List of the Paleozoic life of Utah
This list of the Paleozoic life of Utah contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Utah and are between 541 and 252.17 million years of age.
A
- † Acanthopecten
- † Acanthopecten carboniferus
- † Acanthopecten coloradoensis
- † Achlysopsis
- † Achlysopsis liokata – or unidentified comparable form
- † Achlysopsis punctatum
- † Acidiphorus
- † Acidiphorus brevis – or unidentified comparable form
- † Acidiphorus brevus
- † Acidiphorus brighti
- † Acidiphorus pseudobathurus
- † Acidiphorus unicorna – type locality for species
- † Acidiphorus wahwahensis
- † Acidiphorus williamsi – type locality for species
- † Acinocricus
- † Acinocricus stichus
- † Acodus
- † Acodus similaris
- † Acontiodus
- † Acontiodus coniformis
- † Acrothele
- † Acrothele subsidua
- † Acrotreta
- † Adiantites
- † Adiantites tenuifolius
- † Aesiocrinus
- † Aesiocrinus secundus – type locality for species
- † AgnostusAssemblage of fossils of the Cambrian trilobite Agnostus
- † Agnostus neglectus
- † Allorisma
- † Allorynchus
- † Alokistocare
- † Alokistocare carnatum
- † Alokistocare harrisi
- † Alokistocare idahoense
- † Alokistocare normale
- † Alokistocare subcoronatum
- † Alokistocarella
- † Alokistocarella brighamensis
- † Altiocculus
- † Altiocculus concavus
- † Altiocculus drumensis
- † Amblycranium
- † Amblycranium cornutum
- † Amblycranium linearus – type locality for species
- † Amblycranium variabile
- † Amecephalus
- † Amecephalus laticudum
- † Ameura – tentative report
- † Ammagnostus
- † Ammagnostus beltensis
- † Amphiscapha
- † Amplexizaphrentis
- † Amplexizaphrentis paucicinctus
- † Amplexizaphrentis spinulosus
- † Amplexizaphrentis subcrassus
- † Amplexocarina
- † Amplexus
- † Anabarochilna
- † Anabarochilna australis – or unidentified comparable form
- †Ananias
- † Ananias nevadensis – or unidentified related form
- † Ancillotoechia
- † Ancillotoechia perryi – type locality for species
- † Anemonaria
- † Anemonaria delicatula
- † Angulotreta
- † Angyomphalus
- † Angyomphalus regularis
- † Anidanthus
- † Anidanthus echaris
- † Anisopyge
- † Anisotrypa
- † Annularia
- † Annularia stellata
- † Annulispongia – type locality for genus
- † Annulispongia interrupta – type locality for species
- † AnomalocarisRestorative model of the Cambrian arthropod Anomalocaris
- † Anomalocaris nathorsti
- † Anomalorthis
- † Anomalorthis lambda
- † Anomalorthis oklahomensis
- † Anomalorthis utahensis
- † Anomphalus
- † Anomphalus rotulus
- † Anthaspidella
- † Anthracospirifer
- † Anthracospirifer increbescens
- † Anthracospirifer leidyi
- † Anthracospirifer occiduus
- † Antiquatonia
- † Antiquatonia portlockianus
- † Antiquatonia sulcatus – or unidentified comparable form
- † Apachella
- † Apatognathus
- † Aphelaspis
- † Aphelaspis haguei
- † Aphelotoxon
- † Aphelotoxon acuminata
- † Apheoorthis
- † Apheoorthis melita – or unidentified comparable form
- † Apheorthis
- † Apheorthis meeki – or unidentified comparable form
- † Archaeocalamites
- † Archaeocalamites scrobiculatus
- † Archaeocothurnus – tentative report
- † Archaeocothurnus bifida – type locality for species
- † Archaeoscyphia
- † Archaeoscyphia rossi
- † Archeocalamites
- † Archeocalamites radiatus
- † Archeoschyphia
- †ArchimedesFossils of the Carboniferous-Permian bryozoan Archimedes
- † Archimedes macfarlani
- † Archimedes owenanus
- † Arcuolimbus
- † Arenicolites
- † Arroyocrinus
- † Arroyocrinus stokesi – type locality for species
- † Arthrophycus – tentative report
- † Artisia
- † Asaphelina
- † Asaphellus – tentative report
- † AsaphiscusFossil of the Cambrian trilobite Asaphiscus
- † Asaphiscus wheeleri
- † Ascopora
- † Ascopora macellata
- † Astartella
- † Astartella subquadrata
- † Asterophyllites
- † Asterophyllites charaeformis
- † Asterophyllites equisetiformis
- † Asterophyllites longifolius
- † Athabaskia
- † Athabaskia bithus
- † Athabaskia wasatchensis
- † Athyridacid
- † Athyris
- † Athyris lamellosa
- † AtrypaFossilized shell of the Late Ordovician-Carboniferous brachiopod Atrypa
- † Atrypa hedei
- † Atrypa parva – or unidentified comparable form
- † Atrypid
- † Aulacoparia – tentative report
- † Aulacoparia quadrata
- † Aulacoparia venta
- † Aulacotheca
- † Aulacotheca campbellii
- † Aulacotheca hemingwayi
- † Aulopora – tentative report
- † Aviculopecten
- † Aviculopecten girtyi
- † Aviculopecten kaibabensis – or unidentified comparable form
- † Aviculopinna
- † Aviculopinna peracuta – tentative report
- † AysheaiaFossil of the Cambrian velvet worm relative Aysheaia
B
- † Babylonites
- † Babylonites conoideus
- † Bakevellia
- † Baltagnostus
- † Baltagnostus eurypyx
- † Barrandia – tentative report
- † Bathymyonia
- † Bathymyonia nevadensis
- † Bathyurellus
- † Bathyurellus feitleri
- † Bathyurellus pogonipensis
- † Bathyurellus pogonopensis
- † Bathyurellus teretus – type locality for species
- † Bathyuriscus
- † Bathyuriscus brighamensis
- † Bathyuriscus elegans
- † Bathyuriscus fimbriatus
- † Bathyuriscus wasatchensis
- † Bayfieldia
- † Bearriverops
- † Bearriverops alsacharovi – type locality for species
- † Bearriverops borderinnensis – type locality for species
- † Bearriverops deltaensis – type locality for species
- † Bearriverops ibexensis – type locality for species
- † Bearriverops loganensis
- †Beckwithia
- † Beckwithia typa
- † Belemnospongia
- † Belemnospongia neofascicularis – type locality for species
- † Bellazona
- † Bellazona bella
- † Bellazona polita – type locality for species
- † Bellefontia
- † Bellefontia acuminiferentis
- † Bellefontia chamberlaini
- † Bellefontia ibexensis
- † Benthamaspis
- † Benthamaspis diminutiva
- † Benthamaspis gibberula – type locality for species
- † Benthamaspis obrepta
- † Beyrichoceras
- † Bighornia
- † Billingsella
- † Biscoia
- † Blastoidocrinus
- † Blastoidocrinus carchariaedens – or unidentified comparable form
- † Blountia
- † Bolaspidella
- † Bolaspidella contracta
- † Bolaspidella housensis
- † Bolaspidella type locality for species – informal
