# List of the Paleozoic life of Alaska

This list of the Paleozoic life of Alaska contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Alaska 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
* †Abadehella
* †Acanthocladia
* †Acanthopecten
** †Acanthopecten carbonifer – or unidentified related form
** †Acanthopecten delawarensis – or unidentified related form
* †Acanthophyllum
* Fossil of the Silurian-Middle Devonian trilobite Acanthopyge †Acanthopyge
* †Acervularia
* †Aclisina – tentative report
* †Acmarhachis
** †Acmarhachis acutus
* †Acrosaccus
** †Acrosaccus shuleri – or unidentified comparable form
* †Acrothele
* †Actinocystis – tentative report
** †Actinocystis perfecta – or unidentified comparable form
* †Actinostroma
* †Adolfispirifer
** †Adolfispirifer sanjuanensis
* †Afilasma
* †Agathammina
* †Agetolites
* †Aglaoglypta
* Fossilized shell of the Middle Devonian ammonoid cephalopod, Agoniatites †Agoniatites – tentative report
* †Akidograptus
** †Akidograptus acuminatus
* †Alaskacirrus – type locality for genus
** †Alaskacirrus bandeli – type locality for species
* †Alaskaspongia
** †Alaskaspongia nana
* †Alaskaspongiella – type locality for genus
** †Alaskaspongiella laminosa – type locality for species
* †Alaskiella – type locality for genus
** †Alaskiella medfraensis – type locality for species
* †Alaskodiscus
** †Alaskodiscus donensis
* †Alaskospira
** †Alaskospira dunbari
* †Alaskozygopleura
** †Alaskozygopleura crassicostata
* †Albaillella
** †Albaillella cartalla – or unidentified related form
* †Aldanispirifer
* †Allonema
** †Allonema silurica
* †Allorhynchoides – type locality for genus
** †Allorhynchoides kirki – type locality for species
* †Alokistocare – or unidentified comparable form
** †Alokistocare lobatum
* †Alveolitella
* †Alveolites
* †Amblysiphonella
* †Ambocoelia
** †Ambocoelia planiconvexa – or unidentified related form
** †Ambocoelia umbonata
* †Amoenospirifer
** †Amoenospirifer angustiplicata
** †Amoenospirifer sulcalplicata
* †Amphipora
* †Amplexograptus
** †Amplexograptus confertus – or unidentified comparable form
** †Amplexograptus perexcavatus – or unidentified comparable form
* †Amplexoides
* †Amplexus
* †Anatrypa
** †Anatrypa alinensis – or unidentified related form
** †Anatrypa khavae – or unidentified comparable form
* †Ancillotoechia
** †Ancillotoechia antiquaria
* †Ancyrognathus
** †Ancyrognathus amana – or unidentified comparable form
* †Anematina
** †Anematina rockymontanum
* †Anemonaria
** †Anemonaria pseudohorrida
* †Angullongia
** †Angullongia minuta
* †Anidanthus
* †Anisopleurella
** †Anisopleurella tricostata – type locality for species
* †Anisotrypa – tentative report
* †Anomalograptus
* †Anomphalus – tentative report
* †Anopolenus
** †Anopolenus henrici
* †Anoptambonites
** †Anoptambonites grayae
** †Anoptambonites pulchra
* †Antherosalpinx
* †Anthraconeilo – tentative report
* †Aparchitella – tentative report
* †Aphelognathus
** †Aphelognathus divergens – or unidentified related form
* †Apheoorthis
* †Aphrosalpinx
** †Aphrosalpinx nana – type locality for species
** †Aphrosalpinx textilis
* †Aphyllum
* †Archaediscus
* †Archeocidaris – tentative report
* †Arctitreta
** †Arctitreta kempei – or unidentified comparable form
* †Arctozone – type locality for genus
** †Arctozone cooki – type locality for species
* †Arjamannia
** †Arjamannia thraivensis – or unidentified related form
* †Aseptirhynchia
** †Aseptirhynchia glabrata
* †Asgardaspira
** †Asgardaspira gerulus – type locality for species
* †Astralites
** †Astralites gamblei – type locality for species
* †Athabaskiella
** †Athabaskiella ardis – type locality for species
* †Athyris
** †Athyris lamellosa – or unidentified related form
* †Atomodesma – tentative report
* Fossilized shell of the Late Ordovician-Carboniferous brachiopod Atrypa †Atrypa
** †Atrypa hystrix
** †Atrypa reticularis
* †Atrypella
** †Atrypella borealis
** †Atrypella scheii
** †Atrypella tenuis
* †Atrypoidea
** †Atrypoidea scheii
* †Attenuatella
* †Aulocystis
* †Aulopora
* †Australonema
* †Australophyllum
* Mold fossil of a shell of the Early Devonian-Late Triassic bivalve Aviculopecten †Aviculopecten
** †Aviculopecten chesterensis – tentative report
** †Aviculopecten delawarensis – or unidentified related form
** †Aviculopecten edwardsi – or unidentified related form
** †Aviculopecten fasciculatus – or unidentified related form
** †Aviculopecten hardinensis – or unidentified related form
** †Aviculopecten mccoyi – or unidentified related form
** †Aviculopecten montpelierensis – or unidentified related form
** †Aviculopecten occidentalis – or unidentified related form
** †Aviculopecten similis – or unidentified related form
* † Avonia – tentative report

## 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
* †Bailiaspis
** †Bailiaspis picta
* Bairdia
* †Balbinipleura
** †Balbinipleura krawczynskii – type locality for species
* †Barocospira
** †Barocospira cindiprellerae – type locality for species
* †Bathyuriscidella
** †Bathyuriscidella socialis
* †Bathyuriscus
** †Bathyuriscus punctatus – type locality for species
* †Batostomella
* †Belemnites – tentative report
* Fossilized shell of the Silurian-Early Triassic mollusc Bellerophon †Bellerophon
** †Bellerophon chapmani
** †Bellerophon livengoodensis
** †Bellerophon spergensis – or unidentified related form
* †Belodina
* †Belowea
** †Belowea variabilis
* †Bembexia – tentative report
** †Bembexia inumbilicata – type locality for species
* †Bensbergia
** †Bensbergia subcostata – or unidentified related form
* †Beraunia
** †Beraunia bifrons
** †Beraunia bohemica
* †Betaneospirifer
** †Betaneospirifer marcoui – or unidentified related form
* †Beyrichia
** †Beyrichia churkini
* †Bicarinatina
** †Bicarinatina kongakutensis – type locality for species
* †Bighornia
* †Bimuria
** †Bimuria gilbertella
* †Blasispirifer
** †Blasispirifer blasii – or unidentified related form
* †Bohemicardia
** †Bohemicardia bohemica – or unidentified comparable form
* †Bolaspidella
** †Bolaspidella wellsvillensis
* †Bothrodendron
** †Bothrodendron kiltorkense
* †Boucotspira
** †Boucotspira carinifer
* †Brachylasma – tentative report
* †Brachymetopus
** †Brachymetopus pseudometopina
* †Brachyprion
* †Brachythyrina
** †Brachythyrina rectangula – or unidentified related form
* †Brachythyris
** †Brachythyris subcardiformis – or unidentified related form
** †Brachythyris subcardiiformis – or unidentified related form
** †Brachythyris suborbicularis – or unidentified related form
** †Brachythyris ufensis – or unidentified related form
* †Breviphyllum
** †Breviphyllum lindstromi – or unidentified comparable form
* †Briscoia – tentative report
* †Bronteus
* †Brooksina
** †Brooksina alaskensis
* †Bruntonia
** †Bruntonia granulifera
* †Bucanopsis
** †Bucanopsis volgulica – or unidentified related form
* †Buechelia
** †Buechelia nodosa
* †Bulimorpha
* †Bulimorphia
** †Bulimorphia peracuta – or unidentified related form
* †Buthrotrephis – tentative report

