List of the Mesozoic life of Utah

From Wikipedia, the free encyclopedia

This list of the Mesozoic 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 252.17 and 66 million years of age.

A[]

  • †
    • † – type locality for species
  • †Abydosaurus – type locality for genus
    • †Abydosaurus mcintoshi – type locality for species
  • †
    • †
  • Fossilized skull of the Late Cretaceous duck-billed dinosaur Acristavus
    †Acristavus
    • †Acristavus gagslarsoni
  • †
    • †
  • †Adelolophus – type locality for genus
    • †Adelolophus hutchisoni – type locality for species
  • †
  • †Adocus
  • †
    • † – type locality for species
  • Diagram illustrating the sizes of three specimens of the Late Cretaceous long-necked dinosaur Alamosaurus, with an anachronistic human to scale
    †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
  • †
    • †
  • † – tentative report
  • †Amblotherium
    • †
  • †Ameribaatar – type locality for genus
    • †Ameribaatar zofiae – type locality for species
  • †
    • †
  • Amia
  • †
    • † – type locality for species
  • †
  • †Anaflemingites
    • † – or unidentified related form
  • †Anasibirites
    • †Anasibirites angulosus
    • †Anasibirites bastini
    • †Anasibirites hircinus
    • †Anasibirites kingianus
    • †Anasibirites mojsisovicsi
    • †Anasibirites multiformis
    • †Anasibirites tenuistriatus
  • †
  • †Anchisauripus
    • †
  • † – type locality for genus
    • † – type locality for species
    • † – type locality for species
  • †
  • †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
  • † – report made of unidentified related form or using admittedly obsolete nomenclature
    • † – or unidentified related form
  • † – tentative report
    • † – type locality for species
  • †Araeodon
    • †
  • †
    • †
    • †
  • Petrified trunk segments of the Permian-Late Triassic conifer tree Araucarioxylon arizonicum
    †Araucarioxylon
  • †
  • †Arctoceras
    • †
  • †Arctoprionites
    • †
  • †Arvinachelys – type locality for genus
    • † – type locality for species
  • †Aspenites
    • †
  • Astarte
    • †
    • †
  • Fossil of the Ordovician-Modern sea star trace fossil ichnogenus Asteriacites
    Asteriacites
    • †
  • †
    • †
  • †Astroconodon
    • †Astroconodon delicatus – type locality for species
  • †Atreipus
    • †
  • †Aublysodon – tentative report
  • †
  • †
    • †
    • †
  • † – type locality for genus
    • † – type locality for species

B[]

  • †Baena
  • † – or unidentified comparable form
  • †
    • † – type locality for species
  • †
    • †
    • † – or unidentified comparable form
    • †
    • † – type locality for species
  • Life reconstruction of an individual rearing up to defend itself against a pair of Allosaurus
    †Barosaurus
    • †Barosaurus lentus
  • †Basilemys
  • †
  • †
    • † – type locality for species
  • †Bernissartia
  • †Bicuspidon – type locality for genus
    • † – type locality for species
    • † – type locality for species
  • †
  • † – type locality for genus
    • † – type locality for species
  • Life restoration of the Late Cretaceous plesiosaur Brachauchenius hunting a hesperornithiform bird
    †Brachauchenius
    • †Brachauchenius lucasi
  • †Brachiosaurus
  • †Brachychirotherium
    • †
  • †Brachyphyllum
    • †
  • †Brasilichnium
  • †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
  • †
    • † – type locality for species
  • †Bryceomys
    • †Bryceomys fumosus – type locality for species
    • †Bryceomys hadrosus
    • †Bryceomys intermedius – type locality for species

C[]

