Classification of Squires and Demetrion 1990

G. Ostrea Linnaeus 1758
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†Ostrea cubitus Deshayes 1832
Fm. †Gryphaeidae Vialov 1936
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Subfm. Pycnodonteinae Stenzel 1959
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G. Pycnodonte Fischer von Waldheim 1835
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Subg. †Pycnodonte (Pegma) Squires and Demetrion 1990
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†Pycnodonte (Pegma) bajaensis Squires and Demetrion 1990
Subg. †Pycnodonte (Phygraea) Vyalov 1936
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†Pycnodonte (Phygraea) wratheri Stephenson 1936
Fm. Ostreidae Rafinesque 1815 [oyster]
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Subfm. Ostreinae Rafinesque 1815
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G. †Cubitostrea Sacco 1897
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†Cubitostrea mezquitalensis Squires and Demetrion 1990
Fm. Pectinidae Wilkes 1810 [scallop]
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G. †Batequeus Squires and Demetrion 1990
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†Batequeus mezquitalensis Squires and Demetrion 1990
Fm. Spondylidae Gray 1826
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G. Spondylus Linnaeus 1758
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†Spondylus batequensis Squires and Demetrion 1990
†Spondylus carlosensis Anderson 1905
†Spondylus cliffensis Hanna 1927
†Spondylus dumosus Morton 1834
Spondylus gaederopus Linnaeus 1758
†Spondylus perrini Wiedey 1928
†Spondylus rugosus Packard 1922
†Spondylus striatus Packard 1922
Subg. Pycnodonte (Pycnodonte) Fischer von Waldheim 1835
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†Pycnodonte (Pycnodonte) radiata Fischer de Waldheim 1835