List of the prehistoric life of Utah facts for kids

This list of the prehistoric life of Utah contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Utah.

Precambrian

The Paleobiology Database records no known occurrences of Precambrian fossils in Utah.

Paleozoic

Selected Paleozoic taxa of Utah

• †Acodus
• †Agnostus
• †Amphiscapha
• †Amplexus
• †Annularia
  • †Annularia stellata
• †Anomalocaris
• †Anomphalus
• †Archimedes
  • †Archimedes macfarlani
• †Arcuolimbus
• †Arenicolites
• †Artisia
• 

  Fossil of the Cambrian trilobite Asaphiscus
  †Asaphiscus
  • †Asaphiscus wheeleri
• †Athyris
  • †Athyris lamellosa
• †Atrypa
  • †Atrypa parva – or unidentified comparable form
• †Atrypid
• †Aulopora – tentative report
• †Aviculopecten
  • †Aviculopecten girtyi
  • †Aviculopecten kaibabensis – or unidentified comparable form
• †Aysheaia
• †Bathyuriscus
• †Beckwithia
• †Benthamaspis
• †Beyrichoceras
• †Biscoia
• †Bolbocephalus
• †Bonneterrina
• †Bourbonnella
• †Bowmania
• 

  Life restoration of the mysterious Cambrian animal Branchiocaris
  †Branchiocaris
• †Brassicicephalus
• †Calamites
  • †Calamites cistii – or unidentified comparable form
  • †Calamites suckowii
• †Callipteris – tentative report
• †Callocladia
• †Camarotoechia
• †Campbelloceras – tentative report
• 

  Life restoration of the Cambrian arthropod Canadaspis (left)
  †Canadaspis
  • †Canadaspis perfecta – or unidentified comparable form
• †Canadia
• †Caninia
• †Cardiopteris
• †Carolinites
• †Cavusgnathus
• †Cedaria
• †Chancelloria
• †Chancia
• †Choia
• †Chondrites
• †Chonetes
• †Cladochonus
• †Cleiothyridina
• †Clonograptus
• †Coenites
• 

  Fossilized shell of the Late Devonian-Permian brachiopod Composita
  †Composita
  • †Composita mira
  • †Composita ovata
  • †Composita parasulcata
  • †Composita plana
  • †Composita subtilita
  • †Composita trinuclea
• †Coosella
• †Coosina
• †Cordaicarpus
• †Cordaites
  • †Cordaites principalis
• Crania
• †Cravenoceras
• †Crepicephalus
• †Cruziana
• 

  Restoration of the Permian synapsid (mammal precursor) Ctenospondylus
  †Ctenospondylus
• †Cybelopsis
• †Cyclopteris
• †Cystodictya
• †Deiracephalus
• Dentalium
• †Diadectes
• †Diagoniella
• †Dictyonema
• 

  Fossil of the Middle Ordovician graptolite Didymograptus
  †Didymograptus
  • †Didymograptus nitidus – or unidentified comparable form
• †Dimeropygiella
• †Diplorrhina
• †Donaldina
• †Dresbachia
• †Echinaria
• †Ectosteorhachis – or unidentified related form
• †Ehmaniella
• †Eldonia
• †Eleutherocentrus
• †Elrathia
• †Elrathina
• †Emeraldella
• †Endoceras
• 

  Life restoration of the Carboniferous-Permian amphibian Eryops
  †Eryops
• †Euptychaspis
• †Fenestella
• †Forteyops
• †Genevievella
• †Girvanella
• †Gnathodus
• †Gogia
• †Goniatites
• †Gunterichthys – type locality for genus
• †Hamptonia
• †Haplophrentis
• †Hazelia
• 

  Life restoration of the Permian Chimaera relative Helicoprion
  †Helicoprion
• †Hematites
• †Hemirhodon
• †Hindia
• †Hintzeia
• †Homagnostus
• †Huronia
• †Hyolithellus
• †Hyolithes
• †Idiognathodus
• †Illaenus
• †Irvingella
• †Jeffersonia
• †Kanoshia
• †Kawina
• †Kingstonia
• †Kirkella
• †Komia
• †Kootenia
• †Lachnostoma
• 

