List of the Paleozoic life of Utah

Last updated February 14, 2024

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 538.8 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
Assemblage of fossils of the Cambrian trilobite Agnostus
† 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 ^{[ clarification needed ]}
† 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
Restorative model of the Cambrian arthropod Anomalocaris
† 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
Fossils of the Carboniferous-Permian bryozoan Archimedes
† Archimedes
- † Archimedes macfarlani
- † Archimedes owenanus
† Arcuolimbus
† Arenicolites
† Arroyocrinus
- † Arroyocrinus stokesi – type locality for species
† Arthrophycus – tentative report
† Artisia
† Asaphelina
† Asaphellus – tentative report
Fossil of the Cambrian trilobite Asaphiscus
† 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
Fossilized shell of the Late Ordovician-Carboniferous brachiopod Atrypa
† 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
Fossil of the Cambrian velvet worm relative Aysheaia
† 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
Life restoration of the mysterious Cambrian animal Branchiocaris
† Branchiocaris
- † Branchiocaris pretiosa
† Brassicicephalus
† Breckwithia
- † Breckwithia typa
† Brodioptera
- † Brodioptera stricklani – type locality for species
† Bromella
† Brooksella
† Bucania
† Bythicheilus
- † Bythicheilus typicum

C

† Cactocrinus
- † Cactocrinus arnoldi
Fossilized stems from the Carboniferous-Permian horsetail relative Calamites
† 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
Life restoration of the Cambrian arthropod Canadaspis (left)
† Canadaspis
- † 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
Fossil of the Cambrian trilobite Cedaria
† 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)
- † Chancia ebdome – or unidentified comparable form
† Chanciaopsis – type locality for genus
- † Chanciaopsis heteromorphos – type locality for species
† Chanciopsis
- † Chanciopsis heteromorphos
† Cheilocephalus
† Chilotrypa
Life restoration of the Cambrian sponge Choia
† 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
Fossil of the Carboniferous tabulate coral Cladochonus
† 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
Fossilized shell of the Late Devonian-Permian brachiopod Composita
† 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
Fossilized foliage of the Carboniferous-Permian conifer relative Cordaites
† 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
† Ctenospondylus
- † Ctenospondylus casei – or unidentified related form
† Cyathaxonia
† Cyathocarpus
- † Cyathocarpus arborescens
- † Cyathocarpus cyatheus
† Cybeloides
† Cybelopsis
- † Cybelopsis speciosa
Fossilized foliage from the Carboniferous seed fern Cyclopteris
† 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
Life restoration of the Permian reptile relative Diadectes
† 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
Fossil of the Middle Ordovician graptolite Didymograptus
† 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 ^{[ clarification needed ]}
- † Echinaria semipunctata – or unidentified related form
† Echinauris – or unidentified comparable form
- † Echinauris subhorrida
† Echinoconchus
- † Echinoconchus elegans
- † Echinoconchus semipunctatus
† Echinocrinus
† Ectenonotus
- † Ectenonotus progenitor
- † Ectenonotus whittingtoni
Life restoration of the Permian lobe-finned fish Ectosteorhachis
† Ectosteorhachis – or unidentified related form
- † Ectosteorhachis nitidus
† Edmondia
† Ehmaniella
- † Ehmaniella quadrans – tentative report
† Ekvasophyllum
- † Ekvasophyllum inclinatum
† Elburgia
- † Elburgia granulosa
- † Elburgia intermedia
† Eldonia
- † Eldonia ludwigi
† Eleutherocentrus
- † Eleutherocentrus petersoni
† Elrathella
Fossils at different stages of development of the Cambrian trilobite Elrathia
† 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
Life restoration of the Carboniferous-Permian amphibian Eryops
† 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
Fossil of the Cambrian trilobite Genevievella
† 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
Fossil of the Cambrian echinoderm Gogia
† 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
Life restoration of the Cambrian brachiopod relative Haplophrentis
† 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
Life restoration of the Permian Chimaera relative Helicoprion
† 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 ^{[ clarification needed ]}
- † 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 Hyoliths02.JPG — Fossilized shells of the Cambrian-Permian brachiopod relative *Hyolitha*

† Hyolithes

- † 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
Fossil of the Middle Ordovician trilobite Illaenus
† Illaenus
- † Illaenus utahensis
† Inflatia
- † Inflatia bilobata
† Iphidella
† Irvingella ^{[ clarification needed ]}
- † 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 ^{[ clarification needed ]}
- † Kirkella fillmorensis
† Kiwetinokia
- † Kiwetinokia utahensis
† Kochina
- † Kochina vestita
† Kochiproductus
† Komia ^{[ clarification needed ]}
† Komiella
- † Komiella ostiolata
Fossil of the Cambrian trilobite Kootenia
† 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
Life restoration in multiple views of the Cambrian arthropod Leanchoilia
† 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
Life restoration of the Carboniferous tree-sized club moss relative Lepidodendron
† 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 ^{[ clarification needed ]}
† Limapecten
Limatula
† Limipecten
† Linevitus
- † Linevitus billingsi
Lingula
- † Lingula carbonaria
Illustration of a fossilized shell of the Cambrian-Late Ordovician brachiopod Lingulella
† 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
Restoration of the mysterious Cambrian life-form Margaretia
† 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
Fossilized shell of the Carboniferous-Permian nautiloid cephalopod Metacoceras
† 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
Restoration of the Cambrian-Silurian arthropod Naraoia
† 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
Fossilized shell of the Carboniferous-Permian brachiopod Neospirifer
† 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
Fronds of the Carboniferous seed fern Neuropteris
† Neuropteris
- † Neuropteris ampelina – type locality for species
- † Neuropteris gigantea
- † Neuropteris heterophylla
† Nieszkowskia – tentative report
† Niobe ^{[ clarification needed ]} – tentative report
† Nisusia
† Norwoodia
- † Norwoodia bellaspina
† Nothorthis
† Nuculavus
† Nuculopsis
† Nuia
† Nunnacrinus
- † Nunnacrinus olsoni – type locality for species

