus langfordorum – type locality for species
* †Heterotarbus – type locality for genus
** †Heterotarbus ovatus – type locality for species
* †Hexacrinites
** †Hexacrinites mississippiensis – type locality for species
* †Holcospermum
* †Holia
** †Holia magnaspina
* †Holocystites
** †Holocystites alternatus
** †Holocystites cylindricus
** †Holocystites scutellatus – type locality for species
** †Holocystites spangleri
** †Holocystites sphaericus
* †Homaloneura
** †Homaloneura dabasinskasi – type locality for species
* †Homocrinus – tentative report
* †Homoeospira
* †Homotelus
** †Homotelus laeviurus
* †Howellella
* †Hustedia
** †Hustedia marmoni
* †Hybochilocrinus
** †Hybochilocrinus americanus
* †Hymenospora
** †Hymenospora multirugosa
** †Hymenospora paucirugosa
†Hyolithes
** †Hyolithes striatus
* †Hypergonia
** †Hypergonia baldwinensis
** †Hypergonia illinoiensis – type locality for species
** †Hypergonia marvinwelleri
* †Hypermegethes – type locality for genus
** †Hypermegethes schucherti – type locality for species
* †Hypselocrinus
** †Hypselocrinus maccabei
* †Hystrichopsydrax – type locality for genus
** †Hystrichopsydrax sandersi – type locality for species
* †Hystriculina
** †Hystriculina texana

## I

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* †Ianthinopsis – tentative report
* †Icthyocrinus
** †Icthyocrinus subangularis
* †Illaenoides
** †Illaenoides triloba
* †Ilyodes
** †Ilyodes divisa – type locality for species
** †Ilyodes elongata – type locality for species
* †Indospora
** †Indospora boletus
** †Indospora stewarti
* †Ischadites
** †Ischadites koenigi
* †Isoallagecrinus
** †Isoallagecrinus lasallensis – type locality for species
* Life restoration of the Permian amphibian Isodectes †Isodectes
** †Isodectes obtusus
* †Isorophus – tentative report
* †Isorthis
* †Isotelus
** †Isotelus gigas
** †Isotelus maximus

## J

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* M
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* †Jimpohlia – type locality for genus
** †Jimpohlia erinacea – type locality for species
* †Juresania
** †Juresania symmetrica

## K

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* M
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* †Kanabinocrinus – tentative report
* †Kankakeea – type locality for genus
** †Kankakeea grundyi – type locality for species
* †Kaskia
** †Kaskia chesterensis
* †Kewaneesporites
** †Kewaneesporites reticulatus
** †Kewaneesporites reticuloides
* Fossilized shells of the Middle Ordovician-Permian nautiloid cephalopod Kionoceras †Kionoceras
* †Kitakamithyris
** †Kitakamithyris cooperensis
* †Kloedenella – tentative report
* †Knorria
** †Knorria imbricata – or unidentified comparable form
* †Knoxisporites
** †Knoxisporites rotatus
** †Knoxisporites stephanephorus
** †Knoxisporites triradiatus
* †Kosankeisporites
** †Kosankeisporites elegans
* †Kosovopeltis
* †Kozlowskia
** †Kozlowskia splendens
* †Kozlowskiella
** †Kozlowskiella inexpectata – type locality for species
* †Kronoscorpio
** †Kronoscorpio danielsi – type locality for species
* †Kustarachne – type locality for genus
** †Kustarachne tenuipes – type locality for species
* †Kutorginella
** †Kutorginella lasallensis