## C

* 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
* †Calapoecia
* †Calceola
** †Calceola sandalina – or unidentified comparable form
* †Callaiapsida
** †Callaiapsida arctica
** †Callaiapsida kekuensis – type locality for species
** †Callaiapsida pentameroides – or unidentified related form
* †Calliprotonia – tentative report
* †Callistadia
* †Callograptus
* †Callositella – type locality for genus
** †Callositella cheeneetnukensis – type locality for species
* †Callospiriferina
** †Callospiriferina pinguis
* †Calymene
** Fossil of the Silurian trilobite Calymene blumenbachii †Calymene blumenbachii
** †Calymene iladon
* †Camarotoechia
** †Camarotoechia billingsi – or unidentified comparable form
** †Camarotoechia duplicata – tentative report
** †Camarotoechia winiskensis – or unidentified comparable form
* †Campophyllum – tentative report
* †Cancrinella
** †Cancrinella cancrini – or unidentified related form
** †Cancrinella cancriniformis – or unidentified related form
** †Cancrinella koninckiana – or unidentified related form
** †Cancrinella tenuissima
* †Caneyella – tentative report
* †Capellinia
* Capulus
* †Cardiomorpha – tentative report
* †Carinatina
* †Caruthia – type locality for genus
** †Caruthia borealis – type locality for species
* †Caryocaris
* †Catazyga
* Fossil of the Ordovician-Silurian tabulate coral Catenipora †Catenipora
** †Catenipora jacovikii – or unidentified comparable form
** †Catenipora robustus – or unidentified comparable form
** †Catenipora rubra – or unidentified comparable form
* †Cedaria
* †Centronella
** †Centronella navicella – or unidentified comparable form
* †Ceratiacaris
* †Ceratopea
** †Ceratopea medfraensis – type locality for species
* †Cernuolimbus
** †Cernuolimbus longifrons
* †Chaetetes
** †Chaetetes milleporaceous
* †Chaetetipora
** †Chaetetipora ellesmerensis – or unidentified comparable form
* †Chaoiella
** †Chaoiella gruenewaldti – or unidentified related form
* †Chapinella – type locality for genus
** †Chapinella bucareliensis – type locality for species
* †Charactophyllum
* †Cheeneetnukia – type locality for genus
** †Cheeneetnukia frydai – type locality for species
* †Cheilocephalus
** †Cheilocephalus expansus – type locality for species
* †Cheiropyge
** †Cheiropyge himalayensis
* Fossil of the Cambrian-Middle Devonian trilobite Cheirurus †Cheirurus
* †Chirognathus – tentative report
* †Chlupacispira – type locality for genus
** †Chlupacispira spinosa – type locality for species
* †Chonetes
** †Chonetes capax – or unidentified related form
** †Chonetes illinoisensis – or unidentified related form
** †Chonetes manitobensis – or unidentified comparable form
** †Chonetes timanicus – or unidentified related form
** †Chonetes verneuile – or unidentified comparable form
** †Chonetes verneuilianus – or unidentified related form
* †Chonetina – report made of unidentified related form or using admittedly obsolete nomenclature
* †Chonetinella
* †Chonetipustula
** †Chonetipustula concentrica
* †Chonetoidea – or unidentified related form
* †Chonophyllum
* †Choristites
* †Christiania
** †Christiania aseptata – type locality for species
* †Chusenella
** †Chusenella atlinensis – or unidentified loosely related form
* Fossil of the Carboniferous tabulate coral Cladochonus †Cladochonus
* †Cladopora
* †Cladospongia – type locality for genus
** †Cladospongia alaskensis – type locality for species
* †Clathronema
** †Clathronema cingulata
** †Clathronema cloughi
* †Cleiothyridina
** †Cleiothyridina milleri – type locality for species
** †Cleiothyridina sublamellosa – or unidentified related form
* †Cleiothyris
** †Cleiothyris suborbiculoides – or unidentified related form
* †Cliefdenella
** †Cliefdenella alaskaensis
* Assemblage of fossils of the Cambrian graptolite Climacograptus †Climacograptus
** †Climacograptus antiquus – or unidentified related form
** †Climacograptus bicornis
** †Climacograptus eximius – or unidentified comparable form
** †Climacograptus hughesi – or unidentified comparable form
** †Climacograptus indivisus
** †Climacograptus innotatus
** †Climacograptus medius
** †Climacograptus minutus – tentative report
** †Climacograptus phyllophorus – or unidentified comparable form
** †Climacograptus pungens
** †Climacograptus rectangularis
** †Climacograptus scalaris
** †Climacograptus stenotelus
** †Climacograptus trifilis
* †Cliothyridina
** †Cliothyridina incrassata – or unidentified related form
** †Cliothyridina orbicularis – or unidentified related form
** †Cliothyridina sublamellosa – or unidentified related form
* †Clisiophyllum
* †Clorinda
* †Codonofusiella
* †Coelocaulus
** †Coelocaulus karlae – type locality for species
* †Coeloconus
* †Coelospira
* †Coelotrochium
* †Coenites
* †Colpomya – tentative report
** †Colpomya audae – or unidentified related form
** †Colpomya hugini – or unidentified related form
* †Compacoleus
* Fossilized shell of the Late Devonian-Permian brachiopod Composita †Composita
** †Composita ambigua – or unidentified comparable form
** †Composita bellula – or unidentified related form
* †Comuquia
** †Comuquia curvirostris – or unidentified related form
* †Conchidium
** †Conchidium alaskense
** †Conchidium knighti
* †Condrathyris
** †Condrathyris perplexa
* †Conocardium
* †Contortophyllum
* †Cordylodus – tentative report
* †Corymbospongia
** †Corymbospongia adnata
** †Corymbospongia amplia – type locality for species
** †Corymbospongia betella
* †Corynexochus
** †Corynexochus perforatus
** †Corynexochus plumula
* †Corynoides
** †Corynoides tricornis
* †Cotalagnostus – or unidentified comparable form
** †Cotalagnostus lens
* †Cranaena
** †Cranaena romingeri – or unidentified comparable form
* Fossilized shell of the Late Cretaceous brachiopod Crania †Crania
* †Craspedalosia – tentative report
* †Craspedelia
** †Craspedelia potterella – type locality for species
* †Crassialveolites
* †Craterophyllum – or unidentified comparable form
* †Craticula – report made of unidentified related form or using admittedly obsolete nomenclature
** †Craticula gotlandica
* †Crurithyris
** †Crurithyris alaskensis – type locality for species
* †Cryptacanthia
** †Cryptacanthia compacta – or unidentified related form
* †Cryptograptus
** †Cryptograptus centrifugus – or unidentified comparable form
** †Cryptograptus schaferi
** †Cryptograptus tricornis
* †Cyathactis
* †Cyathaxonia
* †Cyathodictya
* †Cyathophylloides
* †Cyathophyllum
* †Cyclonema
** †Cyclonema servus
* Fossilized foliage from the Carboniferous seed fern Cyclopteris †Cyclopteris – tentative report
* †Cyclospira
** †Cyclospira elegantula
** †Cyclospira orbus
* †Cymbidium
** †Cymbidium acutum
** †Cymbidium retrorsum
* †Cymostrophia
** †Cymostrophia costatula – or unidentified comparable form
* †Cyphaspis
* †Cypricardella
* †Cypricardina
** †Cypricardina consimilis – or unidentified related form
* †Cypricardinia
** †Cypricardinia contexta
* †Cyrolexis
** †Cyrolexis superstes – or unidentified related form
* †Cyrtia
* †Cyrtina
** †Cyrtina billingsi – or unidentified comparable form
* †Cyrtinaella
** †Cyrtinaella undulata
* Restoration of the Cambrian-Middle Devonian nautiloid cephalopod Cyrtoceras †Cyrtoceras
* †Cyrtospira
* †Cyrtospirifer
** †Cyrtospirifer buddingtoni – type locality for species
** †Cyrtospirifer paridaensis
* †Cystihalysites
* †Cystiphylloides
* †Cystiphyllum
* †Cystodictya
** †Cystodictya lineata – or unidentified related form
** †Cystodictya pustulosa – or unidentified related form
* †Cystostroma
* †Cystothalamiella
** †Cystothalamiella alaskaensis
** †Cystothalamiella ducta
** †Cystothalamiella irregularis – type locality for species
** †Cystothalamiella polyducta
* Cytherella – tentative report
* †Cyztograptus