  Life restoration in multiple views of the Cambrian arthropod Leanchoilia
  †Leanchoilia
• †Lejopyge
• †Lepidodendron
  • †Lepidodendron aculeatum
  • †Lepidodendron obovatum
• †Lepidophyllum
• †Lepidostrobus
• †Leptomitus
• Lima
• Limatula
• Lingula
• †Lingulella
• †Llanoaspis
• †Lochriea
• †Lonchocephalus
• †Lyracystis
• †Margaretia
  • †Margaretia dorus
• †Marpolia
• †Matthevia
• 

  Fossilized shell of the Carboniferous-Permian nautiloid cephalopod Metacoceras
  †Metacoceras
• †Meteoraspis
• †Micromitra
• Modiolus – report made of unidentified related form or using admittedly obsolete nomenclature
• †Mollisonia
• †Morania
• †Naraoia
• †Naticopsis
• †Neospirifer
  • †Neospirifer cameratus
  • †Neospirifer kansasensis
  • †Neospirifer triplicatus
• †Neuropteris
  • †Neuropteris gigantea
  • †Neuropteris heterophylla
• †Niobe – tentative report
• †Nisusia
• †Norwoodia
• †Obolus
• †Ogygopsis
• †Olenellus
• †Olenoides
  • †Olenoides nevadensis
  • †Olenoides serratus
• 

  Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Ophiacodon
  †Ophiacodon
  • †Ophiacodon navajovicus
• †Orthis
• †Oryctocephalus
• †Ottoia
  • †Ottoia prolifica
• †Ozarkodina
• †Pagetia
• †Paladin
• Palaeoaplysina
• †Palaeoscolex
• †Pelagiella
• †Pentamerus
• †Peronopsis
  • †Peronopsis interstricta
• †Perspicaris
• †Phillipsia
• †Phyllograptus
• Pinna – report made of unidentified related form or using admittedly obsolete nomenclature
• †Platycrinites
• 

  Life restoration of the Carboniferous-Permian sail-backed amphibian Platyhystrix
  †Platyhystrix – or unidentified comparable form
  • †Platyhystrix rugosus
• †Prodentalium
• †Prohedinia
• †Protopliomerella
• †Protospongia
• †Ptychagnostus
  • †Ptychagnostus atavus
• †Pugnax
• †Punka
• †Quadratia
• †Rayonnoceras
• 

  Fossil of the Early Ordovician-Permian benthic alga Receptaculites
  †Receptaculites
• †Ribeiria
• †Rusophycus
• †Saukiella
• †Scenella
• †Schmalenseeia
• †Schwagerina
• †Scolicia
• †Selkirkia
  • †Selkirkia columbia – or unidentified comparable form
• †Sidneyia
• †Sigillaria
  • †Sigillaria brardii
• 

  Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Sphenacodon
  Sphenacodon
• †Sphenophyllum
  • †Sphenophyllum angustifolium
  • †Sphenophyllum verticillatum
• †Sphenopteris
• †Spinofacia – type locality for genus
• †Spirifer
  • †Spirifer centronatus
  • †Spirifer opimus
• †Spiriferina
• Spirorbis
• †Stenorhachis – tentative report
• 

  Fossil preserved in situ of a Carboniferous tree-like club moss relative with attached Stigmaria rhizome system
  †Stigmaria
• †Syringopora
• †Teichichnus – tentative report
• †Terranovella
• †Tetragraptus
• †Thalassinoides – tentative report
• †Tricrepicephalus
• †Trigonocercella
• †Trinodus
• †Triplagnostus
• †Trocholites
• †Tseajaia
  • †Tseajaia campi – type locality for species
• †Tuzoia
• 

  Life restoration of the Carboniferous amphibian Utaherpeton
  †Utaherpeton – type locality for genus
• †Vauxia
• †Walcottoceras – tentative report
• †Waptia
  • †Waptia fieldensis – or unidentified comparable form
• †Weeksina
• †Wilkingia
• †Wiwaxia
  • †Wiwaxia corrugata
• †Worthenia
• †Xenacanthus – or unidentified related form
• †Yuknessia
• †Zacanthoides
• †Zittelloceras

Mesozoic

Selected Mesozoic taxa of Utah

• †Abydosaurus – type locality for genus
  • †Abydosaurus mcintoshi – type locality for species
• †Acristavus
  • †Acristavus gagslarsoni
• †Adelolophus – type locality for genus
  • †Adelolophus hutchisoni – type locality for species
• †Adocus
• †Alamosaurus
  • †Alamosaurus sanjuanensis
• †Albanerpeton
  • †Albanerpeton cifellii – type locality for species
  • †Albanerpeton galaktion
  • †Albanerpeton gracilis
  • †Albanerpeton nexuosus
• †Allocrioceras
• 