## L

* A
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* M
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* †Lacoea
** †Lacoea seriata
* †Laevigatosporites
** †Laevigatosporites desmoinensis
** †Laevigatosporites desmoinesensis
** †Laevigatosporites globosus
** †Laevigatosporites medius
** †Laevigatosporites minutus
** †Laevigatosporites ovalis
** †Laevigatosporites punctatus
** †Laevigatosporites vulgaris
* †Lagenospermum
* †Lameereites – type locality for genus
** †Lameereites curvipennis – type locality for species
* †Lampterocrinus
** †Lampterocrinus inflatus
* †Larryia – type locality for genus
** †Larryia osterbergi – type locality for species
* †Latosporites
** †Latosporites minutus
* Illustration of a fossil of the Carboniferous centipede Latzelia †Latzelia – type locality for genus
** †Latzelia primordialis – type locality for species
* †Laudonocrinus
** †Laudonocrinus subsinuatus
* †Leangella
* †Lecanocrinus
* †Lecthaylus - type locality for genus
** †Lecthaylus gregarius - type locality for species
* †Leiotriletes
** †Leiotriletes adnatoides
** †Leiotriletes atshanensis – or unidentified comparable form
** †Leiotriletes gracilis
** †Leiotriletes levis
** †Leiotriletes notatus
** †Leiotriletes parvus
** †Leiotriletes pseudolevis
* †Lepadocystis
* †Lepetopsis
** †Lepetopsis chesterensis
* †Lepidocarpon
* †Lepidocyclus
* Restoration of the Carboniferous-Late Triassic club moss relative Lepidodendron. Eli Heimans (1911). †Lepidodendron
** †Lepidodendron aculeatum
** †Lepidodendron oblongifolium
** †Lepidodendron veltheimii – or unidentified comparable form
** †Lepidodendron volkmannianum
** †Lepidodendron wortheni
* †Lepidophloios
* †Lepidophylloides
* †Lepidophyllum
** †Lepidophyllum campbelleanum
* †Lepidostrobophyllum
* †Lepidostrobus
* †Leptaena
** †Leptaena aequalis
** †Leptaena rhomboidalis
* †Leptagonia
** †Leptagonia missouriensis – or unidentified comparable form
* †Leptodesma
** †Leptodesma ehlersi – or unidentified comparable form
** †Leptodesma laevis
* †Leptoptygma
** †Leptoptygma fountainensis – type locality for species
** †Leptoptygma golconda
* †Lesleya
** †Lesleya cheimarosa – type locality for species
* †Lichas
** †Lichas pugnax
* Shell of the Cambrian-modern brachiopod Lingula †Lingula
** †Lingula carbonaria
** †Lingula lamellata
* †Linoproductus
** †Linoproductus prattenianus
* †Linopteris
** †Linopteris rubella
* †Liospira – tentative report
* †Liroceras
** †Liroceras liratum
* †Lissatrypa – tentative report
* †Lissochonetes
** †Lissochonetes geinitzianus
* †Lissomartus
** †Lissomartus schucherti – type locality for species
* †Listroncanthus
* †Lithoneura – type locality for genus
** †Lithoneura clayesi – type locality for species
** †Lithoneura lameerei – type locality for species
** †Lithoneura mirifica – type locality for species
** †Lithoneura piecko – type locality for species
* Shell of a Lithophaga, or date mussel Lithophaga – tentative report
** †Lithophaga subelliptica
* †Litostrobus – or unidentified comparable form
** †Litostrobus iowensis
* †Lobeatta – type locality for genus
** †Lobeatta schneideri – type locality for species
* †Lophophyllidium
** †Lophophyllidium proliferum
* †Lophospira
** †Lophospira obliqua
** †Lophospira perangulata
** †Lophospira serrulata
* †Lophotriletes
** †Lophotriletes comissuralis
** †Lophotriletes commissuralis
** †Lophotriletes copiosus
** †Lophotriletes gibbosus
** †Lophotriletes granoornatus – or unidentified comparable form
** †Lophotriletes ibrahimi
** †Lophotriletes microsaetosus
** †Lophotriletes mosaicus
** †Lophotriletes pseudaculeatus
** †Lophotriletes rarispinosus
* †Lycodemas – type locality for genus
** †Lycodemas adolescens – type locality for species
* †Lycospora
** †Lycospora brevijuga
** †Lycospora granulata
** †Lycospora micropapillata
** †Lycospora noctuina
** †Lycospora orbicula
** †Lycospora paulula
** †Lycospora pellucida
** †Lycospora punctata
** †Lycospora pusilla
** †Lycospora rotunda
** †Lycospora subjuga
** †Lycospora torquifer
* †Lyellia
** †Lyellia thebesensis
* †Lygdozoon
** †Lygdozoon arkansana
* †Lyriocrinus
** †Lyriocrinus melissa
* Life restoration of the Permian snake-like amphibian Lysorophus showing speculative egg-coiling behavior †Lysorophus – type locality for genus
** †Lysorophus tricarinatus – type locality for species

