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 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
  • †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
  • †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
  • †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
  • †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
  • †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
    • †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
  • †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
  • †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
  • †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 December 17, 2021.
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