## 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
* †Daidia
** †Daidia cerithioides
** †Daidia sewardensis
* †Dalmanella
** †Dalmanella occlusa
* Fossil of the Late Ordovician-Middle Devonian trilobite Dalmanites †Dalmanites
* †Dasometopus
** †Dasometopus breviceps
* †Dechenella
* †Decorospira
** †Decorospira lepaini – type locality for species
** †Decorospira minutula – type locality for species
** †Decorospira tasselli
* †Deiracorallium
* †Delthyris
** †Delthyris sulcatus
* †Deltopecten
** †Deltopecten caneyanus – or unidentified related form
** †Deltopecten wyandotte – or unidentified related form
* †Dendrograptus
* †Dendrostella
** †Dendrostella rhenana – or unidentified comparable form
* Shell of a Dentalium tusk shell †Dentalium
** †Dentalium hecetaensis
* †Derbyia
** †Derbyia bennetti – or unidentified related form
** †Derbyia grandis – or unidentified comparable form
** †Derbyia robusta – or unidentified related form
* †Diambonia
** †Diambonia discuneata
* †Diaphragmus
* †Dicellograptus
** †Dicellograptus caduceus – or unidentified comparable form
** †Dicellograptus elegans – or unidentified comparable form
** †Dicellograptus gurleyi
** †Dicellograptus sextans
** †Dicellograptus smithi – or unidentified comparable form
* †Dicoelosia
** †Dicoelosia jonesridgensis
* †Dicranograptus
** †Dicranograptus contortus – tentative report
* †Dicricoconus
** †Dicricoconus dutroi
** †Dicricoconus mesodevonicus
** †Dicricoconus triannulatus
* †Dictyoclostus
** †Dictyoclostus gallatinensis – or unidentified related form
** †Dictyoclostus semireticulatus
** †Dictyoclostus tartaricus
* †Dictyonema
* Fossil of the Middle Ordovician graptolite Didymograptus †Didymograptus
** †Didymograptus extensus – or unidentified comparable form
** †Didymograptus nitidus – or unidentified comparable form
** †Didymograptus sagitticaulis
** †Didymograptus serratulus
* †Dielasma
** †Dielasma arkansanum – or unidentified related form
** †Dielasma bovidens – or unidentified related form
** †Dielasma formosum – or unidentified related form
** †Dielasma supracarbonicum – or unidentified related form
* †Digonophyllum
* †Dimorphograptus
** †Dimorphograptus confertus
** †Dimorphograptus physophora
* †Diorthelasma
** †Diorthelasma parvum
* †Diparelasma
* †Diphyphyllum
* †Diplochone
* Cambrian graptolite Diplograptus †Diplograptus
** †Diplograptus cyperoides – or unidentified comparable form
** †Diplograptus elongatus
** †Diplograptus euglyptus
** †Diplograptus hughesi
** †Diplograptus inutilis
** †Diplograptus modestus
** †Diplograptus mucroterminatus
** †Diplograptus multidens – or unidentified related form
** †Diplograptus nicolsoni – or unidentified comparable form
* †Diplopora – tentative report
* †Disphyllum
** †Disphyllum catenatum – or unidentified comparable form
** †Disphyllum goldfussi – or unidentified comparable form
* †Disphyllym – tentative report
* †Diversograptus
* †Doleroides
** †Doleroides panna – or unidentified related form
* †Donaldiella
* †Donaldospira
** †Donaldospira pertusa
* †Dorypyge
** †Dorypyge olenekensis – or unidentified comparable form
* †Drepanodus
* †Drepanoistodus
** †Drepanoistodus suberectus
* Fossilized foliage from the Early-Late Devonian club moss relative Drepanophycus †Drepanophycus
* †Droharhynchia
** †Droharhynchia rzhonsnitskayae – type locality for species
* †Dubovikovia
** †Dubovikovia kuzmini – or unidentified comparable form
* †Dunbarula
* †Dunderbergia
** †Dunderbergia seducta – type locality for species
* †Duolobella – type locality for genus
** †Duolobella sandiae – type locality for species
* †Dutrochus – type locality for genus
** †Dutrochus alaskensis – type locality for species
* †Dyoros
** †Dyoros spitzbergianus – or unidentified comparable form
* †Dytremacephalus – tentative report

## 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
* †Echinoconchus
** †Echinoconchus punctatus
* †Echyropora – tentative report
* †Ectomaria
** †Ectomaria orientalis
** †Ectomaria pagoda – or unidentified comparable form
** †Ectomaria prisca – or unidentified comparable form
* †Edmondia
* †Ekvasophyllum
* †Elburgia
** †Elburgia disgranosa – type locality for species
* †Eleutherokomma
* †Eleutherospira
** †Eleutherospira medfraensis
* † Ella – tentative report
** †Ella simensis – or unidentified related form
* †Ellesmeroceras
* Fossils at different stages of development of the Cambrian trilobite Elrathia †Elrathia
** †Elrathia alaskensis – type locality for species
* †Emanuella
** †Emanuella altus
** †Emanuella neumani
* †Emmonsia
* †Endothyra
** †Endothyra bowmani – or unidentified related form
* †Entactinia
** †Entactinia modesta
* †Enteletes – tentative report
* †Entelophyllum – tentative report
* †Entomis
** †Entomis pelagica
* †Eoasianites
* †Eoconchidium
* †Eognathodus
** †Eognathodus sulcatus
* †Eomarginifera
** †Eomarginifera longispinus
* †Eomoelleritia – tentative report
* †Eopteria
** †Eopteria richardsoni
* †Eoreticularia – tentative report
* †Eoschuchertella
* †Eospirifer
* †Epiphyton
* †Epitomyonia
** †Epitomyonia relicina
* †Euchondria – tentative report
** †Euchondria neglecta – or unidentified related form
* †Euconospira
** †Euconospira conula – or unidentified related form
* †Eumetria
** †Eumetria verneuiliana
* †Eunema
** †Eunema quadrisulcata – or unidentified comparable form
* †Euomphalopteris – tentative report
* †Euomphalopterus – type locality for genus
** †Euomphalopterus liratus – type locality for species
* Fossilized shell of the Silurian-Permian sea snail Euomphalus †Euomphalus
** †Euomphalus brooksensis
** †Euomphalus bundtzeni
** †Euomphalus planodorsatus – or unidentified related form
** †Euomphalus planorbis
** †Euomphalus utahensis – or unidentified related form
* †Euphemites
** †Euphemites carbonarius
* †Euryzone

## 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
* †Faberophyllum
* †Falodus
* †Farewellia – type locality for genus
** †Farewellia heidelbergerae – type locality for species
* †Fasciculatia
** †Fasciculatia striatoparadoxa
* †Fasciphyllum – tentative report
* Fossil of the Late Ordovician-Permian tabulate coral Favosites †Favosites
** †Favosites emmonsi – or unidentified comparable form
** †Favosites hemispericus
** †Favosites hemisphericus
** †Favosites limitaris
** †Favosites radiciformis
* †Fenestella
* †Filigreenia
** †Filigreenia circularis
* †Finkelnburgia
* †Fistulella
** †Fistulella undosa
* †Fistulipora
* †Fletcheria – tentative report
* †Fluctuaria
** †Fluctuaria undata – or unidentified related form
* †Follicucullus
** †Follicucullus monacanthus – or unidentified related form
* †Foordites
** †Foordites platypleura – or unidentified comparable form
* †Fusispira
* Assemblage of fossils of Silurian-Permian fusulinid foraminiferans †Fusulina
** †Fusulina elongata – or unidentified related form
* †Fusulinella
** †Fusulinella eopulchra – or unidentified comparable form

## 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
* †Gasterocoma – tentative report
** †Gasterocoma bicauli
* †Gastrioceras
** †Gastrioceras nolinense – or unidentified related form
* †Gelidorthis
** †Gelidorthis perisiberiaensis
* Fossil of the Early-Late Ordovician trilobite Geragnostus †Geragnostus
* †Gervillia
** †Gervillia longa – or unidentified related form
* †Girtyella
* †Girtyocoelia – type locality for genus
** †Girtyocoelia epiporata
** †Girtyocoelia minima
* †Girvanella
** †Girvanella problematica
* †Glaberagnostus
** †Glaberagnostus cicer
* †Glabrocingulum
** †Glabrocingulum grayvillense – or unidentified related form
* †Globoendothyra
* †Glossograptus
** †Glossograptus dentatus – or unidentified comparable form
** †Glossograptus echinatus – or unidentified comparable form
** †Glossograptus hincksii
** †Glossograptus horridus
** †Glossograptus hystrix – or unidentified related form
* †Glyptograptus
** †Glyptograptus enodis – or unidentified comparable form
** †Glyptograptus gnomus
** †Glyptograptus incertus
** †Glyptograptus laciniosus
** †Glyptograptus lanpherei
** †Glyptograptus tamariscus
* †Glyptopora
* †Gomphoceras
* †Goniatites
* †Goniocladia – tentative report
* †Goniophora
** †Goniophora thula – type locality for species
* †Grammysia
* †Granularaspis
* †Graptospongia
* Multiple views of a fossil of the Ordovician horn coral Grewingkia †Grewingkia
* †Grypophyllum
* †Gypidula
** †Gypidula cornuta
** †Gypidula intervenicus – or unidentified comparable form
** †Gypidula optatus
** †Gypidula orbitatus
** †Gypidula pelagica
** †Gypidula perryi
** †Gypidula upatensis
* †Gypiduloides
** †Gypiduloides craigenensis
* †Gypospirifer
** †Gypospirifer condor
* †Gyronema