## M

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* G
* H
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* L
* M
* N
* O
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* †Macrocrinus
** †Macrocrinus mundulus
* †Macrostylocrinus
** †Macrostylocrinus striatus
** †Macrostylocrinus subglobosus
* †Maculatasporites
** †Maculatasporites punctatus
* †Mammia – type locality for genus
** †Mammia alutacea – type locality for species
* †Mariopteris
** †Mariopteris occidentalis
** †Mariopteris pygmaea
** †Mariopteris sillimanni
** †Mariopteris speciosa
* †Marsupiocrinus
** †Marsupiocrinus chicagoensis
* †Mazoglossus
** †Mazoglossus ramsdelli – type locality for species
* †Mazonia – type locality for genus
** †Mazonia woodiana – type locality for species
* †Mazonopterum – type locality for genus
** †Mazonopterum wolfforum – type locality for species
* †Mazostachys
** †Mazostachys pendulata
* †Mazothairos – type locality for genus
** †Mazothairos enormis – type locality for species
* †Mcluckiepteron – type locality for genus
** †Mcluckiepteron luciae – type locality for species
* †Meekopora
** †Meekopora eximia
* †Meekospira
** †Meekospira bambooformis
** †Meekospira batteni
** †Meekospira evansvillensis
** †Meekospira minuta – type locality for species
* †Megalometer – type locality for genus
** †Megalometer lata – type locality for species
* †Megastrophia
** †Megastrophia profunda
* †Megathentomum – type locality for genus
** †Megathentomum pustulatum – type locality for species
** †Megathentomum scudderi – type locality for species
* †Megistocrinus
* †Melinophlebia – type locality for genus
** †Melinophlebia analis – type locality for species
* †Melocrinites
** †Melocrinites obpyramidalis
* †Merista
* †Meristina
* †Mesoblastus – tentative report
* †Mesolobus
* †Mesoplica
** †Mesoplica mesicostalis – tentative report
* †Metacheliphlebia
** †Metacheliphlebia elongata – type locality for species
* †Metachorus
** †Metachorus testudo – type locality for species
* Fossilized shell of the Carboniferous-Permian nautiloid cephalopod Metacoceras †Metacoceras
** †Metacoceras copei – type locality for species
* †Metaconularia
** †Metaconularia manni
* †Metatarbus – type locality for genus
** †Metatarbus triangularis – type locality for species
* †Metopolichas
** †Metopolichas breviceps
* †Miamia – type locality for genus
** †Miamia bronsoni – type locality for species
* †Microcaracrinus
** †Microcaracrinus conjugulus – type locality for species
* †Microreticulatisporites
** †Microreticulatisporites concavus
** †Microreticulatisporites harrisonii
** †Microreticulatisporites lunatus
** †Microreticulatisporites nobilis
** †Microreticulatisporites sulcatus
* †Milosaurus – type locality for genus
** †Milosaurus mccordi – type locality for species
* †Miobatrachus – type locality for genus
** †Miobatrachus romeri – type locality for species
* †Mischoptera
** †Mischoptera douglassi – type locality for species
* †Modiolopsis
* †Modiomorpha
** †Modiomorpha concentrica
* †Modiomorphella
* Fossils of the Early Devonian graptolite Monograptus †Monograptus
** †Monograptus dubius
** †Monograptus vomerinus
* †Monomuchites
** †Monomuchites annularis
* †Monopteria
** †Monopteria longa
* †Mooreisporites
** †Mooreisporites inusitatus
* †Mooreoceras
* †Moundocrinus
** †Moundocrinus osagensis – or unidentified comparable form
* †Mourlonia
* †Mulceodens
** †Mulceodens sibleyense – or unidentified related form
* †Murchisonia
** †Murchisonia akidota
** †Murchisonia anderdoniae
** †Murchisonia sibleyensis
* †Murospora
** †Murospora kosankei
* †Myelodactylus
* †Mylacris – type locality for genus
** †Mylacris ampla – type locality for species
** †Mylacris anthracophila – type locality for species
** †Mylacris antiqua – type locality for species
** †Mylacris diplodiscus – type locality for species
** †Mylacris sellardsi
** †Mylacris similis – type locality for species
* †Myriotheca
** †Myriotheca arnoldi – type locality for species
** †Myriotheca scaberrima
* †Mysticocrinus – report made of unidentified related form or using admittedly obsolete nomenclature
* †Myxinikela – type locality for genus
** †Myxinikela siroka – 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
* †Nacekomia – type locality for genus
** †Nacekomia rossae – type locality for species
* †Narkema – type locality for genus
** †Narkema taeniatum – type locality for species
* †Naticonema
* Fossilized shell of the Early Devonian – Triassic sea snail Naticopsis †Naticopsis
** †Naticopsis carleyana
** †Naticopsis planifrons
** †Naticopsis waterlooensis – type locality for species
* †Nectoptilus – type locality for genus
** †Nectoptilus mazonus – type locality for species
* †Neilsonia
** †Neilsonia welleri
* †Nemastomoides – type locality for genus
** †Nemastomoides longipes – type locality for species
* †Nemavermes – type locality for genus
** †Nemavermes mackeei – type locality for species
* †Neochonetes
** †Neochonetes granulifer
* †Neofouquea – type locality for genus
** †Neofouquea suzanneae – type locality for species
* †Neospirifer
** †Neospirifer dunbari
** †Neospirifer triplicatus
* Fossilized frond of the Carboniferous seed fern Neuropteris †Neuropteris
** †Neuropteris clarksoni
** †Neuropteris dussarti
** †Neuropteris ovata
** †Neuropteris parvifolia
** †Neuropteris rarinervis
** †Neuropteris scheuchzeri
** †Neuropteris schlehani
** †Neuropteris tennesseeana
** †Neuropteris tenuifolia
* †Nigeroplica
** †Nigeroplica illinoisensis – tentative report
* †Nodonema
** †Nodonema granulatum
* †Nucleospira
** †Nucleospira minima
* Interior of a fossilized shell of the Early Ordovician-modern marine bivalve Nucula Nucula
* †Nuculoidea – tentative report
* †Nuculopsis
** †Nuculopsis girtyi
* †Nummicrinus
** †Nummicrinus waukoma