  • †
    • †
    • †
    • † – or unidentified related form
  • †Calycoceras
    • †
  • Life restoration of a herd of the Late Jurassic sauropod dinosaur Camarasaurus
    †Camarasaurus – type locality for genus
    • †Camarasaurus lentus – type locality for species
  • Campeloma
  • †
    • †
    • †
  • †Camptosaurus
    • †Camptosaurus dispar
  • †Cantioscyllium – or unidentified comparable form
  • †Carmelopodus – type locality for genus
    • † – type locality for species
  • †
    • †
  • †Cassiope
    • †
  • †Cedaromys
    • †Cedaromys bestia – type locality for species
    • † – or unidentified comparable form
    • † – 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
    • †
  • †
  • †
    • † – type locality for species
    • † – type locality for species
  • Restoration of the Late Triassic coelacanth fish Chinlea
    †Chinlea – type locality for genus
    • † – type locality for species
  • †Chirotherium
    • †Chirotherium rex – or unidentified comparable form
  • Chlamys
  • †Chondrites
  • †
    • †
  • †Cimexomys
    • †Cimexomys antiquus – or unidentified comparable form
    • † – type locality for species
  • †Cimolodon
    • †Cimolodon electus
    • †Cimolodon nitidus – or unidentified comparable form
    • †Cimolodon similis
    • † – type locality for species
  • Life restoration of the face of the Late Cretaceous multituberculate mammal Cimolomys
    †Cimolomys
    • †Cimolomys clarki
    • †Cimolomys milliensis – type locality for species
  • † – type locality for genus
    • † – type locality for species
  • Cladophlebis
    • †Cladophlebis constricta
    • †Cladophlebis parva
  • †Claraia
  • † – type locality for genus
    • † – type locality for species
  • †Coelophysis – tentative report
  • †
    • † – or unidentified comparable form
    • † – type locality for species
    • † – type locality for species
  • Life restoration of the Late Jurassic primmitive tyrannosaur Coelurus
    †Coelurus
    • †Coelurus fragilis
  • †Compsemys
  • †
    • †
  • †Coniophis
  • †Coniopteris
    • †
  • †
    • † – or unidentified comparable form
  • Corbula
  • †
    • †
  • †
    • † – type locality for species
    • †
    • †
    • †
  • †
  • † – type locality for genus
    • † – type locality for species
  • †Cretorectolobus
  • †
  • †Ctenacodon
  • †Cteniogenys
  • †
    • † – or unidentified comparable form
  • Cucullaea
    • †
  • † �� type locality for genus
    • † – type locality for species
  • Fossil of the Jurassic-Cretaceous cycad relative Cycadeoidea
    †Cycadeoidea
    • †
    • †
  • Cylichna
  • †
    • † – type locality for species
  • †
  • †
    • †
  • † – type locality for genus
    • † – type locality for species
  • †
    • † – type locality for species

D[]

  • † – type locality for genus
    • † – type locality for species
    • † – type locality for species
  • †Dakotamys
    • †Dakotamys malcolmi – type locality for species
  • † – type locality for genus
    • † – type locality for species
  • †Dakotasuchus
    • †Dakotasuchus kingi
  • †Deinonychus
  • †Denazinemys
    • †Denazinemys nodosa
  • Dentalium
    • † – or unidentified related form
  • Restoration of the Late Cretaceous horned dinosaur Diabloceratops
    †Diabloceratops – type locality for genus
    • †Diabloceratops eatoni – type locality for species
  • † – type locality for genus
    • †
    • † – type locality for species
    • † – type locality for species
  • †
    • †
  • † – type locality for genus
    • † – type locality for species
  • †Dinehichnus – type locality for genus
    • † – type locality for species
  • †Dinochelys – type locality for genus
    • † – type locality for species
  • †Dinophyton
    • †
  • † – type locality for genus
    • †
    • † – type locality for species
    • †
    • †
  • † – tentative report
  • Life restoration of the Late Jurassic long-necked dinosaur Diplodocus
    †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
  • †Doswellia
  • †
    • †
  • †Dryolestes
    • †Dryolestes priscus
  • †Dryosaurus
    • †Dryosaurus altus
  • †Dystrophaeus – type locality for genus
    • †Dystrophaeus viaemalae – type locality for species

E[]