O

† Obolus ^{[ clarification needed ]}
- † 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
Fossil of the Cambrian trilobite Ogygopsis
† 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
Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Ophiacodon
† 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
Life restoration of the Cambrian priapulid worm relative Ottoia
† Ottoia
- † Ottoia prolifica
† Ovatia
- † Ovatia muralis
† Owenella
† Ozarkodina

P

† Pachycranium
- † Pachycranium faciclunis
Fossil of the Cambrian trilobite Pagetia
† 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
Assemblage of fossils of the Cambrian trilobite Itagnostus interstrictus , until recently known as Peronopsis interstricta
† Peronopsis
- † 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
Life restoration of the Carboniferous-Permian sail-backed amphibian Platyhystrix
† Platyhystrix – or unidentified comparable form
- † 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
- Fossil of the Cambrian trilobite Ptychagnostus atavus
  † 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 ^{[ clarification needed ]}
- † Pugnax utah – type locality for species
† Pugnoides
† Punctospirifer
- † Punctospirifer campestris
- † Punctospirifer kentuckensis
† Punka ^{[ clarification needed ]}
- † 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
Fossil of the Early Ordovician-Permian benthic alga Receptaculites
† 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
Shell of a Rhodea land snail
† Rhodea
- † 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
Fossil of the arthropod burrow ichnogenus Rusophycus
† Rusophycus
† Rylstonia – tentative report

S

† Saffordotaxis
† Sanguinolites
- † Sanguinolites elongatus – type locality for species
† Saukia
Fossil of the Cambrian-Ordovician trilobite Saukiella
† 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
Fossil of the Cambrian priapulid worm Selkirkia
† 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
Restorative model of the Cambrian arthropod Sidneyia
† Sidneyia
† Sigillaria
- † Sigillaria brardii
† Sinuella – tentative report
† Siphonobolus – tentative report
† Spathognathus
- † Spathognathus cristulus
- † Spathognathus scitulus
† Spencella
- † Spencella utahensa – type locality for species
- † Spencella utahensis
Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Sphenacodon
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
Fossilized shell of the Late Ordovician-Late Triassic brachiopod Spirifer
† 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
Fossil preserved in situ of a Carboniferous tree-like club moss relative with attached Stigmaria rhizome system
† Stigmaria
- † 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
Fossil of the Devonian tabulate coral Syringopora
† Syringopora
- † Syringopora aculeata
- † Syringopora surcularia
† Syringothyris
- † Syringothyris textus

T

† Tabulipora
- † Tabulipora atacta
- † Tabulipora carbonaria
- † Tabulipora ricta
- † Tabulipora sarcinula
- † Tabulipora stragula
† Taeniopteris
† Talpaspongia
- † Talpaspongia clavata
Fossil of the feeding trace ichnogenus Teichichnus
† Teichichnus – tentative report
† 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
Fossils of the burrow ichnogenus Thalassinoides
† Thalassinoides – tentative report
† 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
- † Trace fossil
† Trachycheilus
- † Trachycheilus granulosus
- † Trachycheilus whirlwindensis
† Trematorthis – tentative report
† Tricitictes
† Tricrepicephalus
- † Tricrepicephalus teres
† Trigonocarpus
- † Trigonocarpus noeggerathii
† Trigonocerca
- † Trigonocerca typica
† Trigonocercella
- † Trigonocercella acuta
Illustration of a fossil of the Cambrian trilobite Trinodus
† Trinodus
† Triplagnostus
- † Triplagnostus gibbus
† Triplophylites
- † Triplophylites compressus
- † Triplophylites ellipticus
- † Triplophylites subcrassus
† Triticites
† Tritoechia
- † Tritoechia loganensis
- † Tritoechia sinuata
† Trocholites
† Trochophyllum – tentative report
† Trymataspis
- † Trymataspis depressa
Restoration of the Permian reptile relative Tseajaia
† 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
Life restoration of the Carboniferous amphibian Utaherpeton
† Utaherpeton – type locality for genus
- † Utaherpeton franklini – type locality for species
† Utaspis
- † Utaspis marjumensis

V

† Valospongia
- † Valospongia gigantis – type locality for species
- † Valospongia gigantus
Fossil of the Cambrian-Silurian sponge Vauxia
† 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
Restoration of the Cambrian arthropod Waptia
† Waptia
- † Waptia fieldensis – or unidentified comparable form
† Warthia – tentative report
† Weeksina
- † Weeksina unispina
† Wellerella
- † Wellerella osagensis
- † Wellerella tetrahedra
† Wewokella
- † Wewokella solida
† Wilkingia
† Wimanella
Life restoration of the Cambrian possible mollusc Wiwaxia
† Wiwaxia
- † Wiwaxia corrugata
† Worthenia

X

Restoration of the Late Devonian–Triassic freshwater shark Xenacanthus
† Xenacanthus – or unidentified related form
- † 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

References

Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database" . Retrieved 17 December 2021.

This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.

List of the Paleozoic life of Utah

Contents

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

References