- † Bolaspidella wellsvillensis
- † Bolbocephalus
- † Bollandoceras
- † Bollandoceras occidentale – type locality for species
- † Bonneterrina
- † Bourbonnella
- † Bourbonnella jocelynae – type locality for species
- † Bowmania
- † Brachyaspidion
- † Brachyaspidion microps
- † Brachyaspidion sulcatum
- † Brachyprion
- † Brachyprion geniculata
- † Brachythyris
- † BranchiocarisLife restoration of the mysterious Cambrian animal Branchiocaris
- † Branchiocaris pretiosa
- † Brassicicephalus
- † Breckwithia
- † Breckwithia typa
- † Brodioptera
- † Brodioptera stricklani – type locality for species
- † Bromella
- † Brooksella
- † Bucania
- † Bythicheilus
- † Bythicheilus typicum
C
- † Cactocrinus
- † Cactocrinus arnoldi
- † CalamitesFossilized stems from the Carboniferous-Permian horsetail relative Calamites
- † Calamites cistii – or unidentified comparable form
- † Calamites cistiiformis
- † Calamites gigas
- † Calamites hesperius
- † Calamites infractus
- † Calamites suckowii
- † Calamostachys – tentative report
- † Calathium
- † Calathium yersini – type locality for species
- † Callipteris – tentative report
- † Callocladia
- † Callocladia jensensis
- † Calycocoelia
- † Calygirtyoceras
- † Calygirtyoceras arcticum
- † Calygirtyoceras confusionense – type locality for species
- † Camarotoechia
- † Cambromedusa – type locality for genus
- † Cambromedusa furcula – type locality for species
- † Camerella
- † Campbelloceras – tentative report
- † CanadaspisLife restoration of the Cambrian arthropod Canadaspis (left)
- † Canadaspis perfecta – or unidentified comparable form
- †Canadia
- † Canadiphyllum
- † Cancrinella
- † Cancrinella phosphatica – or unidentified comparable form
- † Caninaphyllum
- † Caninaphyllum incrussatum
- †Caninia
- † Caninia torquia
- † Caninophyllum
- † Canthylotreta
- † Canthylotreta marjumensis
- † Cardiomorpha
- † Cardiopteris
- † Cardiopteris hirta – or unidentified comparable form
- † Carolinites
- † Carolinites ekphymosus
- † Carolinites genacinaca – type locality for species
- † Carolinites killarnyensis
- † Carolinites killaryensis
- † Castericystis
- † Castericystis sprinklei – type locality for species
- † Castericystis vali – type locality for species
- † Catoraphiceras
- † Catoraphiceras colon
- † Caulpsis
- † Caulpsis punctata
- † Cavusgnathus
- † Cavusgnathus regularis
- † Cavusgnathus unicornis
- † CedariaFossil of the Cambrian trilobite Cedaria
- † Cedaria minor
- † Cedarina – tentative report
- † Cenorhynchia
- † Cenorhynchia type locality for species A – informal
- † Cernuolimbus
- † Cernuolimbus granulosus
- † Chaenomya
- † Chaetetes
- † Chaetetes milleporaceous
- † Chancelloria
- † Chancelloria eros
- † Chancelloria pentacta – type locality for species
- † Chancia (genus)
- † Chancia ebdome – or unidentified comparable form
- † Chanciaopsis – type locality for genus
- † Chanciaopsis heteromorphos – type locality for species
- † Chanciopsis
- † Chanciopsis heteromorphos
- † Cheilocephalus
- † Chilotrypa
- † ChoiaLife restoration of the Cambrian sponge Choia
- † Choia carteri
- † Choia hindei
- † Choia ridleyi
- † Choia utahensis
- † Chondrites
- † Chonetes
- † Chonetina
- † Chonetina flemingi
- † Choristites
- † Choristites fritschi – or unidentified comparable form
- † Choristites pavlovi – or unidentified comparable form
- † CladochonusFossil of the Carboniferous tabulate coral Cladochonus
- † Clathrospira – tentative report
- † Clavagnostus
- † Clavagnostus repandus
- † Cleiothyridina
- † Cleiothyridina type locality for species A – informal
- † Cleiothyridina type locality for species B – informal
- † Clelandia
- † Clelandia utahensis
- † Cliothyridina
- † Cliothyridina orbicularis
- † Clonograptus
- † Coelogasteroceras
- † Coenites
- † Colinispongia
- † Colinispongia regularis
- † CompositaFossilized shell of the Late Devonian-Permian brachiopod Composita
- † Composita argentea
- † Composita mira
- † Composita ovata
- † Composita parasulcata
- † Composita plana
- † Composita subtilita
- † Composita trilobata
- † Composita trinuclea
- † Condrathyris
- † Condrathyris perplexa
- † Conotreta
- † Conotreta millardensis
- † Coosella
- † Coosina
- † Cordaianthus
- † Cordaianthus pseudofluitans
- † Cordaicarpus
- † Cordaicarpus binutus – type locality for species
- † Cordaicarpus cordatus
- † Cordaicarpus elongatus
- † Cordaicarpus globosus – type locality for species
- † Cordaicarpus jayshulerii – type locality for species
- † Cordaicarpus manningcanensis – type locality for species
- † CordaitesFossilized foliage of the Carboniferous-Permian conifer relative Cordaites
- † Cordaites angulosostriatus
- † Cordaites principalis
- † Cordaites Sp. A – informal
- † Cordaites Sp. B – informal
- † Cornucarpus
- † Cornucarpus longicaudatus – type locality for species
- † Corynepteris
- † Corynepteris angustissima
- † Costellarina
- † Cotalagnostus
- Crania
- † Crania rowleyi
- † Cravenoceras
- † Crepicephalus
- † Crossopteris – type locality for genus
- † Crossopteris mcknightii – type locality for species
- † Crossopteris undulata – type locality for species
- † Crossopteris utahensis – type locality for species
- † Crurithyris
- † Crurithyris arcuatus – or unidentified comparable form
- † Crurithyris expansa – tentative report
- † Cruziana
- † Ctenalosia
- † Ctenalosia fixata
- † Ctenocystis
- † Ctenocystis utahensis
- † CtenospondylusRestoration of the Permian synapsid (mammal precursor) Ctenospondylus
- † Ctenospondylus casei – or unidentified related form
- † Cyathaxonia
- † Cyathocarpus
- † Cyathocarpus arborescens
- † Cyathocarpus cyatheus
- † Cybeloides
- † Cybelopsis
- † Cybelopsis speciosa
- † CyclopterisFossilized foliage from the Carboniferous seed fern Cyclopteris
- † Cyclopteris dilatata
- † Cymatospira
- † Cymatospira montfortianus
- † Cymbiocrinus
- † Cymbiocrinus anatonus – type locality for species
- † Cymbiocrinus cuneatus – type locality for species
- † Cyperites
- † Cyperites bicarinatus
- † Cyrtia
- † Cyrtina
- † Cyrtorostra