  • †
  • Elliptio
  • Restoration of the Early Cretaceous-Eocene bony fish Enchodus, or the "saber-toothed herring"
    †Enchodus
  • †Enneabatrachus
  • †Entalophora
    • †
  • †
  • †
  • †Entradasuchus – type locality for genus
    • †Entradasuchus spinosus – type locality for species
  • †
    • † – type locality for species
    • † – type locality for species
    • † – 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
  • †Equisetites
  • †Equisetum
    • †
    • † – informal
  • †Eryma
    • †
  • †Eucalyptus
    • †
  • †
    • † – or unidentified comparable form
    • † – type locality for species
    • †
    • †
    • †
    • † – type locality for species
  • †Eunaticina
    • †
  • †Euomphaloceras
  • †Euspira
    • †
  • †Euthlastus
    • †Euthlastus cordiformis
  • †Eutretauranosuchus
  • †
  • †
    • †
  • Fossilized shell of the Jurassic-Cretaceous foam oyster Exogyra
    †Exogyra
    • †Exogyra acroumbonata
    • †Exogyra levis
  • † – or unidentified comparable form

F[]

  • †Fabrosaurus – tentative report
  • Fossilized skeleton of the Early Cretaceous therizinossaur Falcarius
    †Falcarius – type locality for genus
    • †Falcarius utahensis – type locality for species
  • Ficus
    • †
  • †Flemingites
  • †
    • †
    • †

G[]

  • Mounted fossilized skeletons of the Early Cretaceous armored dinosaur Gastonia
    †Gastonia – type locality for genus
    • †Gastonia burgei – type locality for species
  • †
  • †Geminiraptor
    • †Geminiraptor suarezarum
  • †Germanonautilus – tentative report
  • †Gervillaria
    • †
  • †Gervillia
  • Gleichenia
    • †
    • †
  • †Glirodon – type locality for genus
    • †Glirodon grandis – type locality for species
  • Globularia – tentative report
  • †Glyptops
    • † – type locality for species
  • †Gondolella
    • †Gondolella planata
  • †Goniobasis – tentative report
    • †
  • †
    • †
  • †
    • †
  • Restoration of the Late Jurassic-Early Cretaceous crocodile relative Goniopholis
    †Goniopholis
  • †Grallator
    • †Grallator cursorius
  • †
    • †
  • †Gryphaea
    • †
  • †
  • Mounted fossilized skeleton of the Late Cretaceous duck-billed dinosaur Gryposaurus
    †Gryposaurus
    • †Gryposaurus monumentensis – type locality for species
  • †
    • †
  • †Gwyneddichnium
  • †Gypsonictops

H[]

  • Life restoration of the Late Cretaceous oviraptorosaur Hagryphus
    †Hagryphus – type locality for genus
    • †Hagryphus giganteus – type locality for species
  • †Hamulus – tentative report
    • †
  • †
  • † – type locality for genus
    • † – type locality for species
  • †Hausmania
    • †
  • †Hedenstroemia
    • †
    • †
  • †Hemicalypterus – type locality for genus
    • † – type locality for species
  • † – tentative report
    • † – or unidentified comparable form
  • †
    • †
  • Life restoration of the Early Cretaceous Iguanodon relative Hippodraco
    †Hippodraco – type locality for genus
    • †Hippodraco scutodens – type locality for species
  • †Hispanosauropus
  • †
  • †
    • † – tentative report
    • †
  • †Homalopoma
    • † – type locality for species
  • †
  • †Hoplitosaurus – or unidentified comparable form
  • †Hoplosuchus – type locality for genus
    • †Hoplosuchus kayi – type locality for species
  • Restoration of two of the Permian-Late Cretaceous cartilaginous fish Hybodus
    †Hybodus
  • †
    • † – type locality for species

I[]

  • †
    • † – type locality for species
  • †
    • †
  • Life restoration of the Early Cretaceous Iguanodon relative Iguanacolossus
    †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
    • † – type locality for species
  • †Ischyrhiza – or unidentified comparable form
    • †
  • Fossilized shell of the Permian-modern marine bivalve Isognomon
    Isognomon
    • † – or unidentified comparable form
  • † – type locality for genus
    • † – type locality for species

