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
  • 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
  • † 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
  • † 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
  • † Arcuolimbus
  • † Arenicolites
  • † Arroyocrinus
    • † Arroyocrinus stokesi – type locality for species
  • † Arthrophycus – tentative report
  • † Artisia
  • † Asaphelina
  • † Asaphellus – tentative report
  • Fossil of the Cambrian trilobite Asaphiscus
    † Asaphiscus
  • † Ascopora
    • † Ascopora macellata
  • † Astartella
    • † Astartella subquadrata
  • † Asterophyllites
    • † Asterophyllites charaeformis
    • † Asterophyllites equisetiformis
    • † Asterophyllites longifolius
  • † Athabaskia
    • † Athabaskia bithus
    • † Athabaskia wasatchensis
  • † Athyridacid
  • † Athyris
  • 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
  • † 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
  • † 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 (genus)
    • † 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
  • † 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
  • Restoration of the Permian synapsid (mammal precursor) Ctenospondylus
    † 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
    • † 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
    • † 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

    • † 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
    • † Irvingella flohri – tentative report
    • † Irvingella major
  • † Ischyrotoma
    • † Ischyrotoma juabensis
    • † Ischyrotoma wahwahensis
  • † Isorthis
  • † Isoteloides
    • † Isoteloides flexus
    • † Isoteloides polaris
  • † Isoxyes

J

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
  • 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
  • † 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
  • † 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
  • † 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
  • † 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
  • 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
  • Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Ophiacodon
    † Ophiacodon
  • † 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
  • † 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
  • † 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
    • † 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
  • 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
  • † 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
  • † 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
  • † 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
  • † 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
  • † 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
  • † 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
  • † 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 7 August 2017.
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