## 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
* †Odontopteris
* †Oligocarpia
* †Oligotypus
** †Oligotypus makowskii – type locality for species
* †Onychopterella – tentative report
** †Onychopterella pumilis
* †Ootarbus – type locality for genus
** †Ootarbus ovatus – type locality for species
** †Ootarbus pulcher – type locality for species
* †Opiliotarbus
** †Opiliotarbus elongatus – type locality for species
* †Orbiculoidea
** †Orbiculoidea missouriensis
* †Orbinaria
** †Orbinaria brownensis – tentative report
* †Orthomylacris
** †Orthomylacris contorta – type locality for species
** †Orthomylacris gurleyi – type locality for species
** †Orthomylacris mansfieldi
** †Orthomylacris rigida – type locality for species
* †Orthonychia
** †Orthonychia chesterense
* †Orthospirifer
** †Orthospirifer iowensis
* †Orthotarbus
** †Orthotarbus minutus – type locality for species
** †Orthotarbus robustus – type locality for species
* †Otarion
* †Ovatia
** †Ovatia nascens
* †Ovopteris
** †Ovopteris communis
* †Oxynoblatta
** †Oxynoblatta triangularis – type locality for species
* †Oxyprora
** †Oxyprora mesialis – type locality for species
** †Oxyprora prattenanum – 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
* †Pachystrophia – tentative report
* †Palaeobuthus – type locality for genus
** †Palaeobuthus distinctus – type locality for species
* †Palaeocarria – type locality for genus
** †Palaeocarria ornata – type locality for species
* †Palaeodictyopteron – report made of unidentified related form or using admittedly obsolete nomenclature
** †Palaeodictyopteron latipenne – type locality for species
** †Palaeodictyopteron mazonum – type locality for species
* †Palaeolima
** †Palaeolima equistriata
** †Palaeolima retifer
** †Palaeolima retifera
* †Palaeoneilo
** †Palaeoneilo taffiana
* †Palaeopisthacanthus – type locality for genus
** †Palaeopisthacanthus schucherti – type locality for species
* †Palaeopteridium
** †Palaeopteridium reussii
* †Palaeostachys
** †Palaeostachys andrewsii
* †Palaeostylus
* †Palaeozygopleura
** †Palaeozygopleura venusta
** †Palaeozygopleura welleri
** †Palaeozygopleura wortheni – type locality for species
* †Palaiotaptus – type locality for genus
** †Palaiotaptus mazonus – type locality for species
* †Palenarthrus – type locality for genus
** †Palenarthrus impressus – type locality for species
* †Paleospora
** †Paleospora fragila
* †Palmatopteris
* †Parachaetetes
* †Paraconularia
* †Paraisobuthus
** †Paraisobuthus virginiae – type locality for species
* †Parajuresania
** †Parajuresania nebrascensis
* †Parallelodon
** †Parallelodon obsoletus
** †Parallelodon sangamonensis
* †Parallelora
** †Parallelora nupera
* †Paralogopsis – type locality for genus
** †Paralogopsis longipes – type locality for species
* †Paramphicrinus – type locality for genus
** †Paramphicrinus oklahomaensis – type locality for species
* †Parapaolia
** †Parapaolia superba – type locality for species
* †Paraparchites
** †Paraparchites carbonaria
** †Paraparchites nicklesi
* †Paraphorhynchus
** †Paraphorhynchus striatocostatum
* †Paratarbus – type locality for genus
** †Paratarbus carbonarius – type locality for species
* †Pareinoblatta
** †Pareinoblatta sellardsi – type locality for species
* †Paromylacris
** †Paromylacris ampla – type locality for species
** †Paromylacris rotunda – type locality for species
* †Parulocrinus
** †Parulocrinus pontiacensis – type locality for species
* †Patellilabia
** †Patellilabia chesterensis
* †Paucicrura
* †Paucijaculum – type locality for genus
** †Paucijaculum samamithion – type locality for species
* †Paupospira
** †Paupospira thebesensis – type locality for species
* Fossils of the Late Devonian-Permian fern-like fronds Pecopteris †Pecopteris
** †Pecopteris plumosa
** †Pecopteris serrulata
** †Pecopteris vestita
* †Pendulostachys – type locality for genus
** †Pendulostachys cingulariformis – type locality for species
* †Pentaramicrinus
** †Pentaramicrinus bimagnaramus
* †Pentremites
** †Pentremites clavatus
** †Pentremites godoni
** †Pentremites obesus
** †Pentremites okawensis
** †Pentremites pyriformis
** †Pentremites springeri
** †Pentremites tulipaformis
* †Pentremoblastus
* †Pericalyphe – type locality for genus
** †Pericalyphe longa – type locality for species
* Fossil of the Silurian-Carboniferous crinoid ("sea lily") Periechocrinus †Periechocrinus
** †Periechocrinus chicagoensis
** †Periechocrinus infelix
** †Periechocrinus marcouanus
** †Periechocrinus necis
** †Periechocrinus urniformis
* †Pernopecten
** †Pernopecten attenuatus – tentative report
** †Pernopecten ohioensis
* †Perotriletes
** †Perotriletes parvigracilus
* †Petrochus
** †Petrochus conica
** †Petrochus mellaria – or unidentified comparable form
* Fossil of the Late Ordovician-Late Devonian trilobite Phacops †Phacops
** †Phacops norwoodensis
* †Phanerotrema
* †Pharkidonotus
** †Pharkidonotus harrodi – type locality for species
** †Pharkidonotus percarinatus
* †Phascolophyllaphycus
** †Phascolophyllaphycus lohrensis
* †Phestia
** †Phestia bellistriatus
* Life restoration of the Carboniferous-Permian amphibian Phlegethontia. †Phlegethontia
** †Phlegethontia longissima – type locality for species
* †Phlyctiscapha
* †Phragmoceras
* †Phragmolites
