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Class: BIVALVIA
--- Taxon Tree: PTERIOMORPHIA [Subclass] - OSTREIDA [Order] - OSTREOIDEA [Superfamily]
------ Family: GRYPHAEIDAE Vyalov, 1936 (Sea)
------------ Genus: Exogyra Say, 1820 †
--------------- Species: Exogyra arietina (F.A. Roemer, 1849 ) † - ID: 7608000102
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Texas, Tarrant County - 23 mm FOSSIL Cretaceous
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synonyms: |
Ostrea arietina F.A. Roemer, 1849 †
Exogyra caprina T.A. Conrad, 1853 †
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------------------ Sub or form: Exogyra arietina coahuilensis Jones, 1938 † - ID: 7661000869
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Texas. El Paso - 23 mm FOSSIL Cretaceous
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