- † Cystodictya
- † Cystodictya astrepta
D
- † Dalmanellida
- † Deiracephalus
- † Delaria
- † Delaria sevilloidia
- † Delocrinus
- † Delocrinus subhemisphericus
- † Deltina – type locality for genus
- † Deltina limba – type locality for species
- Dentalium
- † Derbyia
- † Derbyia bennetti
- † Derbyia crassa
- † Derbyia sulca
- † Derbyia wabashensis
- † Desmoinesia
- † Desmoinesia muricatina
- † Diacanthaspis
- † Diacanthaspis trispineus – type locality for species
- † DiadectesLife restoration of the Permian reptile relative Diadectes
- † Diagoniella
- † Diagoniella cyathiformis
- † Diagoniella hindei
- † Diagoniella magna – type locality for species
- † Diagoniella robisoni – type locality for species
- † Diaphragmus
- † Diaphragmus cestriensis
- † Dicanthopyge
- † Dicanthopyge convergens
- † Dicranocaris
- † Dicranocaris guntherorum
- † Dictyoclostus
- † Dictyoclostus burlingtonensis
- † Dictyoclostus inflatus
- † Dictyonema
- † Dictyonema flabelliforme – or unidentified comparable form
- † DidymograptusFossil of the Middle Ordovician graptolite Didymograptus
- † Didymograptus artus
- † Didymograptus bifidus
- † Didymograptus nitidus – or unidentified comparable form
- † Dielasma
- † Dielasma formosum
- † Dielasma phosphoriense
- † Dielasma spatulatum
- † Dimegelasma
- † Dimeropygiella
- † Dimeropygiella blanda
- † Dimeropygiella caudanodosa – type locality for species
- † Dimeropygiella fillmorensis
- † Dimeropygiella mccormicki
- † Dimeropygiella ovata
- † Dimorphoceras
- † Dimorphoceras rileyi – type locality for species
- † Dimorphoceras worki – type locality for species
- † Dioxycaris
- † Dioxycaris argenta
- † Diparalasma
- † Diparelasma
- † Diparelasma pogonipensis – or unidentified comparable form
- † Diparelasma rowelli
- † Diparelasma transversum – or unidentified comparable form
- † Diphyphyllum
- † Diplagnostus
- † Diplagnostus planicauda
- † Diplorrhina
- † Diplorrhina depressa
- † Diplothmema
- † Diplothmema arnoldi
- † Diplothmema obtusiloba
- † Diplothmema trifoliolata
- † Diplotrypa – tentative report
- † Ditomopyge
- † Dolerorthis – tentative report
- † Dolerorthis flabellites
- † Donaldina
- † Dorypyge
- † Dorypyge swasii
- † Dorypyge wellsvillensis
- † Drepanodus
- † Drepanodus homocurvatus
- † Dresbachia
- † Dresbachia amata
- † Duartea
- † Duartea bruntoni
- † Dunbarinella – tentative report
- † Dunderbergia
- † Dunderbergia anyta
- † Dunderbergia bigranulosa – tentative report
- † Dyoros
- † Dyoros type locality for species A – informal
- † Dysoristus
- † Dytremacephalus
- † Dzhaprakoceras
E
- † Echinalosia
- † Echinalosia type locality for species A – informal
- † Echinaria
- † Echinaria semipunctata – or unidentified related form
- † Echinauris – or unidentified comparable form
- † Echinauris subhorrida
- † Echinoconchus
- † Echinoconchus elegans
- † Echinoconchus semipunctatus
- † Echinocrinus
- † Ectenonotus
- † Ectenonotus progenitor
- † Ectenonotus whittingtoni
- † Ectosteorhachis – or unidentified related formLife restoration of the Permian lobe-finned fish Ectosteorhachis
- † Ectosteorhachis nitidus
- †Edmondia
- † Ehmaniella
- † Ehmaniella quadrans – tentative report
- † Ekvasophyllum
- † Ekvasophyllum inclinatum
- † Elburgia
- † Elburgia granulosa
- † Elburgia intermedia
- † Eldonia
- † Eldonia ludwigi
- † Eleutherocentrus
- † Eleutherocentrus petersoni
- † Elrathella
- † ElrathiaFossils at different stages of development of the Cambrian trilobite Elrathia
- † Elrathia kingi
- † Elrathiella
- † Elrathiella dugwayensa – type locality for species
- † Elrathina
- † Elrathina spencei
- † Elvinia
- † Emeraldella
- † Endelocrinus
- † Endelocrinus matheri
- † Endoceras
- † Entogonites
- † Entogonites acus
- † Entogonites borealis
- † Entogonites burbankensis – type locality for species
- † Eoastarte
- † Eoastarte subcircularis
- † Eofletcheria
- † Eoorthis
- † Eriaster – type locality for genus
- † Eriaster ibexensis – type locality for species
- † Eridopora
- † Eridotrypa
- † Eridotrypa hindsi
- † Eridotrypa subtilis
- † Erixanium
- † Erixanium carinatum
- † EryopsLife restoration of the Carboniferous-Permian amphibian Eryops
- † Euconospira
- † Eukrinaster – type locality for genus
- † Eukrinaster ibexensis – type locality for species
- † Eukteanochiton – type locality for genus
- † Eukteanochiton milleri – type locality for species
- † Euloma – report made of unidentified related form or using admittedly obsolete nomenclature
- † Euloma cordilleri
- † Eumetria
- † Eumetria acuticosta
- † Eumetria costata
- † Euphemites
- † Euphemites carbonarius
- † Euphemitopsis
- † Euphemitopsis subpapillosa – type locality for species
- † Euptychaspis
- † Eurekia
- † Eurytreta
- † Eurytreta bisecta – or unidentified comparable form
- † Eurytreta fillmorensis – type locality for species
F
- † Faberophyllum
- † Falcatamacaris – type locality for genus
- † Falcatamacaris bellua – type locality for species
- †Fenestella
- † Fenestella acarinata
- † Fenestella crockfordae
- † Fenestella dissepinodaria
- † Fenestella hamithensis
- † Fenestella incipiens
- † Fenestella parallela
- † Fenestella rarinodosa
- † Fenestella regalis
- † Fenestella serratula
- † Fenestella tooelensis
- † Fenestella trifurcata
- † Fenestella utahensis
- † Fenestralia
- † Fenestralia sanctiludovici
- † Fenestrellina
- † Fistulipora
- † Forteyops
- † Forteyops sexapugia – type locality for species
- † Fusulinella
G
- † Gattendorfia
- † Genalaticurus
- † Genalaticurus genalatus
- † GenevievellaFossil of the Cambrian trilobite Genevievella
- † Genevievella granulatus
- † Girtyella – tentative report
- † Girtyoceras
- † Girtyoceras gordoni – type locality for species
- † Girtyoceras hamiltonense
- † Girtyoceras primum – type locality for species
- † Girtypecten
- † Girtyspira
- † Girvanella
- † Glabrocingulum
- † Glabrocingulum coronatum
- † Glabrocingulum granulosum – type locality for species
- † Glabrocingulum mephitifontis – type locality for species
- † Glaphyrites
- † Glaphyrites nevadensis
- † Globocrinus