J[]

  • †Janumys – type locality for genus
    • †Janumys erebos – type locality for species
    • †Janumys erebros
  • †
    • †
  • †Jugulator
    • †Jugulator amplissimus
  • †
    • † – or unidentified related form
    • † – or unidentified comparable form

K[]

  • Fossilized shells of the Jurassic brachiopod Kallirhynchia
    †Kallirhynchia
    • † – type locality for species
  • †Kamerunoceras
  • †
    • †
    • †
    • †
    • †
    • †
    • † – type locality for species
    • †
    • † – type locality for species
  • †Kayentapus
  • † – type locality for genus
    • † – type locality for species
  • †Koparion – type locality for genus
    • †Koparion douglassi – type locality for species
  • †
    • † – or unidentified comparable form
  • Life restoration of the Late Cretaceous horned dinosaur Kosmoceratops
    †Kosmoceratops – type locality for genus
    • †Kosmoceratops richardsoni – type locality for species
  • †Kouphichnium

L[]

  • †
    • †
  • †
    • †
    • †
  • † – type locality for genus
    • † – type locality for species
  • †
    • †
  • † – tentative report
  • †
  • Fossilized skull of the Late Cretaceous alligator relative Leidyosuchus
    †Leidyosuchus
  • † – type locality for genus
    • † – type locality for species
  • †Lepidotes
    • † – type locality for species
  • Lepisosteus
  • †Leptalestes
  • †
    • †
  • †
    • †
    • † – type locality for species
    • † – type locality for species
    • †
  • Lima
  • †
    • †
  • †
    • †
  • †Liostrea
    • †
  • †
    • † – informal
  • †Lissodus
  • †
    • †
  • †Lonchidion
  • Lopha
    • † – or unidentified related form
  • Lucina
  • †
    • †
    • †
  • Life restoration of the Late Cretaceous tyrannosaur Lythronax
    †Lythronax – type locality for genus
    • †Lythronax argestes – type locality for species

M[]

  • Life restoration of the Late Cretaceous horned dinosaur Machairoceratops
    †Machairoceratops – type locality for genus
    • †Machairoceratops cronusi – type locality for species
  • †Macroelongatoolithus
    • †Macroelongatoolithus carlylei – type locality for species
  • † – tentative report
  • †
    • †
    • †
    • †
  • Magnolia
    • †
  • †Mammites
    • †
  • Life restoration of the Late Jurassic megalosaur Marshosaurus
    †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
    • † – or unidentified comparable form
  • †Melvius
    • †Melvius chauliodous – or unidentified comparable form
  • Fossilized skull of the Late Cretaceous multituberculate mammal Meniscoessus
    †Meniscoessus
    • †Meniscoessus intermedius
  • †
    • † – or unidentified comparable form
    • † – type locality for species
  • †
    • †
    • †
  • †
  • †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
  • †Mesostoma
  • †Metoicoceras
    • †Metoicoceras geslinianum
  • †
  • †
    • †
  • †
    • †
    • † – type locality for species
  • † – type locality for genus
    • † – type locality for species
  • †
    • †
  • Mounted fossilized skeletons of the Early Cretaceous long-necked dinosaur Moabosaurus
    †Moabosaurus – type locality for genus
    • † – type locality for species
  • Modiolus
    • †
    • †
  • †Monanthesia
  • † – type locality for genus
    • † – type locality for species
  • †Moros – type locality for genus[1]
  • †
  • †Myledaphus
    • †Myledaphus bipartitus
  • †
    • † – or unidentified comparable form
  • †
    • †
  • Fossilized shell of the Jurassic-Cretaceous marine bivalve Myophorella
    †Myophorella
    • †Myophorella livinigstonensis
    • †Myophorella monatanaensis
    • †Myophorella yellowstonensis
  • †Myophoria
  • †
    • † – or unidentified related form
  • †Mytilus
    • † – or unidentified comparable form