## H

* 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
* †Hallograptus
** †Hallograptus mucronatus
* †Halysites
* †Haplistion – tentative report
* †Haplospira
** †Haplospira craigi – type locality for species
* †Hardyoides
** †Hardyoides aspinosa – type locality for species
* †Harperoides – type locality for genus
** †Harperoides alaskensis – type locality for species
* Fossil of the Devonian trilobite Harpides †Harpides
* †Harpidium
** †Harpidium insignis
** †Harpidium latus
** †Harpidium rotundus
* †Hartshillia
** †Hartshillia clivosa
* †Hecetaphyton
** †Hecetaphyton alaskense
* †Hecetastoma – type locality for genus
** †Hecetastoma gehrelsi – type locality for species
* †Hedstroemia – tentative report
* †Hedstromophyllum
* †Helicotoma
** †Helicotoma blodgetti – type locality for species
** †Helicotoma robinsoni – type locality for species
* †Heliolites
* †Heliophyllum
* †Helioplasmolites
* Fossil of the Cambrian trilobite Hemirhodon †Hemirhodon
* †Hemitrypa
* †Hercynella
** †Hercynella bohemica
** †Hercynella nobilis
* †Hexagonaria
* †Hindeodus
* †Holopea
* †Holopella
* †Homagnostus
** †Homagnostus alaskensis – type locality for species
* †Hormospongia – type locality for genus
** †Hormospongia acara – type locality for species
** †Hormospongia diarteria – type locality for species
** †Hormospongia labyrinthica – type locality for species
* †Hormotoma
* †Horridonia
** †Horridonia horrida
* †Hostimella
* †Howellella
** †Howellella amsdeni
** †Howellella nucula
** †Howellella yacutica
* †Howellites
** †Howellites amsdeni – type locality for species
* †Howittia
** †Howittia haideri
* †Hustedia
** †Hustedia meekana – or unidentified related form
** †Hustedia remota – or unidentified related form
* †Hustedograptus
** †Hustedograptus teretiusculus
* †Hypagnostus
* †Hypomphalocirrus
** †Hypomphalocirrus rugosus – or unidentified comparable form
* †Hypothyridina
** †Hypothyridina magister

## I

* 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
* †Icriodus
** †Icriodus angustoides
** †Icriodus taimyricus
* †Iddingsia
** †Iddingsia relativa – type locality for species
* †Idiognathodus
* †Idiostroma
* †Imperatoria
** †Imperatoria media
* †Iowaphyllum
** †Iowaphyllum johanni – or unidentified comparable form
* †Iowatrypa
** †Iowatrypa owenensis
* †Iskutella
** †Iskutella gunningi
* †Isochilina
* †Isograptus
** †Isograptus forcipiformis
** †Isograptus manubriatus – or unidentified comparable form
* †Isorthis
* †Ivdelinia

## 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
* †Janius
** †Janius velatus – or unidentified comparable form
* †Jedria
** †Jedria deckeri
* †Johnsonathyris – type locality for genus
** †Johnsonathyris adrianensis – type locality for species
* †Juraspis
** †Juraspis schabanovi
* †Juresania
** †Juresania juresanensis – or unidentified related form

## 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
* †Kahlerina
* †Karavankina
** †Karavankina fasciata – or unidentified related form
* †Ketophyllum
* †Kindleina – type locality for genus
** †Kindleina suemezensis – type locality for species
* Fossilized shells of the Middle Ordovician-Permian nautiloid cephalopod Kionoceras †Kionoceras
* †Kirkidium
* †Kirkirhynchus
** †Kirkirhynchus reesidei
* †Kirkospira – type locality for genus
** †Kirkospira glacialis – type locality for species
** †Kirkospira tongassensis – type locality for species
* †Kitikamispira
** †Kitikamispira ormistoni
* †Klakesia
* †Kochiproductus
** †Kochiproductus porrectus – or unidentified related form
* †Komiella
** †Komiella gilberti – type locality for species
** †Komiella ostiolata – or unidentified related form
* Fossil of the Cambrian trilobite Kootenia †Kootenia
** †Kootenia anabarensis – or unidentified comparable form
** †Kootenia granulospinosa – type locality for species
** †Kootenia serrata – or unidentified comparable form
* †Krausella
* †Krotovia
** †Krotovia pustulata – or unidentified related form
* †Kuskokwimia – type locality for genus
** †Kuskokwimia moorei – type locality for species
* †Kuvelousia
** †Kuvelousia sphiva
** †Kuvelousia weyprechti – or unidentified comparable form

## 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
* †Labechia
* †Labyrinthites
* †Lacunoporaspis
* Laevidentalium
** †Laevidentalium venustum – or unidentified related form
* †Laioporella
** †Laioporella pyramidata – or unidentified related form
* †Lamprophyllum
* †Latentifistula
* †Laticrura
** †Laticrura pionodema
* †Lecanospira – tentative report
* †Leioclema
* †Leiorhynchus
** †Leiorhynchus greenianum – or unidentified related form
* †Lejopyge
** †Lejopyge calva
** Illustration of a fossil of the Cambrian trilobite Lejopyge laevigata †Lejopyge laevigata
* †Leperditia
* †Lepidocoleus
** †Lepidocoleus britannicus
* †Leptaena
** †Leptaena alaskensis – type locality for species
* †Leptathyris
** †Leptathyris borki
* †Leptellina
** †Leptellina occidentalis
* †Leptelloidea
** †Leptelloidea leptelloides
* †Leptodesma
* †Leptograptus
* †Leptostrophia
* †Libumella – tentative report
* †Licharewia
* †Lichas
* †Ligiscus
** †Ligiscus smithi – type locality for species
* Lima
* †Linguagnostus
** †Linguagnostus gronwalli
* †Lingula
** †Lingula freboldi
* Linguopugnoides
** †Linguopugnoides carens
* †Linograptus
** †Linograptus posthumus – or unidentified related form
* †Linoproductus
** †Linoproductus cora
** †Linoproductus lineatus – or unidentified related form
** †Linoproductus tenuistriatus – or unidentified related form
* †Liosotella
** †Liosotella proboscidea – or unidentified comparable form
* †Liospira
** †Liospira micula
** †Liospira progne – or unidentified comparable form
* †Lissatrypa – tentative report
* †Lissochonetes
** †Lissochonetes geinitzianus – or unidentified related form
** †Lissochonetes morahensis – or unidentified related form
** †Lissochonetes superba – or unidentified comparable form
* †Lithostrotion
** †Lithostrotion mclareni
** †Lithostrotion portlocki – or unidentified related form
** †Lithostrotion sinuosum
** †Lithostrotion warreni
* †Lithostrotionella
** †Lithostrotionella banffensis
** †Lithostrotionella birdi
* †Loganograptus
* †Lonsdaleia
* †Lophophyllum
* †Lophospira
** †Lophospira perangulata – or unidentified comparable form
** †Lophospira serrulata – or unidentified related form
* †Loxonema
* †Loyolophyllum
* Fossilized shell of the Devonian-modern marine bivalve Lucina †Lucina
** †Lucina proavia – or unidentified comparable form
* †Ludlovia
** †Ludlovia multispora
* †Lunucammina
* †Lunulazona
** †Lunulazona sablei – type locality for species
* †Lykocustiphyllim – tentative report
* †Lyrielasma
* †Lytospira
** †Lytospira subrotunda
* †Lytvophyllum – tentative report
** †Lytvophyllum hongi