- † Globocrinus bulbus – type locality for species
- † Glochinomorpha – type locality for genus
- † Glochinomorpha stifeli – type locality for species
- † Glosopleura
- † Glossopleura
- † Glossopleura boccar
- † Glossopleura gigantea
- † Glossopleura producta
- † Glossopleura prona
- † Glossopleura punctatum
- † Glyphaspis
- † Glyphaspis concavus – type locality for species
- † Glyptospira
- † Gnathodus
- † Gnathodus texanus
- † Gnetopsis
- † Gnetopsis anglica
- † GogiaFossil of the Cambrian echinoderm Gogia
- † Gogia granulosa
- † Gogia guntheri
- † Gogia kitchnerensis
- † Gogia spiralis
- † Goleocrinus
- † Goleocrinus vadosus – type locality for species
- † Goleocrinus vedosus
- † Goniasma
- † Goniatites
- † Goniatites americanus
- † Goniatites deceptus – type locality for species
- † Goniatites eganensis
- † Goniatites sowerbyi
- † Goniophrys
- † Goniophrys prima
- † Goniotelena
- † Goniotelena ensifer
- † Goniotelina
- † Goniotelina ensifer
- † Goniotelina plicolabeonus – type locality for species
- † Goniotelus – tentative report
- † Goniotelus ludificatus
- † Gonitelina
- † Gothodus
- † Gothodus communis
- † Grammatodon
- † Grammatodon politus
- † Grandaurispina – or unidentified comparable form
- † Grandaurispina type locality for species A – informal
- † Gruntia – tentative report
- † Guizhoupecten – tentative report
- † Guizhoupecten tubicostata – or unidentified comparable form
- † Gujocardita
- † Gujocardita parviradiatus – type locality for species
- † Gunterichthys – type locality for genus
- † Gunterichthys lehiensis – type locality for species
H
- † Haimacystis
- † Haimacystis rozhnovi
- † Hammatocyclus
- † Hammatocyclus brazerensis – type locality for species
- † Hamptonia
- † Hamptonia bowerbanki
- † Hamptonia parva – type locality for species
- † Haplistion
- † Haplistion sphaericum
- † HaplophrentisLife restoration of the Cambrian brachiopod relative Haplophrentis
- † Haplophrentis carinatus
- † Haplophrentis reesei
- † Hardyoides
- † Hazelia
- † Hazelia palmata
- † Heckethornia
- † Heckethornia alticapitis – type locality for species
- † Heckethornia ballionae – type locality for species
- † Heckethornia bowiei – type locality for species
- † Heckethornia hyndeae
- † Heckethornia morrisseyi – type locality for species
- † Heckethornia numani
- † Heckethornia smithi – type locality for species
- † Heintzella
- † Heintzella whitneyi
- † HelicoprionLife restoration of the Permian Chimaera relative Helicoprion
- † Helicospira
- † Hematites
- † Hematites barbarae – type locality for species
- † Hematites burbankensis – type locality for species
- † Hemiptychina
- † Hemiptychina quadricostata
- † Hemirhodon
- † Hemirhodon amplipyge
- † Hemitrypa
- † Hemitrypa reticulata
- † Hesperonomia
- † Hesperonomia dinorthoides
- † Hesperonomia fontinalis
- † Hesperonomia frontinalis
- † Hesperonomiella
- † Hesperonomiella minor
- † Heteralosia
- † Heteropecten
- † Heteropecten vanvleeti – or unidentified comparable form
- † Hillyardina
- † Hillyardina marginauctum
- † Hillyardina semicylindrica – or unidentified comparable form
- † Hindia
- † Hindia sphaeroidalus
- † Hintzecurus
- † Hintzecurus paragenalatus
- † Hintzeia
- † Hintzeia aemula
- † Hintzeia celsaora
- † Hintzeia firmimarginis
- † Hintzespongia – type locality for genus
- † Hintzespongia bilamina – type locality for species
- † Holcospermum
- † Homagnostus
- † Homalophyllites
- † Hormotoma – tentative report
- † Housia
- † Howellella
- † Hudsonospongia – tentative report
- †Huronia
- † Huronia vertebralis
- † Hustedia
- † Hustedia elongata
- † Hustedia mormoni – type locality for species
- † Hyattidina – tentative report
- † Hyolithellus
Fossilized shells of the Cambrian-Permian brachiopod relative Hyolitha
- † Hyolithes comptus
- † Hypagnostus
- † Hypagnostus parvifrons
- Hyperammina
- † Hyperbolochilus
- † Hypselocrinus
- † Hypselocrinus cavus – type locality for species
- † Hypselocrinus defendus – type locality for species
- † Hypselocrinus secundus
- † Hypselocrinus superus – type locality for species
- † Hystriculina
- † Hystriculina fragilis
- † Hystriculina wabashensis
- † Hystricurus
- † Hystricurus contractus
- † Hystricurus oculilunatus
- † Hystricurus robusta
I
- † Ianthinopsis
- † Ibexella
- † Ibexella multidiaphragmata
- † Ibexicurus
- † Ibexicurus parsonsi – type locality for species
- † Iddingsia
- † Idiognathodus
- † Idiomesus
- † Illaenurus
- † IllaenusFossil of the Middle Ordovician trilobite Illaenus
- † Illaenus utahensis
- † Inflatia
- † Inflatia bilobata
- † Iphidella
- † Irvingella
- † Irvingella flohri – tentative report
- † Irvingella major
- † Ischyrotoma
- † Ischyrotoma juabensis
- † Ischyrotoma wahwahensis
- † Isorthis
- † Isoteloides
- † Isoteloides flexus
- † Isoteloides polaris
- † Isoxyes
J
- † Jeffersonia
- † Jenkinsonia
- † Jenkinsonia varga
- † Juresania
- † Juresania nebraskensis
K
- † Kainella
- † Kanoshia
- † Kanoshia depressus – type locality for species
- † Kanoshia kanoshensis
- † Kanoshia reticulata
- † Kanoshopora
- † Kanoshopora droserae
- † Kawina
- † Kawina webbi
- † Kawina wilsoni
- † Kazakhoceras
- † Kazakhoceras bylundi – type locality for species
- † Kindbladia
- † Kindbladia affinis
- † Kingstonia
- † Kirkella
- † Kirkella fillmorensis
- † Kiwetinokia
- † Kiwetinokia utahensis
- † Kochina
- † Kochina vestita
- † Kochiproductus
- † Komia
- † Komiella
- † Komiella ostiolata
- † KooteniaFossil of the Cambrian trilobite Kootenia
- † Kootenia acicularis
- † Kootenia mendosa
- † Kootenia quadriceps
- † Kootenia spencei
- † Kootina
- † Kootina pectenoides
- † Kormagnostella
- † Kormagnostella advena
- † Kormagnostella insolita
- † Kormagnostus
- † Kozlowskia
- † Kozlowskia capaci – or unidentified related form
- † Kutorginella
- † Kutorginella lasallensis
- † Kuvelousia
- † Kuvelousia leptosa
L
- † Lachnostoma
- † Lachnostoma latucelsum – type locality for species
- † Lagenospermum
- † Lagenospermum discissium – type locality for species
- † Lamellispira
- † Lavadamia