  Life restoration of the Late Jurassic theropod dinosaur Allosaurus
  †Allosaurus
  • †Allosaurus fragilis
• †Alphadon
  • †Alphadon attaragos
  • †Alphadon eatoni – type locality for species
  • †Alphadon halleyi
  • †Alphadon marshi – or unidentified comparable form
  • †Alphadon sahnii
• †Amblotherium
• †Ameribaatar – type locality for genus
  • †Ameribaatar zofiae – type locality for species
• 

  A living Amia, or bowfin
  Amia
• †Anaflemingites
• †Anasibirites
  • †Anasibirites angulosus
  • †Anasibirites bastini
  • †Anasibirites hircinus
  • †Anasibirites kingianus
  • †Anasibirites mojsisovicsi
  • †Anasibirites multiformis
  • †Anasibirites tenuistriatus
• †Anchisauripus
• †Anemia
• 

  Mounted fossilized skeleton of the Cretaceous armored dinosaur Animantarx
  †Animantarx – type locality for genus
  • †Animantarx ramaljonesi – type locality for species
• Anomia
• †Anomoepus
• †Apatopus
• †Apatosaurus
  • †Apatosaurus louisae – type locality for species
• †Araeodon
• †Araucarioxylon
• †Arctoceras
• †Arctoprionites
• †Arvinachelys – type locality for genus
• †Aspenites
• Astarte
• Asteriacites
• †Astroconodon
  • †Astroconodon delicatus – type locality for species
• †Atreipus
• 

  Illustration of fossilized teeth from the Late Cretaceous tyrannosaur Aublysodon
  †Aublysodon – tentative report
• †Baena
• †Barosaurus
  • †Barosaurus lentus
• †Basilemys
• †Bernissartia
• †Brachauchenius
  • †Brachauchenius lucasi
• †Brachiosaurus
• †Brachyphyllum
• †Brontomerus – type locality for genus
  • †Brontomerus mcintoshi – type locality for species
• †Brontopodus
• 

  Life restoration of a herd of the Late Jurassic sauropod dinosaur Brontosaurus
  †Brontosaurus
  • †Brontosaurus parvus
• †Bryceomys
  • †Bryceomys fumosus – type locality for species
  • †Bryceomys hadrosus
  • †Bryceomys intermedius – type locality for species
• †Calycoceras
• †Camarasaurus – type locality for genus
  • †Camarasaurus lentus – type locality for species
• Campeloma
• †Camptosaurus
  • †Camptosaurus dispar
• †Carmelopodus – type locality for genus
• †Cassiope
• †Cedaromys
  • †Cedaromys bestia – type locality for species
  • †Cedaromys parvus – type locality for species
• †Cedarosaurus – type locality for genus
  • †Cedarosaurus weiskopfae – type locality for species
• †Cedarpelta – type locality for genus
  • †Cedarpelta bilbeyhallorum – type locality for species
• †Cedrorestes – type locality for genus
  • †Cedrorestes crichtoni – type locality for species
• †Ceratodus
• 

  Restoration of the Late Jurassic ceratosaur Ceratosaurus
  †Ceratosaurus
  • †Ceratosaurus nasicornis
• Cerithiopsis
• †Chamops
• †Chinlea – type locality for genus
• †Chirotherium
  • †Chirotherium rex – or unidentified comparable form
• Chlamys
• †Chondrites
• †Cimexomys
  • †Cimexomys antiquus – or unidentified comparable form
• †Cimolodon
  • †Cimolodon electus
  • †Cimolodon nitidus – or unidentified comparable form
  • †Cimolodon similis
• 

  Life restoration of the face of the Late Cretaceous multituberculate mammal Cimolomys
  †Cimolomys
  • †Cimolomys clarki
  • †Cimolomys milliensis – type locality for species
• Cladophlebis
  • †Cladophlebis constricta
  • †Cladophlebis parva
• †Claraia
• †Coelophysis – tentative report
• †Coelurus
  • †Coelurus fragilis
• †Compsemys
• †Coniophis
• 