## 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
* †Macgeea
* †Maclurina
** †Maclurina manitobensis – or unidentified comparable form
* †Maclurites
** †Maclurites magnus – or unidentified related form
* †Marginifera
** †Marginifera involuta
** †Marginifera juresanensis – or unidentified comparable form
** †Marginifera lebedevi – or unidentified related form
** †Marginifera splendens – or unidentified related form
** †Marginifera typica – or unidentified related form
* †Marinurnula
** †Marinurnula timanicum – or unidentified comparable form
* †Marjumia
** †Marjumia callas
* †Martinia
** †Martinia maia – or unidentified comparable form
* †Martiniopsis
* †Mastigospira
** †Mastigospira weberae
* †Medfracaulus – type locality for genus
** †Medfracaulus cooki – type locality for species
** †Medfracaulus turriformis
* †Medfraspongia
** †Medfraspongia tubulara
* †Medfrazyga – type locality for genus
** †Medfrazyga clauticae – type locality for species
** †Medfrazyga gilmulli – type locality for species
* †Medlicottia
** †Medlicottia orbigiana – or unidentified related form
* †Meekella – tentative report
* †Meekospira
* †Megagnostus
** †Megagnostus laevis
** †Megagnostus resecta
* †Megalomus
* †Megousia
** †Megousia aagardi
* †Mehlina
* †Menophyllum – tentative report
* †Mephiarges – tentative report
* Illustration (lower right, entry 15) of a fossilized shell in front and side views of the Silurian-Late Devonian brachiopod Meristella †Meristella
** †Meristella barrisi – or unidentified comparable form
** †Meristella ceras – or unidentified comparable form
** †Meristella tumida – tentative report
* †Meristina
* †Mesodouvillina
* †Mesofavosites
* Mesophyllum
** †Mesophyllum dachsbergi
* †Metadoliolina – tentative report
* †Michelinia
* †Michelinoceras – tentative report
* †Micidus
** †Micidus stellae
* †Microplasma
* †Miculiella – or unidentified comparable form
* †Mizzia – tentative report
* †Modiolopsis
** †Modiolopsis modiolaris – or unidentified related form
* †Modiolus – tentative report
* †Modiomorpha
* †Modocia
** †Modocia compressa – type locality for species
** †Modocia transversa – type locality for species
* †Moelleritia
** †Moelleritia canadensis
* †Monadotoechia – tentative report
* Fossils of the Early Devonian graptolite Monograptus †Monograptus
** †Monograptus acinaces
** †Monograptus atavus
** †Monograptus bohemicus
** †Monograptus buddingtoni
** †Monograptus calamistratus
** †Monograptus clingani – or unidentified related form
** †Monograptus convolutus
** †Monograptus crenularis – or unidentified comparable form
** †Monograptus crinitus
** †Monograptus cyphus
** †Monograptus difformis – or unidentified comparable form
** †Monograptus dubius
** †Monograptus gregarius
** †Monograptus incommodus – or unidentified comparable form
** †Monograptus involutus – or unidentified comparable form
** †Monograptus nilssoni
** †Monograptus noyesensis
** †Monograptus pacificus
** †Monograptus praedubius – or unidentified related form
** †Monograptus priodon
** †Monograptus pseudodubius
** †Monograptus raitzhainesis – or unidentified related form
** †Monograptus revolutus
** †Monograptus scanicus
** †Monograptus tenuis
** †Monograptus thomasi – or unidentified related form
** †Monograptus tumescens
** †Monograptus uncinatus
** †Monograptus undulatus
** †Monograptus varians
** †Monograptus vulgaris – or unidentified comparable form
** †Monograptus yukonensis
* †Monolaminospongia – type locality for genus
** †Monolaminospongia gigantia – type locality for species
* †Monorakos
** †Monorakos kledos – type locality for species
* †Morania
** †Morania nixonforkensis – type locality for species
** †Morania wagneri – type locality for species
* Fossilized shell of the Devonian brachiopod Mucrospirifer †Mucrospirifer
** †Mucrospirifer refugiensis – type locality for species
* †Multiconus
* †Multisolenia
* †Murchisonia
* †Myalina
* †Myriospirifer
** †Myriospirifer myriofila – type locality for species
* †Mytilarca
** †Mytilarca boucoti – 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
* †Nankinella
* †Nanochilina
** †Nanochilina gubanovi – type locality for species
* †Nanukidium
** †Nanukidium cunninghamensis – or unidentified comparable form
* †Naticella
* Fossilized shell of the Early Devonian – Triassic sea snail Naticopsis †Naticopsis
** †Naticopsis bowsheri
** †Naticopsis carleyana – or unidentified related form
** †Naticopsis suturicompta
* †Nazarovella
* †Nemagraptus
** †Nemagraptus gracilis
* †Nematosalpinx
** †Nematosalpinx dichotomica
** †Nematosalpinx hormathodes – type locality for species
* †Neochonetes
** †Neochonetes granulifer – or unidentified related form
* †Neogondolella
** †Neogondolella idahoensis
* Fossilized shell of the Carboniferous-Permian brachiopod Neospirifer †Neospirifer
** †Neospirifer cameratus
** †Neospirifer fasciger – or unidentified related form
** †Neospirifer striatus – tentative report
* †Nezamyslia
** †Nezamyslia jucunda – or unidentified related form
* †Nicollidina
** †Nicollidina brevis
** †Nicollidina remscheidensis – or unidentified comparable form
* †Nileus
** †Nileus armadillo
* †Niobella
** †Niobella kanauguki – type locality for species
* †Nipponophyllum
** †Nipponophyllum aseptatum – or unidentified comparable form
* †Nodospira – type locality for genus
** †Nodospira ornata – type locality for species
* †Nordospira
** †Nordospira vostokovae – type locality for species
* †Nordotoechia – tentative report
* †Nowakia
** †Nowakia acuaria
** †Nowakia barrandei
** †Nowakia parabarrandei – type locality for species
* †Nucleospira
** †Nucleospira hecetensis
* Interior of a fossilized shell of the Early Ordovician-modern marine bivalve Nucula Nucula
** †Nucula shumardiana – or unidentified related form
* Nuculana – tentative report
* †Nuculites

## 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
* †Oanduporella
** †Oanduporella kuskokwimensis
* †Odontomaria
** †Odontomaria cheeneetnukensis – type locality for species
* †Odontospirifer
* †Oistodus
** †Oistodus parallelus
** †Oistodus venustus – or unidentified comparable form
* †Olenaspella
** †Olenaspella evansi
* †Oncagnostus
** †Oncagnostus tumidosus
* †Onchonotopsis
** †Onchonotopsis occidentalis – type locality for species
* †Oonoceras
* †Opsiconidion
* †Orbiculoidea
* †Orecopia
** †Orecopia mccoyi – or unidentified comparable form
* †Oriostoma
** †Oriostoma angulatum – or unidentified comparable form
** †Oriostoma princeps
* †Orthis
** †Orthis arcuata – or unidentified comparable form
* †Orthoceras
** †Orthoceras anguliferas – or unidentified comparable form
* †Orthograptus
** †Orthograptus bellulus
** †Orthograptus calcaratus
** †Orthograptus eberleini
** †Orthograptus insectiformis
** †Orthograptus mutabilis – or unidentified comparable form
** †Orthograptus quadrimucronatus
** †Orthograptus truncatus
** †Orthograptus vesiculosus
* †Orthonota
* †Orthonychia
* †Orthophyllum – tentative report
* †Orthotetes
** †Orthotetes chemungensis – or unidentified comparable form
** †Orthotetes crenistria
** †Orthotetes keokuk – or unidentified related form
* †Orthotichia – tentative report
** †Orthotichia morganiana – or unidentified related form
* †Ortonia – tentative report
* †Oulodus
* †Overtonia – tentative report
** †Overtonia fimbriata – or unidentified related form
* †Ozarkodina
** †Ozarkodina confluens
** †Ozarkodina eberleini – type locality for species
** †Ozarkodina paucidentata – or unidentified comparable form