- † Lavadamia joplinae – type locality for species
- † Leanchoila
- † Leanchoila protogonia
- † Leanchoila superlata
- † LeanchoiliaLife restoration in multiple views of the Cambrian arthropod Leanchoilia
- † Leanchoilia hanceyi
- † Leanchoilia superlata
- † Lecanospira
- † Leiorhynchoidea
- † Leiorhynchus
- † Leiostegium
- † Leiostegium formosa
- † Leiostegium manitouense – or unidentified comparable form
- † Leiostegium manitouensis
- † Lejopyge
- † Lejopyge calva
- † Leperditia
- † Leperditia bivia
- † Lepidocarpon
- † Lepidocarpon linearifolium
- † LepidodendronLife restoration of the Carboniferous tree-sized club moss relative Lepidodendron
- † Lepidodendron aculeatum
- † Lepidodendron obovatum
- † Lepidodendron volkmannianum
- † Lepidophylloides
- † Lepidophyllum
- † Lepidophyllum longifolium
- † Lepidostrobophyllum
- † Lepidostrobophyllum majus
- † Lepidostrobus
- † Lepidostrobus obovatus
- † Lepidostrobus variabilis
- † Leptaena
- † Leptalosia
- † Leptalosia scintilla – or unidentified comparable form
- † Leptanena
- † Leptomitella
- † Leptomitella metta – type locality for species
- † Leptomitus
- † Lesuerilla – tentative report
- † Licnocephala
- † Licnocephala bicornuta – tentative report
- † Licnocephala cavigladius
- Lima
- † Limapecten
- Limatula
- † Limipecten
- † Linevitus
- † Linevitus billingsi
- Lingula
- † Lingula carbonaria
- † LingulellaIllustration of a fossilized shell of the Cambrian-Late Ordovician brachiopod Lingulella
- † Lingulella incurvata
- † Lingulella pogonipensis – or unidentified comparable form
- † Linipalus
- † Linipalus magnispinus
- † Linnarssonella
- † Linnarssonia
- † Linnarssonia bellatula
- † Linnarssonia ophirensis
- † Linoproductus
- † Linoproductus meniscus
- † Linoproductus ovatus
- † Linoproductus planiventralis – tentative report
- † Linoproductus prattenians
- † Linoproductus prattenianus
- † Lissocoelia
- † Lissocoelia cylindrica
- † Lithostrontionella
- † Lithostrotionella
- † Lithostrotionella americana – or unidentified comparable form
- † Llanoaspis
- † Lobatospongia – type locality for genus
- † Lobatospongia nodensis – type locality for species
- † Lochriea
- † Lochriea commutata
- † Lonchocephalus
- † Lophophyllidium
- † Lophophyllidium profundum
- † Loxonema
- † Loxoplocus
- † Lunulazona
- † Lunulazona costata
- † Lunulazona nodomarginata
- † Lyracystis
- † Lyracystis reesei
M
- † Macluritella
- † Maclurites
- † Macronotella
- † Madaraspis
- † Madaraspis magnifica
- † MargaretiaRestoration of the mysterious Cambrian life-form Margaretia
- † Margaretia dorus
- † Marginifera
- † Marginovatia
- † Marginovatia catinulus
- † Mariopteris
- † Mariopteris muricata
- † Marjumicystis
- † Marjumicystis mettae – type locality for species
- † Marpolia
- † Matherella
- † Matthevia
- † Matthevia variabilis
- † Matthevia wahwahensis – type locality for species
- † Meekopora
- † Meekospira
- † Menomonia
- † Menomonia semele
- † Menoparia
- † Menoparia genalunata
- † Metabowmania
- † Metabowmania braggi – type locality for species
- † Metabowmania morgani
- † MetacocerasFossilized shell of the Carboniferous-Permian nautiloid cephalopod Metacoceras
- † Metadimorphoceras
- † Metadimorphoceras mangeri – type locality for species
- † Metadimorphoceras richardsi
- † Meteoaspis – tentative report
- † Meteoraspis
- † Michelinia
- † Microcardinalia
- † Micromitra
- † Micromitra pannula
- † Millardicurus
- † Millardicurus housensis – type locality for species
- † Millardicurus millardensis
- † Millardicurus paramillardensis – type locality for species
- † Modiolopsis
- Modiolus – report made of unidentified related form or using admittedly obsolete nomenclature
- † Modocia
- † Modocia brevispina
- † Modocia laevinucha
- † Modocia typicalis
- † Modocia weeksensis – type locality for species
- † Mollisonia
- † Mollisonia symmetrica
- † Morania
- † Morania fragmenta
- † Mourlonia
- † Mourlonia venusta – type locality for species
- † Myalina
N
- † Nanorthis
- † Nanorthis hamburgensis
- † Nanorthis multicostata
- † NaraoiaRestoration of the Cambrian-Silurian arthropod Naraoia
- † Naraoia compacta
- † Narynella
- † Narynella sulcata
- † Naticopis
- † Naticopis altonensis – tentative report
- † Naticopsis
- † Natiria
- † Neochonetes
- † Neochonetes granulifer
- † Neolenus
- † Neolenus inflatus – type locality for species
- † Neolenus intermedius – type locality for species
- † Neolenus superbus
- † Neoprioniodus
- † Neoprioniodus scitulus
- † Neoprioniodus varians
- † NeospiriferFossilized shell of the Carboniferous-Permian brachiopod Neospirifer
- † Neospirifer cameratus
- † Neospirifer kansasensis
- † Neospirifer triplicatus
- † Neozaphrentis – tentative report
- † Nephalicephalus – type locality for genus
- † Nephalicephalus beebei – type locality for species
- † Nettapezoura
- † Nettapezoura basilika
- † Neuralethopteris
- † Neuralethopteris pocahontas – or unidentified comparable form
- † NeuropterisFronds of the Carboniferous seed fern Neuropteris
- † Neuropteris ampelina – type locality for species
- † Neuropteris gigantea
- † Neuropteris heterophylla
- † Nieszkowskia – tentative report
- † Niobe – tentative report
- † Nisusia
- † Norwoodia
- † Norwoodia bellaspina
- † Nothorthis
- † Nuculavus
- † Nuculopsis
- † Nuia
- † Nunnacrinus
- † Nunnacrinus olsoni – type locality for species
O
- † Obolus
- † Obolus ella
- † Odontopteris
- † Odontopteris osmundaeformis – or unidentified comparable form
- † Odontopteris subcrenulata – or unidentified comparable form
- † Odontospirifer
- † Odontospirifer type locality for species A – informal
- † Oepikodus
- † Oepikodus quadratus
- † OgygopsisFossil of the Cambrian trilobite Ogygopsis
- † Ogygopsis typicalis
- † Oistodus
- † Oistodus lanceolatus
- † Oistodus linguatus
- † Oistodus longiramis
- † Oistodus multicorrugatus – or unidentified related form
- † Oistodus parallelus
- † Olenellus
- † Olenellus gilberti
- † Olenoides
- † Olenoides expansus
- † Olenoides nevadensis
- † Olenoides serratus
- † Olenoides spencei