  Shell of a Corbula basket clam
  Corbula
• †Cretorectolobus
• †Ctenacodon
• †Cteniogenys
• Cucullaea
• †Cycadeoidea
• Cylichna
• †Dakotamys
  • †Dakotamys malcolmi – type locality for species
• †Dakotasuchus
  • †Dakotasuchus kingi
• †Deinonychus
• †Denazinemys
  • †Denazinemys nodosa
• Dentalium
• 

  Restoration of the Late Cretaceous horned dinosaur Diabloceratops
  †Diabloceratops – type locality for genus
  • †Diabloceratops eatoni – type locality for species
• †Dinehichnus – type locality for genus
• †Dinochelys – type locality for genus
• †Diplodocus
  • †Diplodocus hallorum
  • †Diplodocus longus
• Discinisca – report made of unidentified related form or using admittedly obsolete nomenclature
• †Docodon
• †Dolichorhynchops
  • †Dolichorhynchops tropicensis – type locality for species
• 

  Restoration of the Late Triassic reptile Doswellia
  †Doswellia
• †Dryolestes
• †Dryosaurus
  • †Dryosaurus altus
• †Dystrophaeus – type locality for genus
  • †Dystrophaeus viaemalae – type locality for species
• Elliptio
• †Enchodus
• †Enneabatrachus
• †Entradasuchus – type locality for genus
  • †Entradasuchus spinosus – type locality for species
• †Eocephalites
• †Eodelphis
• 

  Illustration of a reconstructed skull and restorative portrait of the Late Cretaceous primitive duck-billed dinosaur Eolambia
  †Eolambia – type locality for genus
  • †Eolambia caroljonesa – type locality for species
• †Eopolycotylus – type locality for genus
  • †Eopolycotylus rankini – type locality for species
• †Equisetum
• †Eryma
• †Eucalyptus
• †Eunaticina
• †Euomphaloceras
• †Euspira
• †Euthlastus
• †Eutretauranosuchus
• †Exogyra
  • †Exogyra acroumbonata
  • †Exogyra levis
• †Fabrosaurus – tentative report
• 

  Fossilized skeleton of the Early Cretaceous therizinossaur Falcarius
  †Falcarius – type locality for genus
  • †Falcarius utahensis – type locality for species
• Ficus
• †Flemingites
• †Gastonia – type locality for genus
  • †Gastonia burgei – type locality for species
• †Geminiraptor
  • †Geminiraptor suarezarum
• †Germanonautilus – tentative report
• †Gervillaria
• 

  Fossilized shell of the Carboniferous-Eocene bivalve Gervillia
  †Gervillia
• Gleichenia
• †Glirodon – type locality for genus
  • †Glirodon grandis – type locality for species
• Globularia – tentative report
• †Glyptops
• †Gondolella
  • †Gondolella planata
• †Goniobasis – tentative report
• †Goniopholis
• †Grallator
• †Gryphaea
• 

  Mounted fossilized skeleton of the Late Cretaceous duck-billed dinosaur Gryposaurus
  †Gryposaurus
  • †Gryposaurus monumentensis – type locality for species
• †Hagryphus – type locality for genus
  • †Hagryphus giganteus – type locality for species
• †Hamulus – tentative report
• †Hausmania
• †Hedenstroemia
• †Hemicalypterus – type locality for genus
• †Hippodraco – type locality for genus
  • †Hippodraco scutodens – type locality for species
• †Hispanosauropus
• †Homalopoma
• †Hoplitosaurus – or unidentified comparable form
• †Hoplosuchus – type locality for genus
  • †Hoplosuchus kayi – type locality for species
• †Hybodus
• †Iguanacolossus – type locality for genus
  • †Iguanacolossus fortis – type locality for species
• †Iguanodon
  • †Iguanodon ottingeri – type locality for species
• Ilex
  • †Ilex serrata
• 

  Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size
  †Inoceramus
  • †Inoceramus albertensis – or unidentified comparable form
  • †Inoceramus flavus
  • †Inoceramus gilberti
  • †Inoceramus koeneni
  • †Inoceramus pictus
  • †Inoceramus tenuistriatus – tentative report
  • †Inoceramus undabundus
• †Inyoites
  • †Inyoites beaverensis – type locality for species
  • †Inyoites oweni
• †Iridotriton – type locality for genus
• †Ischyrhiza – or unidentified comparable form
• 