N[]

  • †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
  • †
    • † – type locality for species
    • † – or unidentified comparable form
  • †Nedcolbertia – type locality for genus
    • † – type locality for species
  • †
  • †Neocardioceras
    • †Neocardioceras juddii
  • †
  • †
    • †
    • † – or unidentified comparable form
    • †
    • † – type locality for species
  • † – tentative report
  • Fossilized shell of the Jurassic-Cretaceous sea snail Nerinea
    †Nerinea – tentative report
  • †
    • † – type locality for species
  • Neritina
    • †
  • †Neurankylus
  • †Nezpercius
    • †
  • †
    • † – type locality for species
  • †Nilssoniopteris
  • † – tentative report
  • †Normannites – tentative report
    • † – or unidentified related form
  • Mounted fossilized skeleton of the Late Cretaceous Nothronychus
    †Nothronychus
    • †Nothronychus graffami – type locality for species
  • Nucula
  • Nuculana
    • † – or unidentified comparable form
  • †
    • † – or unidentified related form

O[]

  • † – type locality for genus
    • †
  • †Odaxosaurus
    • †Odaxosaurus piger – or unidentified comparable form
    • †Odaxosaurus priscus
    • †Odaxosaurus roosevelti – type locality for species
  • †
    • † – type locality for species
  • †
    • † – type locality for species
  • – tentative report
  • † – tentative report
  • †
    • † – 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

P[]

  • †
    • † – type locality for species
  • Fossilized foliage of the Carboniferous-Late Cretaceous plant Pagiophyllum
    †Pagiophyllum
  • † – type locality for genus
    • † – type locality for species
  • † – or unidentified comparable form
  • †
    • †
    • †
  • †
    • † – type locality for species
  • †
    • †
  • †Palmulasaurus – type locality for genus
    • †Palmulasaurus quadratus – type locality for species
  • †
    • †
    • † – or unidentified comparable form
  • †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
  • † – type locality for genus
    • † – type locality for species
    • † – type locality for species
  • † – tentative report
    • † – or unidentified related form
  • †Paramacellodus
    • † – or unidentified comparable form
  • †
  • †
    • †
  • †
    • † – type locality for species
    • † – or unidentified comparable form
  • Life restoration of the Late Cretaceous duck-billed dinosaur Parasaurolophus being preyed upon by the tyrannosaur Teratophoneus
    †Parasaurolophus
    • †Parasaurolophus cyrtocristatus
  • †
    • † – type locality for species
    • † – type locality for species
  • †
  • †Paronychodon – or unidentified comparable form
  • †Parotosuchus
    • † – informal
  • †
    • †
  • †
    • †
  • †
  • † – report made of unidentified related form or using admittedly obsolete nomenclature
  • †
    • †
  • †
  • †Peloroplites – type locality for genus
    • †Peloroplites cedrimontanus – type locality for species
  • † – type locality for genus
    • † – type locality for species
  • †
  • †
    • †
  • †
  • †
    • † – or unidentified comparable form
    • †
  • †
  • †
    • † – or unidentified comparable form
  • †Phlebopteris
  • Fossilized shell of the Early Triassic-Pliocene marine bivalve Pholadomya
    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
  • †
  • †
  • †
    • † – or unidentified comparable form
    • † – type locality for species
    • †
  • †Pleuronautilus
  • †
  • Pleurotomaria – tentative report
  • Plicatula
    • † – or unidentified comparable form
  • †Podozamites
  • † – tentative report
  • †Polyglyphanodon – type locality for genus
    • † – type locality for species
  • †
  • Restoration of the Late Triassic crocodile relative Poposaurus with an anachronistic human to scale
    †Poposaurus
    • †Poposaurus gracilis
  • †
    • †
  • †Preprismatoolithus
    • †
  • †Priacodon
  • † – type locality for genus
    • † – type locality for species
  • †Prismatoolithus
    • †Prismatoolithus jenseni – type locality for species
  • † – tentative report
  • †
    • † – type locality for species
  • †
    • †
    • †
  • †
  • †
    • † – or unidentified comparable form
    • †
  • †Proplacenticeras
    • †
  • †
    • †
  • †Protalphadon
  • †Protocardia
  • †
    • †
  • †
    • † – or unidentified related form
  • †
  • † – tentative report
  • †
  • †
  • †
  • †
  • Fossilized shell of a Pseudomelania sea snail
    †Pseudomelania
  • † – tentative report
  • †
  • †
    • †
  • †Pseudosaurillus – or unidentified comparable form
  • †Pseudotetrasauropus
  • †
    • † – type locality for species
  • †
    • † – or unidentified related form
    • † – or unidentified related form
  • †Pteraichnus
    • †Pteraichnus saltwashensis – or unidentified comparable form
    • †Pteraichnus stokesi – or unidentified comparable form
  • †
  • Assemblage of fossilized shells of the Cretaceous-Pleistocene oyster Pycnodonte
    Pycnodonte
    • †Pycnodonte newberryi