- † Olenoides tricephalus
- † OphiacodonLife restoration of the Carboniferous-Permian synapsid (mammal precursor) Ophiacodon
- † Ophiacodon navajovicus
- † Ophileta
- † Opsioryctocephalus
- † Opsioryctocephalus opsis
- † Orbiculoidea
- † Orbiculoidea capuliformis
- † Orbiculoidea missouriensis
- † Orbiculoidea utahensis – type locality for species
- † Orbipora
- † Orbipora utahensis
- † Orthambonites
- † Orthambonites eucharis – or unidentified comparable form
- † Orthambonites michaelis
- † Orthambonites subulata
- † Orthis
- † Orthis subalata – or unidentified comparable form
- † Orthis subulata
- † Orthis swanensis
- † Orthonema
- † Orthonema socorroense – or unidentified comparable form
- † Orthotetes
- † Orthotetes kaskaskiensis
- † Orthriochiton – type locality for genus
- † Orthriochiton utahensis – type locality for species
- † Oryctocare
- † Oryctocare geikei
- † Oryctocephalus
- † Oryctocephalus walcotti
- † Ottenbyella
- † Ottenbyella ibexiana – type locality for species
- † OttoiaLife restoration of the Cambrian priapulid worm relative Ottoia
- † Ottoia prolifica
- † Ovatia
- † Ovatia muralis
- † Owenella
- † Ozarkodina
P
- † Pachycranium
- † Pachycranium faciclunis
- † PagetiaFossil of the Cambrian trilobite Pagetia
- † Pagetia fossula – or unidentified comparable form
- † Paladin
- † Palaeacis
- Palaeoaplysina
- † Palaeoaplysina laminaeformis
- † Palaeobotryllus
- † Palaeoneilo
- † Palaeoneilo parvaradiatus
- † Palaeoscolex
- † Palaeoscolex ratcliffei
- † Paleococrinus
- † Palmerocrinus
- † Palmerocrinus profundus
- † Paltodus
- † Paltodus jeffersonensis
- † Parabellefontia
- † Parabellefontia concinna
- † Parabolinoides
- † Paracosmetocrinus
- † Paracosmetocrinus lundi – type locality for species
- † Parahystricurus
- † Parahystricurus bispicatus
- † Parahystricurus fraudator
- † Parajuresania
- † Parajuresania nebrascensis
- † Parallelodon
- † Parapilekia – tentative report
- † Paraplethopeltis
- † Paraplethopeltis genacurvus
- † Paraplethopeltis genarectus
- † Parkaspis
- † Parkaspis drumensis
- † Peelerophon – tentative report
- † Pelagiella
- † Peniculauris
- † Peniculauris bassi
- † Peniculauris ivesi
- † Penniretepora
- † Pentameroides
- † Pentamerus
- † Pericyclus
- † Permophorus
- † Permophorus albequus
- † Permophorus occidentalis
- † PeronopsisAssemblage of fossils of the Cambrian trilobite Itagnostus interstrictus, until recently known as Peronopsis interstricta
- † Peronopsis acadica
- † Peronopsis amplaxis
- † Peronopsis bonnerensis
- † Peronopsis brighamensis
- † Peronopsis fallax
- † Peronopsis interstricata
- † Peronopsis interstricta
- † Peronopsis montis
- † Peronopsis scutalis
- † Peronopsis segmenta
- † Peronopsis sermenta
- † Perspicaris
- † Perspicaris ellipsopelta
- † Petasmatherus
- † Petasmatherus type locality for species A – informal
- † Petigurus
- † Petigurus inexpectatus
- † Pharkidonotus
- † Pharkidonotus percarinatus
- † Phillipsia
- † Phosphannulus
- † Phrenophoria
- † Phrenophoria type locality for species A – informal
- † Phricodothyris
- † Phyllograptus
- † Pilekia
- † Pilekia trio – tentative report
- Pinna – report made of unidentified related form or using admittedly obsolete nomenclature
- † Plagioglypta
- † Platycrinites
- † Platycrinus
- † Platycrinus graphicus – or unidentified comparable form
- † Platyhystrix – or unidentified comparable formLife restoration of the Carboniferous-Permian sail-backed amphibian Platyhystrix
- † Platyhystrix rugosus
- † Platyworthenia
- † Plectelasma
- † Plectelasma type locality for species A – informal
- † Plectelasma type locality for species B – informal
- † Plethospira
- † Pleurosiphonella
- † Pleurosiphonella virginica
- † Pliomerops
- † Pliomerops insolita
- † Polidevcia
- † Polidevcia bellistriata
- † Polidevcia obesa
- † Politicurus
- † Politicurus politus
- † Polypora
- † Polypora cestriensis
- † Polypora debilis
- † Polypora micronodosa
- † Polypora stansburyensis
- † Ponticulocarpus – type locality for genus
- † Ponticulocarpus robisoni – type locality for species
- † Praedaraelites
- † Praedaraelites loeblichi
- † Prehousia
- † Prehousia alata
- † Prehousia diverta
- † Presbynileus
- † Presbynileus elongatus
- † Presbynileus ibexensis
- † Presbynileus utahensis
- † Probolionia
- † Prodentalium
- † Prodentalium canna
- † Productella
- † Productus – report made of unidentified related form or using admittedly obsolete nomenclature
- † Proehmaniella
- † Proehmaniella basilica
- † Prohedinia
- † Prohedinia spencei
- † Prolecanites – tentative report
- † Prolecanites lyoni
- † Prosaukia
- † Protoblechnum
- † Protoblechnum bradyi – type locality for species
- † Protopliomerella
- † Protopliomerella contracta
- † Protopliomerops
- † Protopliomerops quattuor – type locality for species
- † Protopresbynileus
- † Protopresbynileus willdeni
- † Protoretepora
- † Protospongia
- † Protospongia elongata
- † Prototreta
- † Protowentzelella
- † Protowentzelella cystosa
- † Psalikilus
- † Psalikilus likum
- † Psalikilus paraspinosum
- † Psalikilus spinosum
- † Psalikilus typicum
- † Psephosthenaspis
- † Psephosthenaspis glabrior
- † Psephosthenaspis microspinosa
- † Psephosthenaspis pseudobathyurus
- † Pseudagnostus
- † Pseudoarctolepis
- † Pseudoarctolepis sharpi
- † Pseudoarctolepsis
- † Pseudoarctolepsis sharpi
- † Pseudoclelandia
- † Pseudoclelandia fluxafissura – or unidentified related form
- † Pseudocybele
- † Pseudocybele altinasuta
- † Pseudocybele lemurei
- † Pseudocybele nasuta – type locality for species
- † Pseudodoriodotis
- † Pseudohystricurus
- † Pseudokainella – tentative report
- † Pseudokainella armatus
- † Pseudomera
- † Pseudomera arachnopyge
- † Pseudomera barrandei – or unidentified comparable form
- † Pseudomera insolita
- † Pseudomonotis
- † Pseudomonotis equistriata
- † Pseudomphalotrochus
- † Pseudomphalotrochus incrustatus
- † Pseudoolenoides
- † Pseudoolenoides acicaudus
- † Pseudoolenoides aspinosus
- † Pseudoolenoides dilectus
- † Pseudopermophorus
- † Pseudopermophorus annettae