  Fossilized shell of the Permian-modern marine bivalve Isognomon
  Isognomon
• †Janumys – type locality for genus
  • †Janumys erebos – type locality for species
  • †Janumys erebros
• †Jugulator
  • †Jugulator amplissimus
• †Kallirhynchia
• †Kamerunoceras
• †Kayentapus
• †Koparion – type locality for genus
  • †Koparion douglassi – type locality for species
• 

  Life restoration of the Late Cretaceous horned dinosaur Kosmoceratops
  †Kosmoceratops – type locality for genus
  • †Kosmoceratops richardsoni – type locality for species
• †Kouphichnium
• †Leidyosuchus
• †Lepidotes
• Lepisosteus
• †Leptalestes
• Lima
• †Lissodus
• †Lonchidion
• Lopha
• Lucina
• 

  Life restoration of the Late Cretaceous tyrannosaur Lythronax
  †Lythronax – type locality for genus
  • †Lythronax argestes – type locality for species
• †Machairoceratops – type locality for genus
  • †Machairoceratops cronusi – type locality for species
• †Macroelongatoolithus
• Magnolia
• †Mammites
• †Marshosaurus – type locality for genus
  • †Marshosaurus bicentesimus – type locality for species
• †Martharaptor – type locality for genus
  • †Martharaptor greenriverensis – type locality for species
• †Meekoceras
  • †Meekoceras davisi
  • †Meekoceras gracilitatis
  • †Meekoceras millardense – type locality for species
  • †Meekoceras olivieri – type locality for species
• †Megalosauripus
• †Megasphaeroceras
• †Melvius
  • †Melvius chauliodous – or unidentified comparable form
• †Meniscoessus
  • †Meniscoessus intermedius
• †Mesodma
  • †Mesodma formosa – or unidentified comparable form
  • †Mesodma hensleighi – or unidentified comparable form
  • †Mesodma minor – or unidentified comparable form
  • †Mesodma thompsoni – or unidentified comparable form
• †Metoicoceras
  • †Metoicoceras geslinianum
• .

  Mounted fossilized skeletons of the Early Cretaceous long-necked dinosaur Moabosaurus
  †Moabosaurus – type locality for genus
• Modiolus
• †Monanthesia
• †Myledaphus
  • †Myledaphus bipartitus
• †Myophorella
  • †Myophorella livinigstonensis
  • †Myophorella monatanaensis
  • †Myophorella yellowstonensis
• †Myophoria
• †Mytilus
• †Naomichelys
• 

  Known material diagram of the Late Cretaceous horned dinosaur Nasutoceratops
  †Nasutoceratops – type locality for genus
  • †Nasutoceratops titusi – type locality for species
• †Naticopsis
  • †Naticopsis depressispira
  • †Naticopsis fenestravella – type locality for species
  • †Naticopsis utahensis – type locality for species
• †Nedcolbertia – type locality for genus
• †Neocardioceras
  • †Neocardioceras juddii
• †Nerinea – tentative report
• Neritina
• †Nezpercius
• †Normannites – tentative report
• 

  Mounted fossilized skeleton of the Late Cretaceous Nothronychus
  †Nothronychus
  • †Nothronychus graffami – type locality for species
• Nucula
• †Odaxosaurus
  • †Odaxosaurus piger – or unidentified comparable form
  • †Odaxosaurus priscus
  • †Odaxosaurus roosevelti – type locality for species
• †Opisthias
• †Ornithomimus
• Ostrea
• 

  Mounted fossilized skeleton of the Late Jurassic herbivorous dinosaur Othnielosaurus
  †Othnielosaurus
  • †Othnielosaurus consors
• †Otozoum
• †Ovaloolithus
  • †Ovaloolithus tenuisus – type locality for species
  • †Ovaloolithus utahensis – type locality for species
• †Owenites
  • †Owenites carpenteri
  • †Owenites koeneni
• †Pagiophyllum
• †Palmulasaurus – type locality for genus
  • †Palmulasaurus quadratus – type locality for species
• †Paracimexomys
  • †Paracimexomys judithae – or unidentified comparable form
  • †Paracimexomys magnus
  • †Paracimexomys perplexus – type locality for species
  • †Paracimexomys priscus – or unidentified comparable form
  • †Paracimexomys robisoni – type locality for species
• †Paramacellodus
• 