** †Phragmolites multinotatus – type locality for species
* †Phyloblatta
** †Phyloblatta diversipennis – type locality for species
** †Phyloblatta hilliana – type locality for species
* †Phymatopleura
* †Pilosisporites
** †Pilosisporites williamsii
* †Pisocrinus
* †Pityosporites
* †Planisporites
** †Planisporites granifer
* †Platyceras
** †Platyceras lineata
** †Platyceras subrotundum
* †Platycrinus
* †Platylichas
* †Platymylacris
** †Platymylacris paucinervis – type locality for species
* Life restoration of the Carboniferous-Permian bony fish Platysomus †Platysomus
** †Platysomus circularis
* †Platystrophia
** †Platystrophia biforata
* †Platyzona
* †Plectatrypa
* †Pleophrynus – type locality for genus
** †Pleophrynus ensifer – type locality for species
* †Pleurojulus
** †Pleurojulus biornatus – or unidentified comparable form
* †Plicochonetes
** †Plicochonetes glenparkensis – tentative report
* †Plummericrinus
** †Plummericrinus erectus
* †Pohlispongia – type locality for genus
** †Pohlispongia monosphaera – type locality for species
* †Pojetaconcha
** †Pojetaconcha limatula
* †Poliochera – type locality for genus
** †Poliochera gibbsi – type locality for species
** †Poliochera glabra – type locality for species
** †Poliochera punctulata – type locality for species
* †Polusocrinus
** †Polusocrinus avanti
* †Polyernus – type locality for genus
** †Polyernus complanatus – type locality for species
* †Polyetes – type locality for genus
** †Polyetes furcifer – type locality for species
* †Polygonocrinus
** †Polygonocrinus spiniferus – type locality for species
* Life restoration of the Carboniferous Chimaera relative Polysentor †Polysentor – type locality for genus
** †Polysentor gorbairdi – type locality for species
* †Porcellia
** †Porcellia chesterensis
* †Poteriocrinus – tentative report
* †Potonieisporites
** †Potonieisporites elegans
* †Priapulites – type locality for genus
** †Priapulites konecniorum – type locality for species
* †Probletocrinus – type locality for genus
** †Probletocrinus curtus – type locality for species
* †Prochoroptera – type locality for genus
** †Prochoroptera calopteryx – type locality for species
* †Procoronaspora
** †Procoronaspora dumosa
* †Prodentalium
* †Productella
** †Productella subalata
* Restoration of the Silurian trilobite Proetus †Proetus
** †Proetus canalis
** †Proetus determinatus
** †Proetus handwerki
* †Progenentomum – type locality for genus
** †Progenentomum carbonis – type locality for species
* †Promexyele
** †Promexyele peyeri
* †Promylacris
** †Promylacris ovalis – type locality for species
* †Promytilus – tentative report
** †Promytilus annosus
* †Protatrypa
* †Protoblattoidea – report made of unidentified related form or using admittedly obsolete nomenclature
** †Protoblattoidea minor
** †Protoblattoidea sellardsi
* †Protodictyon – type locality for genus
** †Protodictyon pulchripenne – type locality for species
* †Protoleptostrophia
* †Protomegastrophia
* Life restoration of the Carboniferous insects Protophasma and Titanophasma †Protophasma
** †Protophasma galtieri – type locality for species
* †Protopilio
** †Protopilio depressus – type locality for species
* †Protoscolex
** †Protoscolex ruedemanni
* †Protosolpuga – type locality for genus
** †Protosolpuga carbonaria – type locality for species
* †Pseudaviculopecten
** †Pseudaviculopecten princeps
* †Pseudoatrypa
** †Pseudoatrypa devoniana
* †Pseudogerarus – type locality for genus
** †Pseudogerarus scudderi – type locality for species
* †Pseudomonotis
** †Pseudomonotis equistriata
* Fossilized skeleton of the Carboniferous snake-like amphibian Pseudophlegethontia †Pseudophlegethontia – type locality for genus
** †Pseudophlegethontia turnbullorum – type locality for species
* †Pseudorthoceras
** †Pseudorthoceras knoxense
* †Pseudosphonophyton
** †Pseudosphonophyton höegii – type locality for species
* †Pseudozygopleura
** †Pseudozygopleura yandellana – or unidentified comparable form
* †Pterinea
** †Pterinea thebesensis
* †Pterochiton
** †Pterochiton carbonarius – type locality for species
* †Pteronites
* †Pterotheca
** †Pterotheca triangularis – type locality for species
* †Pterotocrinus
** †Pterotocrinus abruptus
** †Pterotocrinus armatus
** †Pterotocrinus capitalis
** †Pterotocrinus coronarius
** †Pterotocrinus lingulaformis
** †Pterotocrinus rugosus
* †Ptychocarpus
* †Pulchratia – tentative report
** †Pulchratia symmetrica
* †Punctatisporites
** †Punctatisporites aerarius
** †Punctatisporites curviradiatus
** †Punctatisporites decorus
** †Punctatisporites edgarensis
** †Punctatisporites flavus
** †Punctatisporites glaber
** †Punctatisporites gracilirugosus – or unidentified comparable form
** †Punctatisporites irrasus
** †Punctatisporites kankakeensis
** †Punctatisporites minutus
** †Punctatisporites nahannensis
** †Punctatisporites obesus
** †Punctatisporites obliquus
** †Punctatisporites orbicularis
** †Punctatisporites pseudolevatus – or unidentified comparable form
** †Punctatisporites vermiculatus
* †Punctatosporites
** †Punctatosporites minutus
* †Punctospirifer
** †Punctospirifer kentuckensis
** †Punctospirifer transversus
* †Pustulatisporites
** †Pustulatisporites crenatus
* †Pustulatisporties
** †Pustulatisporties crenatus
* †Pycnosaccus
* †Pyrgocystis