- † Pseudoperonopsis
- † Pseudorthoceras
- † Pseudosaratogia – tentative report
- † Pseudoschwagerina
- † Pterocephalia
- † Pteronites
- † Ptychagnostus
- † Ptychagnostus aculeatus
- † Ptychagnostus atavusFossil of the Cambrian trilobite Ptychagnostus atavus
- † Ptychagnostus cassis
- † Ptychagnostus germanus
- † Ptychagnostus intermedius
- † Ptychagnostus occultatus
- † Ptychagnostus punctuosus
- † Ptychagnostus richmondensis
- † Ptychagnostus seminula
- † Ptychomphalus
- † Ptychoparella
- † Ptylopora
- † Ptylopora condrai
- † Ptylopora eliasi
- † Ptyocephalus
- † Ptyocephalus accliva
- † Ptyocephalus declevita – type locality for species
- † Ptyocephalus declivita
- † Ptyocephalus versini
- † Ptyocephalus vigilans
- † Pugnax
- † Pugnax utah – type locality for species
- † Pugnoides
- † Punctospirifer
- † Punctospirifer campestris
- † Punctospirifer kentuckensis
- † Punka
- † Punka nitida – or unidentified comparable form
Q
- † Quadratia
- † Quadrisonia – tentative report
- † Quadrisonia lavadamensis
- † Quadrochonetes
- † Quadrochonetes type locality for species A – informal
R
- † Ramiporalia
- † Raphistoma – tentative report
- † Raphistomina
- † Ratcliffespongia – type locality for genus
- † Ratcliffespongia perforata – type locality for species
- † Ratcliffespongia sheeleri
- † Ratcliffespongia wheeleri – type locality for species
- † Rayonnoceras
- † Rayonnoceras solidiorme
- † ReceptaculitesFossil of the Early Ordovician-Permian benthic alga Receptaculites
- † Receptaculites elongatus
- † Receptaculites mammilaris
- † Receptaculites mammillaris
- † Rectifenestella
- † Rectifenestella tenax
- † Regispongia
- † Regispongia contorta
- † Remopleuridiella
- † Remopleuridiella angularis – type locality for species
- † Remopleuridiella caudalimbata
- † Reticulatia
- † Reticulatia americana
- † Retispira
- † Retispira cincta – type locality for species
- † Retispira textilis – or unidentified comparable form
- † Rhabdomeson
- † Rhabdomeson artum
- † Rhipidomella
- † Rhipidomella missouriensis
- † RhodeaShell of a Rhodea land snail
- † Rhodea vespertina
- † Rhombopora
- † Rhombopora tenuirama
- † Rhynchopora
- † Ribeiria
- † Ribeiria lucan
- † Rigbyocarpus – type locality for genus
- † Rigbyocarpus ebracteatus – type locality for species
- † Rodea
- † Rodea vespertina – or unidentified comparable form
- † Rossaspis
- † Rossaspis superciliosa
- † Rossicurus
- † Rossicurus lepidus
- † Rugatia
- † Rugatia occidentalis
- † Rugosochonetes
- † Rugosochonetes loganensis
- † RusophycusFossil of the arthropod burrow ichnogenus Rusophycus
- † Rylstonia – tentative report
S
- † Saffordotaxis
- † Sanguinolites
- † Sanguinolites elongatus – type locality for species
- † Saukia
- † SaukiellaFossil of the Cambrian-Ordovician trilobite Saukiella
- † Scandodus
- † Scandodus furnishi
- † Scaphellina – tentative report
- † Scenella
- † Scenella radians
- † Schizambon
- † Schizambon obtusus – type locality for species
- † Schizodus
- † Schizodus bifidus
- † Schizodus subovatus – type locality for species
- † Schizophoria
- † Schmalenseeia
- † Schuchertella
- † Schuchertella lens
- † Schwagerina
- † Scolicia
- † Scolopodus
- † Scolopodus gracilis
- † Scolopodus pseudoquadratus
- † Scolopodus quadraplicatus
- † Scolopodus rex
- † Seelyia
- † Selenocoryphe – type locality for genus
- † Selenocoryphe platyura – type locality for species
- † SelkirkiaFossil of the Cambrian priapulid worm Selkirkia
- † Selkirkia columbia – or unidentified comparable form
- † Selkirkia spencei
- † Selkirkia willoughby
- † Sentinelia – tentative report
- † Sentinelia draco – or unidentified comparable form
- † Septimyalina
- † Septimyalina burmai – tentative report
- † Septopora
- † Septopora ulrichi
- † Shoshonorthis
- † Shoshonorthis michaelis
- † Shoshonorthis swanensis
- † Shumardia
- † Shumardia exopthalmus
- † SidneyiaRestorative model of the Cambrian arthropod Sidneyia
- † Sigillaria
- † Sigillaria brardii
- † Sinuella – tentative report
- † Siphonobolus – tentative report
- † Spathognathus
- † Spathognathus cristulus
- † Spathognathus scitulus
- † Spencella
- † Spencella utahensa – type locality for species
- † Spencella utahensis
- SphenacodonLife restoration of the Carboniferous-Permian synapsid (mammal precursor) Sphenacodon
- † Sphenacodon ferocior – or unidentified comparable form
- † Sphenophyllostachys – tentative report
- † Sphenophyllum
- † Sphenophyllum angustifolium
- † Sphenophyllum verticillatum
- † Sphenopteridium
- † Sphenopteridium dissectum
- † Sphenopteridium zaitzeffii – type locality for species
- † Sphenopteris
- † Sphenopteris diphlebia – type locality for species
- † Sphenosteges
- † Sphenosteges hispidus
- † Spinilingula
- † Spinilingula prisca – type locality for species
- † Spinofacia – type locality for genus
- † Spinofacia pectinatus – type locality for species
- † SpiriferFossilized shell of the Late Ordovician-Late Triassic brachiopod Spirifer
- † Spirifer centronatus
- † Spirifer opimus
- † Spirifer rockymountanus
- † Spiriferina
- † Spirinella
- † Spirinella pauciplicata
- Spirorbis
- † Squamaria
- † Squamularia – report made of unidentified related form or using admittedly obsolete nomenclature
- † Stenolobulites
- † Stenolobulites simulator
- † Stenolobulites sinuosus
- † Stenopora
- † Stenopora confusionensis
- † Stenoporella
- † Stenoporella mineriensis
- † Stenorhachis – tentative report
- † Stenorhachis genalticurvatus
- † Stibaraster – type locality for genus
- † Stibaraster ratcliffei – type locality for species
- † StigmariaFossil preserved in situ of a Carboniferous tree-like club moss relative with attached Stigmaria rhizome system
- † Stigmaria ficoides
- † Stigmariopsis
- † Stigmariopsis anglica
- † Stolodus – or unidentified related form
- † Stolodus stola
- † Straparollus
- † Streblochondria
- † Strebloplax
- † Strebloplax pertusa
- † Streblopteria
- † Streblopteria montpelierensis
- † Streblotrypa
- † Streblotrypa angulatum
- † Streptelasma
- † Striatifera
- † Striatifera brazeriana