## 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
* †Pachyfavosites
* †Pachyphloia
* †Pachypora
* †Pachystrophia
** †Pachystrophia devexa – or unidentified comparable form
** †Pachystrophia gotlandicus
* †Paeckelmanella
** †Paeckelmanella dieneri – or unidentified related form
* †Paffrathopsis
** †Paffrathopsis nana – or unidentified related form
* Fossil of the Cambrian trilobite Pagetia †Pagetia
* †Palaeolima
** †Palaeolima retifera – or unidentified related form
* †Palaeophyllum – or unidentified comparable form
* †Palaeoscheda
** †Palaeoscheda crassimuralis
* †Palaeowingella – type locality for genus
** †Palaeowingella farewellensis – type locality for species
* †Palaeozygopleura
* †Paleofavosites
* †Paleoxyphostylus
** †Paleoxyphostylus variospina
* †Palliseria
** †Palliseria robusta
* †Panderodus
** †Panderodus gracllis – or unidentified comparable form
* †Pandorinellina
** †Pandorinellina exigna
** †Pandorinellina exigua
** †Pandorinellina expansa
** †Pandorinellina steinhornensis
* †Panenka
* †Paracybantyx
** †Paracybantyx occidentalis – type locality for species
* Fossil of the Cambrian trilobite Paradoxides †Paradoxides
* †Parafusulina – tentative report
* †Paraglossograptus
** †Paraglossograptus tentaculatus – or unidentified comparable form
* †Paraliospira
** †Paraliospira angulata
** †Paraliospira mundula
** †Paraliospira planata – or unidentified related form
* †Parallelodon
* †Paraparchites
** †Paraparchites carbonarius – or unidentified related form
* †Paraphillipsia
** †Paraphillipsia aglypta – type locality for species
* †Parapugnax
** †Parapugnax schmidti
* †Pararachnastraea
** †Pararachnastraea gracilis – or unidentified related form
* †Parasolenopleura
* †Parastriatopora
* †Parawedekindellina
** †Parawedekindellina pechorica – or unidentified comparable form
* †Parehmania
** †Parehmania lata – or unidentified comparable form
* †Parisograptus
** †Parisograptus caduceus
* †Paronaella – tentative report
** †Paronaella triporosa
* †Paupospira
** †Paupospira burginensis – or unidentified comparable form
* Fossils of the Late Devonian-Permian fern-like fronds Pecopteris †Pecopteris
** †Pecopteris arborescens
** †Pecopteris hemitelioides
** †Pecopteris unita
* †Pedderia – type locality for genus
** †Pedderia fragosa – type locality for species
* †Pelekysgnathus
** †Pelekysgnathus klamathensis
* †Pelypora
* †Peneckiella
* †Penekiella
* †Pentamerella
* Fossilized shell of the Silurian-Middle Devonian brachiopod Pentamerus †Pentamerus
* †Peridon
** †Peridon aculeatus
* †Perimecocoelia
** †Perimecocoelia semicostata
* †Permophricodothyris
** †Permophricodothyris nodosa – or unidentified comparable form
* †Pernipecten
* †Pernopecten
** †Pernopecten aviculatus – or unidentified related form
** †Pernopecten ohioensis – or unidentified related form
* †Peronopsis
** †Peronopsis gaspensis – or unidentified comparable form
* †Petalograptus
** †Petalograptus minor
** †Petalograptus palmeus
* †Petrozium
* †Phacellophyllum
* Fossil of the Cambrian trilobite Phalagnostus †Phalagnostus
** †Phalagnostus bituberculatus
* †Phanerotrema
* †Phaulactis
** †Phaulactis angusta – or unidentified comparable form
** †Phaulactis cyathophylloides – or unidentified comparable form
* †Phillipsastrea
* †Phillipsia
** †Phillipsia bufo – tentative report
** †Phillipsia majus – type locality for species
** †Phillipsia megalopos – type locality for species
* †Pholadostrophia – tentative report
* †Pholidocidaris
* †Phragmodus
* †Phragmorthis
** †Phragmorthis buttsi
* †Phricodothyris
** †Phricodothyris guadalupensis – or unidentified related form
* Fossil of the Early Ordovician graptolite Phyllograptus †Phyllograptus
** †Phyllograptus anna – or unidentified comparable form
* †Phylloporella – tentative report
* †Pinacites
** †Pinacites jugleri
* †Pinegathyris – report made of unidentified related form or using admittedly obsolete nomenclature
** †Pinegathyris royssiana – or unidentified related form
* †Pinna
* †Pinnatopora
* †Plagioglypta
* †Planitrochus
* †Plasmophyllum
* Fossilized shell of the Silurian-Early Triassic sea snail Platyceras †Platyceras
* †Platycrinites
** †Platycrinites nikondaense – type locality for species
* †Platycrinus
* †Platyschisma – tentative report
* Pleurotomaria
* †Plicogypa
** †Plicogypa kayseri – or unidentified comparable form
* Various conodont elements, including those of Polygnathus (specimens 8, 10, and 11) †Polygnathus
** †Polygnathus alexanderensis
** †Polygnathus angusticostatus
** †Polygnathus angustipennatus
** †Polygnathus aspelundi
** †Polygnathus borealis
** †Polygnathus brevis
** †Polygnathus churkini
** †Polygnathus costatus
** †Polygnathus eberleini
** †Polygnathus eiflius
** †Polygnathus inversus
** †Polygnathus kennettensis
** †Polygnathus linguiformis
** †Polygnathus pacificus
** †Polygnathus parawebbi
** †Polygnathus perbonus – or unidentified related form
** †Polygnathus praetrigonicus
** †Polygnathus pseudofoliatus
** †Polygnathus robusticostatus
** †Polygnathus samueli
** †Polygnathus sinuosus
** †Polygnathus trigonicus
** †Polygnathus unicornis
** †Polygnathus xylus
* †Polyplacospongia – type locality for genus
** †Polyplacospongia nodosa – type locality for species
* †Polypora
* †Polythalamia
** †Polythalamia americana
* †Prampyx
** †Prampyx difformis
* †Prioniodina
** †Prioniodina flabellum
* †Prisochiton
* †Proampyx
** †Proampyx acuminatus
* †Prodentalium
* †Productella
** †Productella hallana
* †Productus
** †Productus burlingtonesis – or unidentified related form
** †Productus gallatinenesis – or unidentified related form
** †Productus giganteus
** †Productus gruenwaldti – or unidentified related form
** †Productus hirsutiformis
** †Productus inflatus – or unidentified related form
** †Productus jakovlevi – or unidentified related form
** †Productus longus – or unidentified related form
** †Productus mesialis – or unidentified related form
** †Productus ovatus – tentative report
** †Productus sampsoni – or unidentified related form
** †Productus samsoni – or unidentified related form
** †Productus setiger – or unidentified related form
** †Productus striatus – or unidentified related form
* Restoration of the Silurian trilobite Proetus †Proetus
** †Proetus romanooski
* †Prohedinia
** †Prohedinia brevifrons
* †Protathyris
** †Protathyris pacificana
* †Proteoceras
** †Proteoceras obliquum
** †Proteoceras tubulara
* †Protolonsdaleiastraea
** †Protolonsdaleiastraea cargalensis – or unidentified related form
* †Protowentzelella
** †Protowentzelella cystosa
* †Pseudagnostus
** †Pseudagnostus communis
* †Pseudamplexus
** †Pseudamplexus princeps – or unidentified comparable form
* †Pseudoalbaillella
** †Pseudoalbaillella longicornis – or unidentified related form
* Fossil of the Silurian-Devonian horn coral Pseudoamplexus †Pseudoamplexus
** †Pseudoamplexus altaicus
* †Pseudobelodina
** †Pseudobelodina adentata – or unidentified comparable form
** †Pseudobelodina vulgaris – or unidentified related form
* †Pseudobornia
** †Pseudobornia ursina
* †Pseudoclimacograptus
** †Pseudoclimacograptus marathonensis – or unidentified comparable form
** †Pseudoclimacograptus scharenbergi
** †Pseudoclimacograptus undulatus – or unidentified comparable form
* †Pseudocryptaenia – tentative report
** †Pseudocryptaenia majewskwi – type locality for species
* †Pseudodoliolina
** †Pseudodoliolina oliviformis
* †Pseudofusulinella
** †Pseudofusulinella praeantiqua – or unidentified comparable form
* †Pseudoharttina
** †Pseudoharttina kayi – type locality for species
* Fossilized shell of a Pseudomelania sea snail †Pseudomelania
* †Pseudomicroplasma – report made of unidentified related form or using admittedly obsolete nomenclature
* †Pseudomonotis – tentative report
* †Pseudomphalotrochus
** †Pseudomphalotrochus linsleyi
* †Pseudophillipsia – tentative report
* †Pseudophorus
** †Pseudophorus profundus – or unidentified comparable form
* †Pseudoporefieldia
** †Pseudoporefieldia micella
* †Pseudotryplamsa – tentative report
** †Pseudotryplamsa altaica – or unidentified comparable form
* †Pseudotryplasma
** †Pseudotryplasma altaica – or unidentified comparable form
** †Pseudotryplasma altaicus – or unidentified comparable form
* †Psilocamara
* Fossil of the primitive Devonian vascular plant Psilophyton †Psilophyton
* †Pteria – report made of unidentified related form or using admittedly obsolete nomenclature
* †Pterinea
* †Pterinopecten
* †Pterocephalia
** †Pterocephalia constricta – type locality for species
* †Pterospirifer
** †Pterospirifer alatus
* †Ptychagnostus
** †Ptychagnostus aculeatus
** †Ptychagnostus puncturosus
* †Ptychoglyptus
** †Ptychoglyptus alaensis – type locality for species
** †Ptychoglyptus pauciradiatus
* †Ptychomphalina
* †Ptychophyllum
* †Ptychopleurella
** †Ptychopleurella uniplicata
* †Pugnax
** †Pugnax pugnus
** †Pugnax utah – or unidentified related form
* †Pulchratia – tentative report
* †Purdonella – report made of unidentified related form or using admittedly obsolete nomenclature
** †Purdonella nikitini – or unidentified related form
* †Pustula
** †Pustula alternata – or unidentified related form
** †Pustula biseriata – or unidentified related form
** †Pustula blairi – or unidentified related form
** †Pustula carringtoniana – or unidentified related form
** †Pustula concentrica – or unidentified related form
** †Pustula distorta – or unidentified related form
** †Pustula eximia – or unidentified related form
** †Pustula indianensis – or unidentified related form
** †Pustula irginae – or unidentified related form
** †Pustula magnituberculata – or unidentified related form
** †Pustula millespinosa – or unidentified related form
** †Pustula morbilliana – or unidentified related form
** †Pustula nikitini – or unidentified related form
** †Pustula pilosa – or unidentified related form
** †Pustula plicatilis – or unidentified related form
** †Pustula pseudaculeata – or unidentified related form
** †Pustula punctata
** †Pustula rugata – or unidentified related form
** †Pustula semicostata – or unidentified related form
** †Pustula spinulosa – or unidentified related form
** †Pustula subhorrida – or unidentified related form
** †Pustula tuberculata – or unidentified related form
** †Pustula wallaciana – or unidentified related form
** †Pustula wallacianus – or unidentified related form
* †Pycnactis – tentative report
* †Pycnolithus – tentative report
* †Pylentonema
** †Pylentonema antiqua – or unidentified comparable form