## 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
* †Quadrochonetes
** †Quadrochonetes geronticus
* †Quasillinites
** †Quasillinites diversiformis

## 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
* †Radiizonates
** †Radiizonates striatus
* †Rafinesquina
** †Rafinesquina mesicosta
* †Raistrickia
** †Raistrickia abdita
** †Raistrickia aculeata
** †Raistrickia aculeolata
** †Raistrickia breveminens
** †Raistrickia brevemines
** †Raistrickia carbondalensis
** †Raistrickia crinita
** †Raistrickia crocea
** †Raistrickia dispar
** †Raistrickia fibrata – or unidentified comparable form
** †Raistrickia grovensis
** †Raistrickia irregularis
** †Raistrickia lacerata
** †Raistrickia lowellensis
** †Raistrickia pilosa
** †Raistrickia pontiacensis
** †Raistrickia prisca
** †Raistrickia solaria
** †Raistrickia subcrinita
** †Raistrickia superba
* †Rasstriga – type locality for genus
** †Rasstriga americana – type locality for species
* †Redstockia
* †Reinschospora
** †Reinschospora magnifica
** †Reinschospora triangularis
* †Remopleurides
** †Remopleurides missouriensis
* †Renaultia
* †Renisporites
** †Renisporites confossus
* †Resserella
* †Reticulariiina
** †Reticulariiina spinosa
* †Reticulariina
** †Reticulariina spinosa
* †Reticulatia
** †Reticulatia huecoensis
* †Reticulatisporites
** †Reticulatisporites lacunosus
** †Reticulatisporites muricatus
** †Reticulatisporites polygonalis
** †Reticulatisporites reticulatus
** †Reticulatisporites splendens
* †Reticulograptus
** †Reticulograptus polymorphus
* †Retispira
** †Retispira monronensis – type locality for species
** †Retispira nodocostata – type locality for species
** †Retispira ornatus – type locality for species
* †Rhabdoxylon
** †Rhabdoxylon americanum – type locality for species
* †Rhineoderma
** †Rhineoderma piasaensis – type locality for species
* †Rhipidium
* †Rhipidomella
** †Rhipidomella carbonaria
** †Rhipidomella rockportensis
* †Rhodea
** †Rhodea trichomanoides – or unidentified comparable form
* †Rhodeopteridium
** †Rhodeopteridium phillipsii – type locality for species
* †Rhombopora
* †Rhynchogonium
** †Rhynchogonium fayettevillense
* Fossilized shell of the Silurian-Eocene articulate brachiopod Rhynchonella †Rhynchonella
* †Rhynchopora
** †Rhynchopora hamburgensis
** †Rhynchopora prisca
** †Rhynchopora pustulosa
* †Rhynchotreta
* †Rugosochonetes
** †Rugosochonetes gregarius – or unidentified comparable form
** †Rugosochonetes pikensis
* †Ruthiphiala
** †Ruthiphiala sublaevis