- † Strigambitus
- † Strigambitus utahensis
- † Strobeus – or unidentified related form
- † Sulcoretepora
- † Supaia
- † Supaia rigida
- † Symphysurina
- † Symphysurina cleora – or unidentified comparable form
- † Symphysurina globocapitella
- † Symphysurina illaenoides
- † Symphysurina spicata – or unidentified comparable form
- † Symphysurina uncaspicata
- † Symphysurina walcotti
- † Symphysurus – tentative report
- † Synarmocrinus
- † Synarmocrinus depressus – type locality for species
- † Syntrophina
- † Syntrophina campbelli – or unidentified comparable form
- † Syntrophina carinifera
- † Syntrophopsis
- † Syntrophopsis polita
- † Syntrophopsis transversa
- † SyringoporaFossil of the Devonian tabulate coral Syringopora
- † Syringopora aculeata
- † Syringopora surcularia
- † Syringothyris
- † Syringothyris textus
T
- † Tabulipora
- † Tabulipora atacta
- † Tabulipora carbonaria
- † Tabulipora ricta
- † Tabulipora sarcinula
- † Tabulipora stragula
- † Taeniopteris
- † Talpaspongia
- † Talpaspongia clavata
- † Teichichnus – tentative reportFossil of the feeding trace ichnogenus Teichichnus
- † Telangium
- † Telangium affine
- † Terranovella
- † Tesselacauda
- † Tesselacauda depressa – or unidentified comparable form
- † Testiispongia – type locality for genus
- † Testiispongia venula – type locality for species
- † Testispongia
- † Testispongia venula
- † Tetragraptus
- † Tetragraptus quadribrachiatus – or unidentified comparable form
- † Thalassinoides – tentative reportFossils of the burrow ichnogenus Thalassinoides
- † Thamniscus
- † Thamniscus raribifurcatus
- † Thamnosia – or unidentified comparable form
- † Thamnosia arctica – tentative report
- † Timania
- † Timaniella
- † Timaniella pseudocamerata
- † Tingia
- † Tingia placida – type locality for species
- † Tomagnostella
- † Tomagnostella exsculpta
- † Tonkinella
- † Tonkinella breviceps
- † Tonkinella valida
- † Torynifer
- † Totiglobus – tentative report
- † Totiglobus lloydi
- †Trace
- † Trachycheilus
- † Trachycheilus granulosus
- † Trachycheilus whirlwindensis
- † Trematorthis – tentative report
- † Tricitictes
- † Tricrepicephalus
- † Tricrepicephalus teres
- † Trigonocarpus
- † Trigonocarpus noeggerathii
- † Trigonocerca
- † Trigonocerca typica
- † Trigonocercella
- † Trigonocercella acuta
- † TrinodusIllustration of a fossil of the Cambrian trilobite Trinodus
- † Triplagnostus
- † Triplagnostus gibbus
- † Triplophylites
- † Triplophylites compressus
- † Triplophylites ellipticus
- † Triplophylites subcrassus
- † Triticites
- † Tritoechia
- † Tritoechia loganensis
- † Tritoechia sinuata
- † Trocholites
- † Trochophyllum – tentative report
- † Trymataspis
- † Trymataspis depressa
- † TseajaiaRestoration of the Permian reptile relative Tseajaia
- † Tseajaia campi – type locality for species
- † Tulepyge
- † Tulepyge tulensis – type locality for species
- † Tumicephalus
- † Tumicephalus depressus
- † Tuzoia
- † Tuzoia argenta
- † Tuzoia guntheri
- † Tuzoia retifera
- † Tympanuella
- † Tympanuella transversa
U
- † Ufimia
- † Ulrichodina – tentative report
- † Uromystrum
- † Uromystrum validum – or unidentified comparable form
- † Utagnostus
- † Utagnostus trispinulus
- † Utahacanthus – type locality for genus
- † Utahacanthus guntheri – type locality for species
- † Utahcaris
- † Utahcaris orion
- † Utaherpeton – type locality for genusLife restoration of the Carboniferous amphibian Utaherpeton
- † Utaherpeton franklini – type locality for species
- † Utaspis
- † Utaspis marjumensis
V
- † Valospongia
- † Valospongia gigantis – type locality for species
- † Valospongia gigantus
- † VauxiaFossil of the Cambrian-Silurian sponge Vauxia
- † Vauxia bellula
- † Vauxia gracilenta
- † Vauxia magna – type locality for species
- † Verkhotomia
- † Verkhotomia plenoides – or unidentified comparable form
- † Vesiculophyllum
- † Virgiana
- † Virgiana utahensis – type locality for species
- † Vnigripecten
- † Vnigripecten phosphaticus – or unidentified comparable form
- † Vorticina
- † Vorticina vortex – type locality for species
W
- † Waagenites
- † Waagenites type locality for species A – informal
- † Waagenoconcha
- † Wahwahlingula
- † Wahwahlingula sevierensis – type locality for species
- † Walcottoceras – tentative report
- † Walcottoceras monsense
- † WaptiaRestoration of the Cambrian arthropod Waptia
- † Waptia fieldensis – or unidentified comparable form
- † Warthia – tentative report
- † Weeksina
- † Weeksina unispina
- † Wellerella
- † Wellerella osagensis
- † Wellerella tetrahedra
- † Wewokella
- † Wewokella solida
- † Wilkingia
- † Wimanella
- † WiwaxiaLife restoration of the Cambrian possible mollusc Wiwaxia
- † Wiwaxia corrugata
- † Worthenia
X
- † Xenacanthus – or unidentified related formRestoration of the Late Devonian–Triassic freshwater shark Xenacanthus
- † Xenacanthus texensis
- † Xenostegium
- † Xenostegium acuminferentis – or unidentified comparable form
- † Xenostegium franklinense
- † Xestotrema
- † Xestotrema pulchrum
- † Xystocrania – tentative report
- † Xystocrania perforator
Y
- † Yakia – tentative report
- † Yakovlevia
- † Yakovlevia multistriata
- † Yuknessaspis
- † Yuknessaspis benningtonis – type locality for species
- † Yuknessia
- † Yuknessia simplex
- † Yunnania
Z
- † Zacanthoides
- † Zacanthoides divergens
- † Zacanthoides divergensis
- † Zacanthoides fronslicinus
- † Zacanthoides grabaui
- † Zacanthoides idahoensis
- † Zacanthoides prolixis
- † Zaphrentites
- † Zhanatella
- † Zhanatella utahensis
- † Zittelella
- † Zittelella clarae – or unidentified comparable form
- † Zittelloceras
gollark: Or XMPP/Matrix/osmarks.net multicastchat.
gollark: What if we shut down normal esolangs and FORCE lyricly to use iRC?
gollark: It can't be bigger than Electron.
gollark: Weak. I directly speak Ethernet by flicking switches VERY fast.
gollark: It would be unlyrical, but he *could*.
References
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 7 August 2017.
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