Q[]

  • †
    • † – or unidentified related form

R[]

  • †
    • † – or unidentified related form
  • 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
  • †Rhynchosauroides
    • †
  • †
    • †
  • Micrograph with magnified inset of a fossilized tooth of the Late Cretaceous theropod dinosaur Richardoestesia
    †Richardoestesia
    • †Richardoestesia isosceles – or unidentified comparable form
  • Rogerella
  • †
    • † – type locality for species

S[]

  • †Sabalites
    • † – informal
  • Salix
    • †
  • Life restoration of the Early Cretaceous armored dinosaurs Sauropelta
    †Sauropelta – or unidentified comparable form
  • †Scapherpeton
  • †Schillerosaurus – type locality for genus
    • † – type locality for species
  • †
    • †
  • †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
  • † – type locality for genus
    • † – type locality for species
  • †Semionotus
    • †Semionotus kanabensis – type locality for species
  • Serpula
    • †
    • †
  • †Sexta
    • † – or unidentified related form
  • Life restoration of the Late Cretaceous theropod dinosaur Siats
    †Siats – type locality for genus
    • †Siats meekerorum – type locality for species
  • †
  • †
    • †
  • † – type locality for genus
    • † – type locality for species
  • †Skolithos
  • †
    • †
  • Solemya
    • †
  • †
  • †
    • †
    • † – type locality for species
  • † – type locality for genus
    • † – type locality for species
    • †
  • Fossils of the dinosaur egg oogenus Spheroolithus
    †Spheroolithus
  • † – type locality for genus
    • †
    • † – type locality for species
  • Spirorbis – report made of unidentified related form or using admittedly obsolete nomenclature
    • † – or unidentified comparable form
  • †Spongioolithus – type locality for genus
    • † – type locality for species
  • †Squatirhina
    • †Squatirhina americana
  • †Stagonolepis
  • †Stegopodus – type locality for genus
    • † – type locality for species
  • Restoration of the Late Jurassic stegosaur Stegosaurus
    †Stegosaurus
    • †Stegosaurus stenops – or unidentified comparable form
    • †Stegosaurus ungulatus
  • †
    • †
  • †
    • † – or unidentified related form
    • †
  • †Stephanoceras
    • † – or unidentified related form
  • Life restoration of the primitive tyrannosaur Stokesosaurus
    †Stokesosaurus – type locality for genus
    • †Stokesosaurus clevelandi – type locality for species
  • Stomatopora
  • †
  • †
    • †
  • †
    • †
  • † – tentative report
    • †
  • †
    • † – type locality for species
    • † – type locality for species
  • †
  • †
    • †

T[]

