This list of the Mesozoic life of Wyoming contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Wyoming and are between 252.17 and 66 million years of age.

A

  • †Abielites
    • †Abielites angusticarpus
  • Illustration of a living Acipenser sturgeon
    Acipenser
    • †Acipenser eruciferus
  • †Acutostrea
    • †Acutostrea plumosa
  • †Adocus
  • †Agathaumas – type locality for genus
  • †Agerostrea
    • †Agerostrea mesenterica
  • †Agialopous – type locality for genus
    • †Agialopous wyomingensis – type locality for species
  • Restoration of the Cretaceous-Pleistocene amphibian Albanerpeton
    †Albanerpeton
  • †Albertosaurus – or unidentified comparable form
  • †Alethesaurus – type locality for genus
    • †Alethesaurus quadratus – type locality for species
  • †Aletridelphys
    • †Aletridelphys florencae – type locality for species
    • †Aletridelphys hatcheri
  • †Allacodon
    • †Allacodon lentus – type locality for species
    • †Allacodon pumilis – type locality for species
  • †Allognathosuchus
  • Life restoration of the Late Jurassic theropod dinosaur Allosaurus
    †Allosaurus – type locality for genus
  • †Alostera
    • †Alostera saskatchewanensis – type locality for species
  • †Alphadon
  • †Altacreodus
  • †Alzadites
    • †Alzadites westonensis – type locality for species
  • †Amblotherium – type locality for genus
    • †Amblotherium gracilis – type locality for species
  • †Amborellites – type locality for genus
    • †Amborellites wyomingensis – type locality for species
  • A living Amia, or bowfin
    Amia
    • †Amia fragosa
    • †Amia uintaensis
  • †Amphicoelias
  • †Amphidon – type locality for genus
  • †Anaklinoceras
    • †Anaklinoceras mortoni
  • †Anaschisma – type locality for genus
    • †Anaschisma brachygnatha – type locality for species
    • †Anaschisma browni – type locality for species
  • †Anceptophyllum – type locality for genus
    • †Anceptophyllum pulcrum – type locality for species
  • †Anchura – tentative report
  • †Ancorichnus
  • †Andromeda
    • †Andromeda grayana
  • †Anemia
    • †Anemia fremonti
    • †Anemia subcretacea
  • Restoration of the Late Triassic phytosaur Angistorhinus
    †Angistorhinus – type locality for genus
  • †Anisoceras
  • †Anisomyon
    • †Anisomyon borealis
    • †Anisomyon centrale
    • †Anisomyon patelliformis
    • †Anisomyon subovatus – or unidentified related form
    • †Anisomyon subovulatus
  • †Ankistrorhynchus
    • †Ankistrorhynchus washakiensis – type locality for species
  • Image of restored specimen of a squat quadruped with knobby back
    Life restoration of the Late Cretaceous armored dinosaur Ankylosaurus
    †Ankylosaurus
  • †Anomalofusus – tentative report
  • Anomia
    • †Anomia tellinoides
  • Anona
    • †Anona robusta – tentative report
  • †Anthrotaxopsis
    • †Anthrotaxopsis tenuicaulis
  • Antrimpos
  • †Apatodonosaurus
    • †Apatodonosaurus grayi
  • †Apatosaurinae
    • †Apatosaurinae – type locality for genus – informal
  • Life restoration of the Late Jurassic sauropod dinosaur Apatosaurus
    †Apatosaurus
  • †Apeibopsis – tentative report
    • †Apeibopsis discolor
  • †Aploconodon – type locality for genus
  • Aporrhais
    • †Aporrhais biangulata
  • †Aquilina – type locality for genus
    • †Aquilina grossidentata – type locality for species
  • Aralia
    • †Aralia veatchii
  • †Araliaephyllum
    • †Araliaephyllum artocarpoides
  • Foliage and cones of a living Araucaria tree
    Araucaria
  • †Araucarites
    • †Araucarites cuneatus – type locality for species
    • †Araucarites longifolia
    • †Araucarites wyomingensis – type locality for species
  • Arca – report made of unidentified related form or using admittedly obsolete nomenclature
  • †Arcellites
    • †Arcellites disciformis
  • †Archaeotriakis
    • †Archaeotriakis ornatus – type locality for species
    • †Archaeotriakis rochelleae
  • †Archaeotrigon – type locality for genus
    • †Archaeotrigon brevimaxillus – type locality for species
  • Fossilized shells of the Middle Jurassic ammonoid cephalopod Arcticoceras
    †Arcticoceras
  • †Arenicolites
  • †Aristolochites
    • †Aristolochites brittoni
  • †Ascarinites – type locality for genus
    • †Ascarinites communis – type locality for species
  • Aspideretes
  • †Aspideretoides
    • †Aspideretoides foveatus – or unidentified comparable form
  • †Asplenites
    • †Asplenites tenellum
  • A living Asplenium, or spleenwort
    †Asplenium
    • †Asplenium haguei
    • †Asplenium neomexicanum
    • †Asplenium occidentale
  • †Astandes
    • †Astandes densatus
  • †Astarta
    • †Astarta packardi
  • Astarte
    • †Astarte gregaria
    • †Astarte livingstonensis
    • †Astarte meeki
    • †Astarte morion
  • †Athrotaxopsis
    • †Athrotaxopsis tenuicaulis
  • † Atira – tentative report
    • †Atira nebrascensis
  • †Atokatheridium – or unidentified comparable form
  • Illustration of fossilized teeth from the Late Cretaceous tyrannosaur Aublysodon
    †Aublysodon
  • †Austrotindaria
    • †Austrotindaria antiqua
    • †Austrotindaria canalensis
    • †Austrotindaria svalbardensis
  • †Avernalia – type locality for genus
    • †Avernalia solida – type locality for species