  Mounted fossilized skeleton of the Late Cretaceous duck-billed dinosaur Parasaurolophus
  †Parasaurolophus
  • †Parasaurolophus cyrtocristatus
• †Paronychodon – or unidentified comparable form
• †Parotosuchus
• †Peloroplites – type locality for genus
  • †Peloroplites cedrimontanus – type locality for species
• Pholadomya
  • †Pholadomya inaequiplicata
  • †Pholadomya kingi
• †Pinacosuchus – type locality for genus
  • †Pinacosuchus mantiensis – type locality for species
• Pinna
• †Pistia – report made of unidentified related form or using admittedly obsolete nomenclature
• 

  Fossilized shell of the Late Cretaceous ammonoid cephalopod Placenticeras
  †Placenticeras
  • †Placenticeras cumminsi
• †Plagiostoma
• †Planicoxa – type locality for genus
  • †Planicoxa venenica – type locality for species
• †Planolites
• †Pleuronautilus
• Pleurotomaria – tentative report
• Plicatula
• †Poposaurus
  • †Poposaurus gracilis
• †Preprismatoolithus
• †Priacodon
• †Prismatoolithus
  • †Prismatoolithus jenseni – type locality for species
• †Proplacenticeras
• †Protocardia
• †Pseudomelania
• †Pseudotetrasauropus
• †Pteraichnus
  • †Pteraichnus saltwashensis – or unidentified comparable form
  • †Pteraichnus stokesi – or unidentified comparable form
• Pycnodonte
  • †Pycnodonte newberryi
• 

  Fossilized skeleton of the Late Triassic phytosaur Redondasaurus
  †Redondasaurus
  • †Redondasaurus gregorii
• †Rhadinosteus – type locality for genus
  • †Rhadinosteus parvus – type locality for species
• †Rhynchonella – report made of unidentified related form or using admittedly obsolete nomenclature
• †Richardoestesia
  • †Richardoestesia isosceles – or unidentified comparable form
• Rogerella
• Salix
• †Sauropelta – or unidentified comparable form
• †Scapherpeton
• †Schillerosaurus – type locality for genus
• †Scotiophryne
• †Scoyenia
• 

  Known material diagram of the Early Jurassic primitive long-necked dinosaur Seitaad
  †Seitaad – type locality for genus
  • †Seitaad ruessi – type locality for species
• †Semionotus
  • †Semionotus kanabensis – type locality for species
• Serpula
• †Sexta
• †Siats – type locality for genus
  • †Siats meekerorum – type locality for species
• †Skolithos
• Solemya
• †Spheroolithus
• Spirorbis – report made of unidentified related form or using admittedly obsolete nomenclature
• †Squatirhina
  • †Squatirhina americana
• †Stagonolepis
• †Stegopodus – type locality for genus
• 

  Restoration of the Late Jurassic stegosaur Stegosaurus
  †Stegosaurus
  • †Stegosaurus stenops – or unidentified comparable form
  • †Stegosaurus ungulatus
• †Stephanoceras
• †Stokesosaurus – type locality for genus
  • †Stokesosaurus clevelandi – type locality for species
• †Talos – type locality for genus
  • †Talos sampsoni – type locality for species
• †Tanycolagreus
  • †Tanycolagreus topwilsoni
• †Tempskya
  • †Tempskya jonesii – type locality for species
  • †Tempskya knowltoni
  • †Tempskya minor
  • †Tempskya superba
  • †Tempskya whiteheadi – type locality for species
• †Tenontosaurus
• 

  Known material diagram of the Late Cretaceous tyrannosaur Teratophoneus
  †Teratophoneus – type locality for genus
  • †Teratophoneus curriei – type locality for species
• Teredolites
• †Tetrasauropus
• †Thalassinoides
• †Therangospodus – type locality for genus
• †Theretairus
• Thracia
• †Torvosaurus
• †Toxolophosaurus – or unidentified comparable form
• †Trachodon
• 

  Mounted fossilized skeleton of the Late Cretaceous horned dinosaur Triceratops
  †Triceratops
• †Triconolestes – type locality for genus
  • †Triconolestes curvicuspis – type locality for species
• †Trigonia
  • †Trigonia americana
  • †Trigonia elegantissima
  • †Trigonia montanaensis
• †Trinacromerum
  • †Trinacromerum bentonianum – tentative report
• †Trisauropodiscus
• Turritella
• †Tyrannosauripus – type locality for genus
• †Ussurites
  • †Ussurites hosei
• †Utahceratops – type locality for genus
  • †Utahceratops gettyi – type locality for species
• 

