page_title: List of the Mesozoic life of Arkansas
section_title: E
hierarchical_section_title: List of the Mesozoic life of Arkansas / E
caption_attribution_description: English: Exogyra costata from the Owl Creek Formation, Late Cretaceous, near Ripley, Mississippi.
context_page_description: This list of the Mesozoic life of Arkansas contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Arkansas and are between 252.17 and 66 million years of age.
context_section_description: †Echinocorys
  †Echinocorys texanus
  Ellisina
  †Ellisina saratogaensis – type locality for species
  †Escharoides – tentative report
  †Escharoides danei – type locality for species
  †Escharoides erymnos – type locality for species
  †Eutrephoceras
   †Exogyra
  †Exogyra costata
  †Exogyra ponderosa
caption: Interior of a fossilized shell of the Jurassic-Cretaceous foam oyster Exogyra
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