  • Known material diagram of the Late Cretaceous troodontid Talos
    †Talos – type locality for genus
    • †Talos sampsoni – type locality for species
  • † – tentative report
  • †Tanycolagreus
    • †Tanycolagreus topwilsoni
  • † – tentative report
  • †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
    • †
  • †Tethyaster
    • † – type locality for species
  • †Tetrasauropus
  • †Thalassinoides
  • † – tentative report
  • †Therangospodus – type locality for genus
    • † – type locality for species
  • †Theretairus
  • †
    • †
  • Thracia
    • †
  • †Tirolites
    • † – tentative report
    • † – or unidentified related form
  • Mounted fossilized skeleton of the Late Jurassic megalosaur Torvosaurus
    †Torvosaurus
  • †Toxolophosaurus – or unidentified comparable form
  • †Trachodon
  • †Torosaurus
    • †Torosaurus utahensis
  • †Triconolestes – type locality for genus
    • †Triconolestes curvicuspis – type locality for species
  • †Trigonia
    • †Trigonia americana
    • †Trigonia elegantissima
    • †Trigonia montanaensis
  • †
    • † – or unidentified comparable form
    • † – or unidentified comparable form
    • † – or unidentified comparable form
  • Fossilized skeleton of the Late Cretaceous polycotylid plesiosaur Trinacromerum
    †Trinacromerum
    • †Trinacromerum bentonianum – tentative report
  • † – type locality for genus
    • † – type locality for species
  • †Trisauropodiscus
    • † – type locality for species
  • Trochocyathus
  • †
    • † – type locality for species
  • †
    • †
  • † – type locality for genus
    • † – type locality for species
    • † – type locality for species
    • † – or unidentified comparable form
  • Turritella
    • †
  • † – tentative report
  • Fossil of the Late Cretaceous tyrannosaur footprint ichnogenus Tyrannosauripus
    †Tyrannosauripus – type locality for genus
    • † – type locality for species

U[]

  • †
  • †
  • †
    • † – or unidentified comparable form
    • †
  • †Ussurites
    • †Ussurites hosei
  • †Utahceratops – type locality for genus
    • †Utahceratops gettyi – type locality for species
  • † – type locality for genus
    • † – type locality for species
    • † – 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

V[]

  • Valvata
  • Life restoration of the Late Triassic reptile Vancleavea
    †Vancleavea
    • †Vancleavea campi
  • † – type locality for genus
    • † – type locality for species
    • † – type locality for species
  • †
    • †
    • †
  • †Venenosaurus – type locality for genus
    • †Venenosaurus dicrocei – type locality for species
  • †
    • † – type locality for species
  • †
  • Shell of a Viviparus freshwater snail
    Viviparus

W[]

  • †
    • † – or unidentified comparable form
  • †
    • †
  • † – type locality for genus
    • † – type locality for species
  • †Worthenia
    • †Worthenia windowblindensis – type locality for species
  • †
    • † – or unidentified comparable form
  • †
  • †Wyomingites
    • † – or unidentified comparable form

X[]

  • †Xenoceltites
    • †Xenoceltites cordilleranus
    • †Xenoceltites subevolutus
  • † – tentative report
    • † – type locality for species

Y[]

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

Z[]

  • Fossil of the Early Triassic-Eocene cycad-like frond Zamites
    †Zamites
    • †Zamites powelli
    • †Zamites tidwellii – type locality for species
  • † – type locality for genus
    • † – type locality for species
  • †Zygopleura
    • † – type locality for species


References[]

  1. ^ Lindsay E. Zanno; Ryan T. Tucker; Aurore Canoville; Haviv M. Avrahami; Terry A. Gates; Peter J. Makovicky (2019). "Diminutive fleet-footed tyrannosauroid narrows the 70-million-year gap in the North American fossil record". Communications Biology. 2: Article number 64. doi:10.1038/s42003-019-0308-7. PMC 6385174. PMID 30820466.
  2. ^ Lindsay E. Zanno; Ryan T. Tucker; Aurore Canoville; Haviv M. Avrahami; Terry A. Gates; Peter J. Makovicky (2019). "Diminutive fleet-footed tyrannosauroid narrows the 70-million-year gap in the North American fossil record". Communications Biology. 2: Article number 64. doi:10.1038/s42003-019-0308-7. PMC 6385174. PMID 30820466.
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