B

C

D

E

F

  • †Falepetrus
    • †Falepetrus barwini – type locality for species
  • Shell of a Fasciolaria, or tulip sea snail
    Fasciolaria
    • †Fasciolaria flexicostata – tentative report
  • †Feistmantelia – type locality for genus
    • †Feistmantelia oblonga – type locality for species
  • †Ficophyllum
    • †Ficophyllum serratum
  • Ficus
    • †Ficus fremonti
    • †Ficus Fremontii
    • †Ficus inaequalis
    • †Ficus paryearensis
    • †Ficus planicosta
    • †Ficus planicostata
    • †Ficus rockvalensis
    • †Ficus trinervis
  • †Filicites
    • †Filicites knowltoni
  • †Forresteria
    • †Forresteria stantoni
  • Known material diagram of the Late Jurassic ceratosaur Fosterovenator
    †Fosterovenator – type locality for genus
    • †Fosterovenator churei – type locality for species
  • †Foxraptor – type locality for genus
    • †Foxraptor atrox – type locality for species
  • †Fraxinus
    • †Fraxinus denticulata
    • †Fraxinus leii

G

  • Fossilized skull of the Late Jurassic long-necked dinosaur Galeamopus
    †Galeamopus
  • †Gargoyleosaurus
  • †Geinitzia
    • †Geinitzia Jenneyi – type locality for species
  • †Geonomites
    • †Geonomites schimperi
  • Gerrhonotus – or unidentified comparable form
  • †Gervillaria
    • †Gervillaria montanaensis
  • †Gervillia
    • †Gervillia dolabrata
    • †Gervillia ussurica – or unidentified comparable form
  • †Gilmoremys
  • Ginglymostoma
    • †Ginglymostoma globidens
  • Fossilized leaf of the Permian-modern tree Ginkgo
    Ginkgo
  • †Glasbius
    • †Glasbius intricatus – type locality for species
  • †Gleichenites
    • †Gleichenites sepulta
  • †Glyptops – type locality for genus
    • †Glyptops pervicax
    • †Glyptops plicatulus – type locality for species
  • Glyptostrobus
    • †Glyptostrobus brookensis
  • Mounted fossilized skeleton of the Middle Jurassic-Late Cretaceous mammal Gobiconodon
    †Gobiconodon
  • †Goniomya
    • †Goniomya montanaensis
  • †Goniopholis
  • †Gracilimanus
    • †Gracilimanus obscurus
  • †Grammatodon
    • †Grammatodon haguei
  • †Graphidula
    • †Graphidula alleni – or unidentified comparable form
    • Interior and exterior of a fossilized shell of the Late Triassic-Eocene marine bivalve Gryphaea
      †Graphidula culbertsoni
  • †Grewiopsis
    • †Grewiopsis saportana
  • †Gryphaea
    • †Gryphaea nebrascensis
    • †Gryphaea planoconvexa
  • †Gypsonictops
    • †Gypsonictops hypoconus – type locality for species
    • †Gypsonictops lewisi
  • †Gypsonicus
    • †Gypsonicus wyomingensis

H

I

J

Fossilized shell of the Late Cretaceous ammonoid cephalopod Jeletzkytes

K

Diagram illustrating the size of the Late Jurassic long-necked dinosaur Kaatedocus with an anachronistic human to scale