  Diagram illustrating the Early Cretaceous dromaeosaurid ("raptor") Utahraptor with an anachronistic human to scale
  †Utahraptor – type locality for genus
  • †Utahraptor ostrommaysi – type locality for species
• †Uteodon
  • †Uteodon aphanoecetes
• Valvata
• †Vancleavea
  • †Vancleavea campi
• †Venenosaurus – type locality for genus
  • †Venenosaurus dicrocei – type locality for species
• †Vex
• Viviparus
• †Worthenia
  • †Worthenia windowblindensis – type locality for species
• †Wyomingites
• †Xenoceltites
  • †Xenoceltites cordilleranus
  • †Xenoceltites subevolutus
• 

  Life restoration of the Early Cretaceous dromaeosaurid ("raptor") Yurgovuchia
  †Yurgovuchia – type locality for genus
  • †Yurgovuchia doellingi – type locality for species
• †Zamites
  • †Zamites powelli
  • †Zamites tidwellii – type locality for species

Cenozoic

Selected Cenozoic taxa of Utah

• Abies
• †Acrocera
• †Agriochoerus
• Alligator
• 

  Fossilized skeleton of the Late Cretaceous-Oligocene Alligator relative Allognathosuchus
  †Allognathosuchus – or unidentified comparable form
• Amia
• Amyda
• †Anosteira
• Anthonomus
• Antilocapra
  • †Antilocapra americana – or unidentified comparable form
• Apalone
• 

  Restoration of an Arctodus, or short-faced bear, with a human to scale
  †Arctodus
  • †Arctodus simus
• †Artemisia
• †Baena
• †Basirepomys
• †Bembidium
• Bison
  • †Bison latifrons – tentative report
• †Bittacus
• †Bootherium
  • †Bootherium bombifrons
• †Boverisuchus
  • †Boverisuchus vorax – type locality for species
• †Brachyhyops
• Brachylagus
  • †Brachylagus idahoensis – or unidentified comparable form
• 

  Life restoration of the Pliocene-Holocene camel Camelops
  †Camelops
  • †Camelops hesternus – or unidentified comparable form
• Camponotus
• Canis
  • †Canis dirus – or unidentified comparable form
  • †Canis latrans – tentative report
  • †Canis lupus
• †Catopsalis
  • †Catopsalis fissidens
• †Champsosaurus
• Chara
• Cheilosia
• †Chipetaia
  • †Chipetaia lamporea – type locality for species
• †Chisternon
• †Chriacus
• †Colodon
• †Compsemys
• †Coniatus
• 

  Life restoration of the Paleocene-Eocene pantodont mammal Coryphodon. Heinrich Harder (1920).
  †Coryphodon
• Crocodylus
  • †Crocodylus acer – type locality for species
  • †Crocodylus affinis
• Culex
• †Cuterebra
• Dicranomyia
• †Dinohippus
• †Diplacodon
• †Diprionomys
• †Duchesnehippus
• †Duchesneodus
• †Echmatemys
• †Ectoconus
• †Elliptio
• 

  Life restoration of a pair of the Eocene uintathere mammal Eobasileus. Charles R. Knight (1890s).
  †Eobasileus
  • †Eobasileus cornutus
• †Eoconodon
• †Eonessa – type locality for genus
  • †Eonessa anaticula – type locality for species
• †Epicaerus
• †Epihippus
• †Epiphanis
• Equus
  • †Equus conversidens – tentative report
• Erethizon
  • †Erethizon dorsatum – tentative report
• †Eucastor
• 

  Fossil of the Eocene bee Euglossopteryx
  †Euglossopteryx – type locality for genus
  • †Euglossopteryx biesmeijeri – type locality for species
• Eutamias
  • †Eutamias minimus
• †Goniacodon
• †Hadrianus
• †Haplolambda – or unidentified comparable form
• †Harpagolestes
• †Helaletes
• †Helodermoides – tentative report
• †Herpetotherium
• †Heteraletes
• †Hoplochelys
• 

