Classification of Clark and Woodford 1927
G. Trochocyathus Milne-Edwards and Haime 1848
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†Trochocyathus imperialis Nomland 1916
G. Dentalium Linnaeus 1758
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†Dentalium cooperi Gabb 1864
†Dentalium stramineum Gabb 1864
G. Calyptraea Lamarck 1799
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G. Turritella Lamarck 1799 [turret shell]
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†Turritella meganosensis Clark and Woodford 1927
†Turritella merriami Dickerson 1913
G. Gemmula Weinkauff 1875
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†Gemmula diabloensis Clark and Woodford 1927
†Gemmula wattsi Anderson and Hanna 1925
G. Glycymeris Da Costa 1778
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G. Crassatellites Krueger 1823
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†Crassatellites meganosensis Clark and Woodford 1927
G. †Dosiniopsis Conrad 1864
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†Dosiniopsis stewartvillensis Clark and Woodford 1927
G. Periploma Schumacher 1816
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†Periploma stewartvillensis Clark and Woodford 1927
Fm. Veneridae Rafinesque 1815 [venus clam]
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Subg. †Cardium (Protocardium) Beyrich 1845
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†Cardium (Protocardium) marysvillensis Dickerson 1916
Subg. Modiolus (Brachydontes) Swainson 1840
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†Modiolus (Brachydontes) ornatus Gabb 1864
Subg. Polinices (Euspira) Agassiz 1837
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†Polinices (Euspira) gesteri Dickerson 1916
†Polinices (Euspira) hornii Gabb 1864
†Polinices (Euspira) nuciformis Gabb 1864
Subg. †Admete (Bonellitia) Jousseaume 1887
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†Admete (Bonellitia) stantoni Dickerson 1913
G. Haminea Turton and Kingston 1830
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†Haminea postangulata Clark and Woodford 1927