## 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
* †Saccoglossus
** †Saccoglossus testa – type locality for species
* †Saetograptus
** †Saetograptus colonus
* †Sagenodus
** †Sagenodus cristatus – type locality for species
* †Sagittoceras
** †Sagittoceras hathawayanum – type locality for species
* †Salterospira
** †Salterospira chesterensis
** †Salterospira okawensis
* †Salvadorea
** †Salvadorea randi
* †Samaropsis
* †Savagella
** †Savagella illinoisensis
** †Savagella lindahli
* †Savitrisporites
** †Savitrisporites asperatus
** †Savitrisporites majus
** †Savitrisporites nux
* †Scepasma – type locality for genus
** †Scepasma gigas – type locality for species
* †Sceptropora
** †Sceptropora facula
* †Schizodus
* †Schizophoria
** †Schizophoria hortonensis
** †Schizophoria iowensis
* †Schizotreta
** †Schizotreta tenuilamellata
* †Schondorfia – type locality for genus
** †Schondorfia fungosa – type locality for species
* †Schopfites
** †Schopfites carbondalensis
** †Schopfites colchesterensis
** †Schopfites dimorphus
* †Schuchertella
** †Schuchertella hardinensis
** †Schuchertella louisianaensis
** †Schuchertella propinqua
* †Schuchertiella – type locality for genus
** †Schuchertiella gracilis – type locality for species
* †Schulzospora
** †Schulzospora rara
* †Sciadiocrinus
** †Sciadiocrinus tegillum – type locality for species
* †Scolecopteris – tentative report
* †Sedenticellula
** †Sedenticellula hamburgensis
* †Selenella
** †Selenella pediculus
* †Semiproductus
* †Senftenbergia
* †Sentosia
** †Sentosia ignota – tentative report
* †Septameroceras
* †Serpulopsis
* †Serpulospira
** †Serpulospira diversiformis
* †Shansiella
** †Shansiella broadheadi – tentative report
* †Shumardella
** †Shumardella fracta
* †Sievertsia
* Fossilized stump of the Carboniferous-Permian club moss relative Sigillaria †Sigillaria
** †Sigillaria mamillaris – or unidentified comparable form
** †Sigillaria rugosa
* †Sigillariostrobus
* †Silphion – type locality for genus
** †Silphion latipenne – type locality for species
* †Similihariotta – type locality for genus
** †Similihariotta dabasinskasi – type locality for species
* † Simplicius
** †Simplicius simplex – type locality for species
* †Sinuspores
** †Sinuspores sinuatus
* †Siphonocrinus
** †Siphonocrinus nobilis
* †Skenidioides
* Modern specimen of the marine bivalve Solemya Solemya
** †Solemya trapezoides
* †Soleniscus
** †Soleniscus primogenius
* †Solenochilus
** †Solenochilus shumwayense – type locality for species
* †Sorellophrynus – type locality for genus
** †Sorellophrynus carbonarius – type locality for species
* †Spackmanites
** †Spackmanites facierugosus – or unidentified comparable form
** †Spackmanites habibii
* †Sphaerexochus
** †Sphaerexochus roemingeri
** †Sphaerexochus romingeri
* †Sphaerocoryphe
** †Sphaerocoryphe arachniformis
* Fossilized leaves and branches of the Devonian-Triassic horsetail relative Sphenophyllum †Sphenophyllum
** †Sphenophyllum cuneifolium
** †Sphenophyllum emarginatum
** †Sphenophyllum longifolium – or unidentified comparable form
* †Sphenopteris
** †Sphenopteris distans
** †Sphenopteris preslesensis
* †Sphenosphaera
** †Sphenosphaera consimilis – type locality for species
* †Spilaptera
** †Spilaptera americana – type locality for species
* †Spilomastax – type locality for genus
** †Spilomastax oligoneurus – type locality for species
* †Spinatrypa
** †Spinatrypa bellula
** †Spinatrypa occidentalis
* †Spinosporites
** †Spinosporites exiguus
* †Spinyplatyceras
** †Spinyplatyceras fornicatum
* †Spondylerpeton – type locality for genus
** †Spondylerpeton spinatum – type locality for species
* †Srokalarva – type locality for genus
** Srokalarva berthei part and counterpart †Srokalarva berthei – type locality for species
* †Staurocephalus
** †Staurocephalus obsoleta
* †Stearoceras
** †Stearoceras involutum – type locality for species
* †Stegerhynchus
** †Stegerhynchus antiqua
** †Stegerhynchus concinna
* †Stegocoelia
** †Stegocoelia okawensis
* †Stellarocrinus
** †Stellarocrinus bilineatus – type locality for species
** †Stellarocrinus virgilensis – or unidentified comparable form
* †Stellatheca
** †Stellatheca latiloba
** †Stellatheca ornata
* †Stenopareia
* †Stenopecrinus
** †Stenopecrinus planus – or unidentified comparable form
* †Stenoscisma
** †Stenoscisma explanatum
* †Stephanopsis – type locality for genus
** †Stephanopsis mirandus – type locality for species
* †Stephanozyga
* Life restorations of a male (foreground) and female (background) of the Late Devonian-Carboniferous Chimaera relative Stethacanthus †Stethacanthus
** †Stethacanthus altonensis
* †Stictopora
* †Stigmaria
** †Stigmaria ficoides
** †Stigmaria stellata
** †Stigmaria wedingtonensis
* †Straparollus
** †Straparollus subquadratus
* †Streblochondria
* †Striispirifer
* †Strobeus
** †Strobeus brevis
** †Strobeus paludinaeformis
* †Strophomena
* †Strophostylus
** †Strophostylus wortheni – type locality for species
* †Styptobasis
** †Styptobasis aculeata – type locality for species
* †Subglobosochonetes
** †Subglobosochonetes jerseyensis
* Fossil of the Carboniferous Chimaera relative Symmorium †Symmorium – type locality for genus
** †Symmorium reniforme – type locality for species
* †Syntonoptera – type locality for genus
** †Syntonoptera schucherti – type locality for species
* †Sypharoptera – type locality for genus
** †Sypharoptera pneuma – type locality for species
* †Syringopora
* †Syringothyris
** †Syringothyris extenuata
** †Syringothyris hannibalensis