L

  • †Lamarqueavis
    • †Lamarqueavis minima – type locality for species
    • †Lamarqueavis petra – type locality for species
  • †Lamiasaura – type locality for genus
    • †Lamiasaura ferox – type locality for species
  • †Lanceosaurus – type locality for genus
    • †Lanceosaurus compressus – type locality for species
    • †Lanceosaurus hatcheri – type locality for species
  • †Laolestes – type locality for genus
  • †Laopteryx – type locality for genus
    • †Laopteryx priscus – type locality for species
  • †Laosaurus – type locality for genus
  • †Laurophyllum
    • †Laurophyllum coloradensis
    • †Laurophyllum meeki
    • †Laurophyllum salicifolium
    • †Laurophyllum wardiana
  • Laurus
    • †Laurus aspensis – type locality for species
  • †Lepidotes – or unidentified related form
  • Lepisosteus
    • †Lepisosteus occidentalis
  • †Leptalestes
  • Life restoration of the Late Cretaceous primitive horned dinosaur Leptoceratops
    †Leptoceratops
  • †Leptochamops
    • †Leptochamops denticulatus – type locality for species
    • †Leptochamops thrinax
  • †Leptochondria
    • †Leptochondria occidanea
  • †Leptostrobus
    • †Leptostrobus alatus – type locality for species
    • †Leptostrobus longifolia
    • †Leptostrobus longifolius
  • †Lesterwardia – type locality for genus
    • †Lesterwardia palustris – type locality for species
  • †Leucichthyops
    • †Leucichthyops vagans
  • †Leucicthyops
    • †Leucicthyops vagans
  • Lima
    • †Lima occidentalis
  • Lingula
    • †Lingula nitida – or unidentified comparable form
  • †Lingularia
    • †Lingularia borealis
  • †Lioplacodes – or unidentified comparable form
  • †Liostrea
    • †Liostrea strigilecula
  • Liquidambar
    • †Liquidambar fontanella – type locality for species
  • †Lisserpeton
  • Electron micrograph of fossilized teeth from the Early Jurassic-Early Cretaceous freshwater shark Lissodus
    †Lissodus
    • †Lissodus griffisi – type locality for species
  • †Litakis – type locality for genus
    • †Litakis gilmorei – type locality for species
  • †Lonchidion – type locality for genus
    • †Lonchidion selachos – type locality for species
  • †Lonchisaurus – type locality for genus
    • †Lonchisaurus trichurus – type locality for species
  • †Lonchodytes – type locality for genus
    • †Lonchodytes estesi – type locality for species
    • †Lonchodytes pterygius – type locality for species
  • †Lophochelys
  • A living Lunatia moon sea snail
    Lucina
    • †Lucina mattiformis – or unidentified comparable form
    • †Lucina occidentalis
    • †Lucina subundata
  • Lunatia – tentative report
  • Lygodium
    • †Lygodium AF030 – informal
  • †Lyosoma
    • †Lyosoma powelli

M

N

  • †Nageiopsis
    • †Nageiopsis angustifolia
    • †Nageiopsis longifolia
  • †Nanocuris
    • †Nanocuris improvida
  • †Nanomyops
  • †Nanosaurus
  • †Nanotyrannus – tentative report
  • †Naomichelys
    • †Naomichelys speciosa
  • A living Nelumbo lotus
    †Nelumbo
    • †Nelumbo weymouthi – type locality for species
    • †Nelumbo weymouthii
  • †Nemocardium
    • †Nemocardium parahillanum
  • †Nemodon
    • †Nemodon eufalensis
    • †Nemodon grandis
  • †Neocardioceras
  • †Neogastroplites
    • †Neogastroplites wyomingensis
  • †Neonereites – or unidentified comparable form
    • †Neonereites biserialis
  • †Neoplagiaulax
  • †Neoschizodus
    • †Neoschizodus laevigatus
  • †Nerinea – tentative report
  • †Neurankylus
    • †Neurankylus wyomingensis – type locality for species
  • †Nilsonia
    • †Nilsonia mehli
    • †Nilsonia nigricollensis
  • Nodosaria
  • Historical reconstruction of the holotype skeleton from 1921
    †Nodosaurus – type locality for genus
  • †Nonactaeonina
    • †Nonactaeonina attenuata
  • †Normannites – tentative report
    • †Normannites crickmayi – or unidentified comparable form
  • †Nortedelphys
    • †Nortedelphys jasoni
    • †Nortedelphys magnus
    • †Nortedelphys minimus
  • Interior of a fossilized shell of the Early Ordovician-modern marine bivalve Nucula
    Nucula
    • †Nucula cancellata
    • †Nucula nacatochana
    • †Nucula planimarginata
  • Nuculana
    • †Nuculana bisulcata
    • †Nuculana corsicana
    • †Nuculana equilateralis – tentative report
    • †Nuculana evansi
    • †Nuculana pittensis
  • †Nymphaeites
    • †Nymphaeites dawsoni

