page_title: List of the Mesozoic life of Wyoming
section_title: A
hierarchical_section_title: List of the Mesozoic life of Wyoming / A
caption_attribution_description: Polski: Amia calva. Amia calva
context_page_description: 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.
context_section_description: †Abielites
  †Abielites angusticarpus
   Acipenser
  †Acipenser eruciferus
  †Acutostrea
  †Acutostrea plumosa
  †Adocus
  †Agathaumas – type locality for genus
  †Agathaumas sylvestris – type locality for species
  †Agerostrea
  †Agerostrea mesenterica
  †Agialopous – type locality for genus
  †Agialopous wyomingensis – type locality for species
   †Albanerpeton
  †Albanerpeton galaktion
  †Albanerpeton nexuosus – type locality for species
  †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
   †Allosaurus – type locality for genus
  †Allosaurus fragilis – type locality for species
  †Allosaurus jimmadseni
  †Alostera
  †Alostera saskatchewanensis – type locality for species
  †Alphadon
  †Alphadon attaragos – type locality for species
  †Alphadon halleyi
  †Alphadon marshi
  †Alphadon sahnii
  †Altacreodus
  †Altacreodus magnus
  †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
   Amia
  †Amia fragosa
  †Amia uintaensis
  †Amphicoelias
  †Amphicoelias brontodiplodocus – type locality for species
  †Amphidon – type locality for genus
  †Amphidon superstes – type locality for species
  †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
   †Angistorhinus – type locality for genus
  †Angistorhinus aeolamnis – type locality for species
  †Angistorhinus gracilis – type locality for species
  †Angistorhinus grandis – type locality for species
  †Angistorhinus maximus – type locality for species
  †Anisoceras
  †Anisomyon
  †Anisomyon borealis
  †Anisomyon centrale
  †Anisomyon patelliformis
  †Anisomyon subovatus – or unidentified related form
  †Anisomyon subovulatus
  †Ankistrorhynchus
  †Ankistrorhynchus washakiensis – type locality for species
   †Ankylosaurus
  †Ankylosaurus magniventris
  †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
   †Apatosaurus
  †Apatosaurus louisae
  †Apatosaurus minimus
  †Apeibopsis – tentative report
  †Apeibopsis discolor
  †Aploconodon – type locality for genus
  †Aploconodon comoensis – type locality for species
  Aporrhais
  †Aporrhais biangulata
  †Aquilina – type locality for genus
  †Aquilina grossidentata – type locality for species
  Aralia
  †Aralia veatchii
  †Araliaephyllum
  †Araliaephyllum artocarpoides
    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
   †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
   †Asplenium
  †Asplenium haguei
  †Asplenium neomexicanum
  †Asplenium occidentale
  †Astandes
  †Astandes densatus
  †Astarta
  †Astarta packardi
  Astarte
  †Astarte gregaria
  †Astarte livingstonensis
  †Astarte meeki
  †Astarte morion
  †Athrotaxopsis
  †Athrotaxopsis te
caption: A living Amia, or bowfin
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