## 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
* †Tainoceras
** †Tainoceras monilifer
** †Tainoceras sexlineatum – type locality for species
* †Telangiopsis
* †Telangium
* †Telmatoscorpio – type locality for genus
** †Telmatoscorpio brevipectus – type locality for species
* Fossilized shell of the Early Ordovician-Late Devonian probable mollusc Tentaculites †Tentaculites
** †Tentaculites bellulus
* †Terpnocrinus – type locality for genus
** †Terpnocrinus ocoyaensis – type locality for species
* †Testajapyx – type locality for genus
** †Testajapyx thomasi – type locality for species
* †Thalamocrinus
* †Thaleops
** †Thaleops depressicapitata
* †Thallites
** †Thallites dichopleurus
* †Thebanaspis
** †Thebanaspis channahonensis
* †Thebesia
** †Thebesia thebesensis
* †Thelyphrynus – type locality for genus
** †Thelyphrynus elongatus – type locality for species
* †Thesoneura – type locality for genus
** †Thesoneura americana – type locality for species
* †Thigriffides
** †Thigriffides roundyi
* †Tholocrinus
** †Tholocrinus discus – type locality for species
** †Tholocrinus unionensis – type locality for species
* †Thuroholia
** †Thuroholia cribriformis – type locality for species
** †Thuroholia croneisi – type locality for species
* †Thyloblatta
* †Thymospora
** †Thymospora pseudothiessenii
* †Titanoscorpio – type locality for genus
** †Titanoscorpio douglassi – type locality for species
* †Torispora
** †Torispora securis
* †Torynifer
** †Torynifer setiger
* †Tranodis
** †Tranodis castrensis
* †Tremanotus
* †Trepospira
** †Trepospira depressa
* †Triamara
** †Triamara tumida
** †Triamara ventricosa
* †Trigera – tentative report
* †Trigonocarpus
* †Trigonoglossa – tentative report
** †Trigonoglossa nebrascensis
* †Trigonotarbus
** †Trigonotarbus carbonarius – type locality for species
* †Trihyphaecites
** †Trihyphaecites triangulatus
* †Triquitrites
** †Triquitrites additus
** †Triquitrites arculatus – or unidentified comparable form
** †Triquitrites bransonii
** †Triquitrites crassus
** †Triquitrites desperatus
** †Triquitrites dividuus
** †Triquitrites exiguus
** †Triquitrites minutus
** †Triquitrites protensus
** †Triquitrites pulvinatus
** †Triquitrites sculptilis
** †Triquitrites spinosus
** †Triquitrites subspinosus
** †Triquitrites trigonappendix
** †Triquitrites truncatus
* †Triticites
** †Triticites pauper
** †Triticites turgidus
* †Trochonema
** †Trochonema umbilicata – or unidentified comparable form
* †Trochurus
** †Trochurus welleri
* †Tropidodiscus
** †Tropidodiscus compticarinatus
* †Tuberculatosporites
** †Tuberculatosporites robustus
* Restoration of the mysterious Carboniferous life-form Tullimonstrum, or the Tully monster †Tullimonstrum – type locality for genus
** †Tullimonstrum gregarius – type locality for species
* †Turnbullia – type locality for genus
** †Turnbullia priscillae – type locality for species
* †Tylothyris
** †Tylothyris missouriensis

## U

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
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* L
* M
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* P
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* †Ulocrinus
** †Ulocrinus convexus
** †Ulocrinus sangamonensis
* †Undulabucania
** †Undulabucania punctifrons
* †Unispirifer
** †Unispirifer senex

## V

* A
* B
* C
* D
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* F
* G
* H
* I
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* L
* M
* N
* O
* P
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* X
* Y
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* †Vallatisporites
* †Valmeyeraphycus
** †Valmeyeraphycus jerseyensis
* †Valmeyerodendron
** †Valmeyerodendron triangularifolium
* †Verrucosisporites
** †Verrucosisporites compactus
** †Verrucosisporites donarii
** †Verrucosisporites firmus
** †Verrucosisporites microtuberosus
** †Verrucosisporites papulosus
** †Verrucosisporites sifati
** †Verrucosisporites verrucosus
** †Verrucosisporites verus – or unidentified comparable form
* †Vesicaspora
** †Vesicaspora wilsonii
* †Vestispora
** †Vestispora colchesterensis
** †Vestispora costata
** †Vestispora fenestrata
** †Vestispora foveata
** †Vestispora irregularis
** †Vestispora laevigata
** †Vestispora profunda
** †Vestispora pseudoreticulata
** †Vestispora wanlessii
* †Volsellina
** †Volsellina subelliptica

## W

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
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* L
* M
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* P
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* Y
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* †Waeringoscorpio – type locality for genus
** †Waeringoscorpio alliedensis – type locality for species
* †Wellerella
** †Wellerella osagensis
** †Wellerella tetrahedra
* †Welleriella – tentative report
* †Whidbornella
** †Whidbornella curtirostris
* †Whitella
** †Whitella sterlingensis
* †Whitfieldella
** †Whitfieldella billingsana
* †Whittleseya
* †Wilkingia
** †Wilkingia costatum
* †Wilsonites
** †Wilsonites circularis
** †Wilsonites delicatus
** †Wilsonites vesicatus
* †Worthenia
** †Worthenia tabulata

## X

* A
* B
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* D
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* G
* H
* I
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* M
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* P
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* X
* Y
* Z
* Illustration of a fossil of the Carboniferous millipede Xyloiulus †Xyloiulus
** †Xyloiulus frustulentus – type locality for species
** †Xyloiulus mazonus – type locality for species

## Y

* A
* B
* C
* D
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* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
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* T
* U
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* X
* Y
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* †Yochelsonospira – type locality for genus
** †Yochelsonospira tenuilineata – type locality for species
* Yoldia

## Z

* A
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* H
* I
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* M
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* X
* Y
* Z
* †Zangerlispongia – type locality for genus
** †Zangerlispongia richardsoni – type locality for species
* †Zaphrenthis
** †Zaphrenthis stokesi
* †Zeilleria
* †Zeugopleura
** †Zeugopleura jeffersonensis
* †Zophocrinus – tentative report
* †Zosterogrammus – type locality for genus
** †Zosterogrammus stichostethus – type locality for species