  Life restoration of the Eocene-Miocene creodont mammal Hyaenodon
  †Hyaenodon
  • †Hyaenodon vetus – or unidentified comparable form
• Hydrobia – or unidentified comparable form
• †Hylobius
• †Hyopsodus
• †Hypohippus
• †Hypolagus
• †Hyrachyus
• †Hyracodon
• †Hyracotherium
  • †Hyracotherium vasacciense
• †Kimbetohia
• Laccophilus
• †Lambdotherium
• Lemmiscus
  • †Lemmiscus curtatus
• Lepisosteus
• 

  Life restoration of the Eocene-Oligocene even-toed ungulate Leptomeryx
  †Leptomeryx
• †Leptoreodon
• †Leptotragulus
• Lepus
  • †Lepus townsendii – or unidentified comparable form
• †Limnocyon
  • †Limnocyon verus – or unidentified comparable form
• Lynx
  • †Lynx canadensis – or unidentified comparable form
• †Mammut
  • †Mammut americanum
• †Mammuthus
  • †Mammuthus columbi
  • 

    Life restorations of a Mammut americanum, or American mastodon (right), and a Mammuthus primigenius, or wooly mammoth (left)
    †Mammuthus primigenius
• †Megalonyx
  • †Megalonyx jeffersonii
• †Menops
• †Merriamoceros
• †Mesonyx
  • †Mesonyx obtusidens
• †Metaliomys – type locality for genus
• †Metarhinus
• †Metatelmatherium
• 

  Life restoration of the Paleocene-Eocene mammal Miacis
  †Miacis
• †Microsyops
• Microtus
  • †Microtus montanus
• †Miocyon
• Mustela
  • †Mustela richardsonii – tentative report
• †Nemotelus
• Neogale
  • †Neogale vison
• †Neoplagiaulax
  • †Neoplagiaulax macintyrei
• Neotamias
• Neotoma
• †Notharctus
  • †Notharctus tenebrosus – or unidentified comparable form
• Odocoileus
• Ondatra
• †Oodectes – tentative report
• Ophryastes
• †Oxyacodon
• 

  Fossilized skeleton of the Pliocene-Pleistocene ground sloth Paramylodon
  †Paramylodon
  • †Paramylodon harlani – or unidentified comparable form
• †Paramys
• †Parectypodus
• †Paronychomys
• †Peratherium
• Peromyscus
  • †Peromyscus maniculatus
• Phenacomys
  • †Phenacomys intermedius
• Phyllobius
• †Phyllophaga
• Physa
• Picea
• Pinus
• †Plastomenoides
• Plecia
• †Poabromylus
• †Poebrodon
• †Polemonium – or unidentified comparable form
• 

  Life restoration of the Paleocene-Eocene waterfowl Presbyornis
  †Presbyornis – type locality for genus
• †Procaimanoidea – type locality for genus
  • †Procaimanoidea utahensis – type locality for species
• †Procas
• †Procynodictis
• †Prodaphaenus
• †Protitanotherium
• †Protylopus
• †Proviverra
• †Ptilodus
  • †Ptilodus mediaevus
  • †Ptilodus tsosiensis – or unidentified comparable form
• Rhinoclemmys – report made of unidentified related form or using admittedly obsolete nomenclature
• †Saniwa
  • †Saniwa ensidens
• †Sargus
• †Sinopa
• †Smilodectes
  • †Smilodectes gracilis
• 

  Life restoration of the Pleistocene-Holocene saber-tooth cat Smilodon
  †Smilodon
  • †Smilodon fatalis – or unidentified comparable form
• Sorex
  • †Sorex palustris
• Spermophilus
  • †Spermophilus armatus – or unidentified comparable form
• †Sphenocoelus
• †Sthenodectes
• †Stygimys
  • †Stygimys kuszmauli
• †Stylemys
• 

  Life restoration of the Eocene taeniodont mammal Stylinodon
  †Stylinodon
• †Taeniolabis
  • †Taeniolabis taoensis
• †Tapocyon
• Taxidea
  • †Taxidea taxus
• Thomomys
  • †Thomomys talpoides
• †Trogosus
• †Tylocephalonyx
• †Uintacyon
• 

  Life restoration of the Eocene mammal Uintatherium
  †Uintatherium
• †Valenia
• †Viverravus
• Viviparus
• Vulpes
  • †Vulpes vulpes
• Zapus