## 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
* †Quadricarina
** †Quadricarina noklebergi – type locality for species
* †Quasifusulina
** †Quasifusulina longissima – or unidentified related form
* †Quebecaspis
** †Quebecaspis aspinosa – type locality for species
** †Quebecaspis conifrons – tentative report

## 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
* †Rachiopteris
* †Raphistoma – tentative report
** †Raphistoma alaskensis – type locality for species
* †Raphistomina
** †Raphistomina rugata – or unidentified comparable form
* †Rastrites
** †Rastrites longispinus – or unidentified comparable form
** †Rastrites peregrinus – or unidentified related form
* Fossil of the Early Ordovician-Permian benthic alga Receptaculites †Receptaculites
* †Rectograptus
** †Rectograptus amplexicaulis
* †Remipyga
* †Renalcis
** †Renalcis tuberculatus – or unidentified comparable form
* †Reteograptus
** †Reteograptus geinitzianus
* †Reticularia
** †Reticularia setigera – or unidentified related form
* †Reticulariopsis
** †Reticulariopsis bicollina
* †Retiolites
** †Retiolites geinitzianus
* †Retispira
** †Retispira sullivani
* †Reuschia
* †Rhabdomeson
* †Rhabdostropha
** †Rhabdostropha primitiva
* †Rhaphidophyllum
* †Rhenozyga
** †Rhenozyga reifenstuhli – type locality for species
* †Rhineoderma – tentative report
** †Rhineoderma wortheni – or unidentified related form
* †Rhipidomella
** †Rhipidomella carbonaria – or unidentified related form
** †Rhipidomella nevadensis – or unidentified related form
** †Rhipidomella uralica – or unidentified related form
* †Rhizophyllum
** †Rhizophyllum schischkaticum
* †Rhombopora
* Fossilized shell of the Silurian-Eocene articulate brachiopod Rhynchonella †Rhynchonella
** †Rhynchonella amalthea – or unidentified comparable form
** †Rhynchonella livonica
* †Rhynchopora
** †Rhynchopora beecheri – or unidentified related form
** †Rhynchopora geinitziana – or unidentified related form
** †Rhynchopora kochi – or unidentified comparable form
** †Rhynchopora nikitini – or unidentified related form
* †Rhytiodentalium
** †Rhytiodentalium kentuckyensis – or unidentified comparable form
* †Richardsonella
* †Richthofenia
** †Richthofenia lawrenciana – or unidentified related form
* †Rigbyetia
** †Rigbyetia obconica
* †Roadoceras
** †Roadoceras roadense – or unidentified comparable form
* †Roemeria – or unidentified comparable form
* †Rothpletzella
** †Rothpletzella gotlandica
* †Rousseauspira
** †Rousseauspira teicherti
* †Rugaltarostrum
** †Rugaltarostrum congregabile – type locality for species
* †Rugatia
** †Rugatia occidentalis – or unidentified related form
* †Rugivestis
** †Rugivestis girtyi – type locality for species
* †Rugosatrypa
** †Rugosatrypa flexibilis

## 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
* †Salairophyllum
* †Sanguinolites
* †Sannemannia
** †Sannemannia glenisteri – or unidentified related form
* †Sarcinula
* †Savagerhynchus – type locality for genus
** †Savagerhynchus hecetaensis – type locality for species
* †Scalites
** †Scalites tellerensis – type locality for species
* †Scaphina – tentative report
* †Scaphorthis
** †Scaphorthis virginiensis
* †Scharfenbergia
** †Scharfenbergia concentrica
** †Scharfenbergia impella
** †Scharfenbergia ruestae
** †Scharfenbergia tailleurense
* †Scharyia
* †Schizodus
* †Schizophoria
** †Schizophoria fragilis – or unidentified comparable form
** †Schizophoria macfarlani
** †Schizophoria striatula
** †Schizophoria swallowi – or unidentified related form
* †Schizoproetoides – tentative report
* †Schmidtella
* †Schrenkiella
** †Schrenkiella schrenki – or unidentified comparable form
* †Schuchertella
* †Schwagerina
** †Schwagerina jenkinsi – or unidentified comparable form
* †Sciophyllum
** †Sciophyllum alaskaensis
** †Sciophyllum lambarti
* †Scotoharpes
** †Scotoharpes raaschi – or unidentified related form
* †Semicoccinium – tentative report
* †Semicyclus
** †Semicyclus brabbi
* †Semisphaerocephalus
** †Semisphaerocephalus latus – type locality for species
* †Septabrunsiina
* †Septacamera
** †Septacamera kutorgae
** †Septacamera opitula – tentative report
** †Septacamera pybensis – type locality for species
** †Septacamera stupenda – type locality for species
* †Septaglomospiranella
* †Septimyalina
** †Septimyalina perattenuata – or unidentified related form
* †Septopora – tentative report
* †Serpulospira
* †Shumardella
** †Shumardella missouriensis
* †Sibirirhynchia
** †Sibirirhynchia alata
* †Sibiritia
* †Sibiritoechia – tentative report
** †Sibiritoechia sylvia
* †Sieberella
* †Sigmocheilus – tentative report
** †Sigmocheilus compressus – type locality for species
* †Sinutropis
** †Sinutropis esthetica – type locality for species
** †Sinutropis spiralis – type locality for species
* †Siphonophrentis – tentative report
* †Siskiyouspira
* †Skenidioides
** †Skenidioides multifarius
* †Smithiphyllum
* †Sociophyllum
** †Sociophyllum glomerulatum – or unidentified comparable form
* †Solenopleura
* Fossils of the red alga Solenopora †Solenopora
** †Solenopora compacta
** †Solenopora filiformis
* †Solenopsis – tentative report
* †Sowerbina
** †Sowerbina timanica – or unidentified comparable form
* †Sowerbyella
** †Sowerbyella praecursor – type locality for species
** †Sowerbyella rectangularis – type locality for species
* †Spathognathodus
** †Spathognathodus inclinatus
* †Spencella
** †Spencella acanthina
** †Spencella montanensis
* †Sphaerina
** †Sphaerina congregata
* Assemblage of fossils of the Ordovician-Triassic blue-green alga Sphaerocodium †Sphaerocodium
* †Sphaerodoma
* †Sphenosteges
** †Sphenosteges hispidus – or unidentified related form
* †Spinatrypa
** †Spinatrypa spinosa
** †Spinatrypa trulla – or unidentified comparable form
* †Spinicharybdis
** †Spinicharybdis boucoti – type locality for species
** †Spinicharybdis krizi – type locality for species
* †Spinulrichospira – type locality for genus
** †Spinulrichospira cheeneetnukensis – type locality for species
** †Spinulrichospira churkini – type locality for species
* Fossilized shell of the Late Ordovician-Late Triassic brachiopod Spirifer †Spirifer
** †Spirifer allatus – or unidentified related form
** †Spirifer anossofi
** †Spirifer bifurcatus – or unidentified related form
** †Spirifer bisulcatus – or unidentified related form
** †Spirifer cheiropteryx – or unidentified comparable form
** †Spirifer disjunctus
** †Spirifer duplicicostatus
** †Spirifer hians
** †Spirifer incertus – or unidentified related form
** †Spirifer indeferens
** †Spirifer keokuk – or unidentified related form
** †Spirifer missouriensis – or unidentified related form
** †Spirifer mosquensis – or unidentified related form
** †Spirifer pellensis – or unidentified related form
** †Spirifer schellwieni – or unidentified related form
** †Spirifer subcomprimatus
** †Spirifer thetides – or unidentified comparable form
** †Spirifer thetidis
* †Spiriferella
** †Spiriferella arctica
** †Spiriferella artica
** †Spiriferella interplicata – or unidentified related form
** †Spiriferella keilhavii
** †Spiriferella pseudotibetana
* †Spiriferellina
** †Spiriferellina cristata – or unidentified related form
* †Spiriferina
** †Spiriferina holtzapfeli – or unidentified related form
** †Spiriferina panderi – or unidentified related form
* †Spiriferinaella
** †Spiriferinaella artiensis – or unidentified related form
** †Spiriferinaella tastubensis – or unidentified related form
* Modern shells of the polychaete worm Spirorbis Spirorbis
* †Spongophyllum
* †Spyroceras
* †Squamularia
* †Stauria
* †Stegocoelia – tentative report
* †Stelliporella
* †Stenoloron
** †Stenoloron swallovana – or unidentified related form
* †Stenopora
* †Stenorhynchia
* †Stenoscisma
** †Stenoscisma bisinuata – or unidentified related form
** †Stenoscisma crumena – or unidentified related form
** †Stenoscisma margaritovi
** †Stenoscisma mutabilis – or unidentified related form
** †Stenoscisma purdoni – or unidentified related form
** †Stenoscisma spitzbergiana
* †Stictopora
* †Stigmosphaerostylus
** †Stigmosphaerostylus itsukaichiensis
* †Stipespongia – type locality for genus
** †Stipespongia laminata – type locality for species
* †Straparollina
** †Straparollina circe
** †Straparollina eurydice – or unidentified comparable form
* †Straparollus
** †Straparollus spergenensis – or unidentified related form
* †Streblopteria
** †Streblopteria montpelierensis – or unidentified related form
* †Streblotrypa – tentative report
* †Streptacis
** †Streptacis subgracilis – or unidentified related form
* †Streptorhynchus
** †Streptorhynchus pelargonatum – or unidentified related form
** †Streptorhynchus pelargonatus – or unidentified related form
* †Streptotrochus
** †Streptotrochus amicus – or unidentified comparable form
* †Striatifera
** †Striatifera ischmensis – or unidentified related form
* †Striatopora
* †Striatostyliolina
* †Stringocephalus
** †Stringocephalus burtini
* †Stringophyllum
* †Strobeus
* †Stromatopora
* †Strophalosia – tentative report
* Fossilized shell of the Ordovician-Silurian brachiopod Strophomena †Strophomena
** †Strophomena comitans
** †Strophomena fugax – or unidentified comparable form
** †Strophomena planobesa
** †Strophomena stephani
* †Strophonella
* †Strophostylus
* †Styliolina
** †Styliolina fissurella
* †Subanarcestes – tentative report
* †Sumatrina – tentative report
* †Svalbardia
** †Svalbardia toulai
* †Sycidium
* Fossil of the Devonian tabulate coral Syringopora †Syringopora
** †Syringopora formosa – type locality for species
** †Syringopora obesa
** †Syringopora rockfordensis
** †Syringopora schulzei
* †Syringoporella
** †Syringoporella rara – type locality for species
* †Syringoporinus
* †Syringothyris