O

P

Q

  • †Quenstedtia
    • †Quenstedtia sublevis
    • A living Quercus, or oak tree
      †Quenstedtia sublewis
  • †Quercophyllum
    • †Quercophyllum gardneri
    • †Quercophyllum wyomingense – type locality for species
  • Quercus
    • †Quercus ellisiana
    • †Quercus stantoni
    • †Quercus stantonii
    • †Quercus viburnifolia
  • †Quereuxia
    • †Quereuxia angulata

R

  • †Raninella
  • †Reesidella
  • †Retinovena – type locality for genus
    • †Retinovena fluvialis – type locality for species
  • †Retispira
    • †Retispira bittneri
  • Rhabdocolpus – tentative report
  • †Rhaeboceras
    • †Rhaeboceras halli
    • †Rhaeboceras subglobosum
  • †Rhamnus
    • Micrograph with magnified inset of a fossilized tooth of the Late Cretaceous theropod dinosaur Richardoestesia
      †Rhamnus hirsuta
    • †Rhamnus minutus
  • Rhinobatos
    • †Rhinobatos casieri
  • †Rhizocorallium
  • †Rhynchosauroides – type locality for genus
    • †Rhynchosauroides palmatus – type locality for species
  • †Richardoestesia
  • †Ropalonaria
    • †Ropalonaria arachne
  • Rostellaria – tentative report
  • †Rotodactylus – or unidentified comparable form

S

T

U

  • †Ulmiphyllum
    • †Ulmiphyllum densinerve – type locality for species
  • †Uluops – type locality for genus
  • Unio
  • †Unionites
    • †Unionites fassaensis

V

  • Vanikoro
    • †Vanikoro ambigua
  • †Vanikoropsis
    • †Vanikoropsis nebrascensis
  • †Vaugonia
    • Leaves and fruit of a living Vitis, or grapevine
      †Vaugonia conradi
  • †Veniella
    • †Veniella mortoni
  • †Viburnum
    • †Viburnum marginatum
    • †Viburnum montanum
    • †Viburnum rotundifolium
  • Vitis
    • †"Vitis" stantoni[3]
  • Viviparus – or unidentified comparable form
  • †Volutoderma

W

Living Woodwardia ferns
  • †Weediaphyllum – type locality for genus
    • †Weediaphyllum parkensis – type locality for species
  • †Weichselia
    • †Weichselia reticulata
  • †Williamsonia – tentative report
    • †Williamsonia phoenicopsoides – type locality for species
  • †Woodwardia
    • †Woodwardia crenata

X

Life restoration of the Cretaceous bony fish Xiphactinus

Y

  • Yoldia
    • †Yoldia scitula – or unidentified related form
    • †Yoldia ventricosa

Z

Fossil of the Early Triassic-Eocene cycad-like frond Zamites

References

  1. 1 2 Scott Hartman; Mickey Mortimer; William R. Wahl; Dean R. Lomax; Jessica Lippincott; David M. Lovelace (2019). "A new paravian dinosaur from the Late Jurassic of North America supports a late acquisition of avian flight". PeerJ. 7: e7247. doi:10.7717/peerj.7247. PMC 6626525. PMID 31333906.
  2. 1 2 Neil H. Landman; W. James Kennedy; Neal L. Larson; Joyce C. Grier; James W. Grier; Tom Linn (2019). "Description of two species of Hoploscaphites (Ammonoidea, Ancyloceratina) from the Upper Cretaceous (Lower Maastrichtian) of the U.S. Western Interior". Bulletin of the American Museum of Natural History. 2019 (427): 1–72. doi:10.1206/0003-0090.427.1.1. hdl:2246/6926.
  3. ↑ Johnson, Kirk. (2002). Megaflora of the Hell Creek and lower Fort Union Formations in the western Dakotas: Vegetational response to climate change, the Cretaceous-Tertiary boundary event, and rapid marine transgression. 10.1130/0-8137-2361-2.329.
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