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Exogyra

noun
Ex·​o·​gy·​ra | \ ˌeksəˈjīrə\

Definition of Exogyra

: a genus of Upper Jurassic and Cretaceous bivalve mollusks that have thick shells and spirally twisted beak and are related to the true oysters

History and Etymology for Exogyra

New Latin, from exo- + -gyra (from Greek gyros ring, circle, from gyros round)

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