## 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
* †Tabularia
* †Tabulophyllum
* Fossils of the Devonian plant stem morphogenus Taeniocrada †Taeniocrada
* †Taimyrophyllum
* †Taimyrrhynx
** †Taimyrrhynx taimyrico
* †Taphrorthis
** †Taphrorthis immatura
* †Tchaiaspis
* †Tcherskidium
** †Tcherskidium unicum
* †Teganium
* †Teguliferina – tentative report
* †Teichertina
* †Telinopsis
* Fossilized shell of the Early Ordovician-Late Devonian probable mollusc Tentaculites †Tentaculites
* †Tenticospirifer
** †Tenticospirifer wadleighensis
* †Terrakea – tentative report
* †Tersella
** †Tersella sainsburyi – type locality for species
* †Tetradium
* †Tetragraptus
** †Tetragraptus quadribrachiatus – or unidentified comparable form
* †Tetraprioniodus – tentative report
* †Thamniscus – tentative report
* †Thamnophyllum
* †Thamnopora
* †Thamnosia
** †Thamnosia arctica
* †Thecostegites
* †Theodossia
** †Theodossia albertoensis
* †Tholifrons – type locality for genus
** †Tholifrons adevna – type locality for species
** †Tholifrons minutus – type locality for species
* †Thysanophyllum
** †Thysanophyllum astraeiforme
** †Thysanophyllum orientale
* †Tiramnia
** †Tiramnia greenlandica
* †Tityrophora – tentative report
* †Tollina
* †Tortodus
** †Tortodus kockelianus
** †Tortodus kockeliensis
* †Torynifer
** †Torynifer pseudolineatus – or unidentified related form
* †Tostonia
* †Trabeculites
* †Transridgeia – type locality for genus
** †Transridgeia costata – type locality for species
* †Trapezophyllum
* †Tremanotus
* †Trepospira – tentative report
* †Triaenosphaera
** †Triaenosphaera hebes
* Restoration showing the top (left) and underside of the Late Ordovician trilobite Triarthrus †Triarthrus
* †Trigonirhynchia
** †Trigonirhynchia ventricosa – or unidentified related form
* †Triplophyllum
* †Triticites
* †Trochomphalus
** †Trochomphalus dimidiatus
* †Trochonema
** †Trochonema retrorsum – or unidentified related form
** †Trochonema wartheni
* †Trochonemella
** †Trochonemella churkini – type locality for species
** †Trochonemella reusingi – type locality for species
* †Tropidodiscus
* †Tryplasma
* †Tscherkidium
* †Tuberculatella
** †Tuberculatella tuberculata – or unidentified related form
* †Tubina
* †Turbonellina
** †Turbonellina chatzepovkensis – or unidentified related form
* †Turbospongia – type locality for genus
** †Turbospongia biperforata – type locality for species
* †Turrilepas
** †Turrilepas type locality for species A – informal
* †Tuxekanella
** †Tuxekanella simplex

## 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
* †Ulungaratoconcha – type locality for genus
** †Ulungaratoconcha heidelbergeri – type locality for species
* †Uncinulus – report made of unidentified related form or using admittedly obsolete nomenclature
** †Uncinulus polaris
* †Undatrypa
* †Uniconus
** †Uniconus livnensis
** †Uniconus orbiculus
* †Uraloceras
** †Uraloceras burtiense
** †Uraloceras fedorowi
** †Uraloceras involutum
** †Uraloceras nevadense

## 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
* †Verbeekina
* †Verneuilia
** †Verneuilia langenstrasseni – type locality for species
* †Virgulaspongia – type locality for genus
** †Virgulaspongia uniforma – type locality for species
* †Viriatellina – or unidentified comparable form
** †Viriatellina gemuendina

## 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
* †Waagenites
** †Waagenites trapezoidalis – or unidentified related form
* †Waagenoconcha
** †Waagenoconcha humboldti
** †Waagenoconcha irginae – or unidentified comparable form
** †Waagenoconcha irginaeformis – or unidentified comparable form
** †Waagenoconcha payeri
** †Waagenoconcha tastubensis
* †Warrenella
* †Wedekindellina
** †Wedekindellina uralica
* †Westbroekina
** †Westbroekina chacoensis
* †Westergaardodina
* †Whidbornella
** †Whidbornella lachrymosa – or unidentified comparable form
* †Whitfieldella
* †Wilberrya
* †Winterbergiella
** †Winterbergiella binodosa – or unidentified related form
* Restoration of the Permian shark Wodnika †Wodnika
** †Wodnika borealis

## 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
* †Xenambonites
** †Xenambonites revelatus
* †Xystriphyllum
** †Xystriphyllum devonicum
** †Xystriphyllum gorskii
** †Xystriphyllum schluteri

## 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
* †Yabeina
* †Yacutipora
* †Yakovlevia
** †Yakovlevia greenlandica – or unidentified comparable form
** †Yakovlevia mammata
** †Yakovlevia multistriata – or unidentified related form

## 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
* †Zacanthoides
* †Zamiopteris
* †Zaphrenthis
** †Zaphrenthis gigantea
* †Zelophyllum
* †Zonophyllum
* †Zygopleura