page_title: List of the Mesozoic life of Oregon
section_title: A
hierarchical_section_title: List of the Mesozoic life of Oregon / A
caption_attribution_description: English: Fossil Inoceramus (Actinoceramus) sulcatus from the Albian age of England at Gallery of Paleontology and Comparative Anatomy, Paris.
context_page_description: This list of the Mesozoic life of Oregon contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Oregon and are between 252.17 and 66 million years of age.
context_section_description: †Acanthocircus
  †Acanthocircus carinatus – or unidentified related form
  †Acanthocircus rotundus – or unidentified related form
  †Acanthodiscus
  †Acanthodiscus subradiatus – or unidentified related form
   †Actinoceramus
  †Actinoceramus salomoni
  †Actinoceramus subsulcatus
  †Actinoceramus sulcatus
  †Agerchlamys
  †Agerchlamys boellingi
  †Alpinophragmium – tentative report
  †Amblysiphonella
  †Amblysiphonella steinmanni – or unidentified comparable form
  †Amblysiphonella timorica
  †Ampakabastraea
  †Ampakabastraea cowichanensis
  †Anahamulina
  †Anahamulina wilcoxensis
  †Anatropites
  †Andrazella
  †Angulobracchia
  †Angulobracchia bulbosa
  †Anoptychia
  †Anoptychia oregonensis – type locality for species
  †Antexitus – type locality for genus
  †Antexitus inusitatus – type locality for species
  †Antexitus pessagnoi – type locality for species
  †Antexitus southforkensis – type locality for species
  †Antexitus yangi – type locality for species
  †Anthostylis
  †Anthostylis acanthophora – or unidentified comparable form
  †Antiquilima
  †Apiotrigonia
  †Apiotrigonia condoni
  †Arcavicula – tentative report
   †Arcestes
  †Arcestes gigantogaleatus – or unidentified comparable form
  †Archaeocenosphaera
  †Archaeocenosphaera laseekensis
  †Archaeodictyomitra
  †Archaeodictyomitra exigua
  †Archaeodictyomitra primigena
  †Archaeohagiastrum
  †Archaeohagiastrum munitum – or unidentified related form
  †Archaeohagiastrum oregonense – type locality for species
  †Archaeospongoprunum
  †Archaeospongoprunum helense
  †Archaeospongoprunum praeimlayi
  †Arietoceltites
   Astarte
  †Astraeomorpha
  †Astraeomorpha confusa
  †Astraeomorpha crassisepta
  †Austrisaturnalis
  †Austrisaturnalis quadriradiatus – or unidentified related form
caption: Fossilized shells of the Early-Late Cretaceous marine bivalve Actinoceramus
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