Classification of Meek and Worthen 1860
G. †Euomphalus Sowerby 1814
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†Euomphalus planodorsatus Meek and Worthen 1860
†Euomphalus umbilicatus Meek and Worthen 1860
G. †Pleurotomaria Defrance 1826
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†Pleurotomaria chesterensis Meek and Worthen 1860
†Pleurotomaria granulostriata Meek and Worthen 1860
†Pleurotomaria pratteni Meek and Worthen 1860
†Pleurotomaria scitula Meek and Worthen 1860
†Pleurotomaria shumardi Meek and Worthen 1860
†Pleurotomaria speciosa Meek and Worthen 1860
†Pleurotomaria subconstricta Meek and Worthen 1860
†Pleurotomaria subsinuata Meek and Worthen 1860
†Pleurotomaria turbiniformis Meek and Worthen 1860
G. †Loxonema Phillips 1841
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†Loxonema cerithiformis Meek and Worthen 1860
†Loxonema nitidula Meek and Worthen 1860
†Loxonema rugosa Meek and Worthen 1860
†Loxonema scitula Meek and Worthen 1860
G. †Aviculopecten M'Coy 1851
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†Aviculopecten coxanus Meek and Worthen 1860
†Aviculopecten interlineatus Meek and Worthen 1860
†Aviculopecten pellucidus Meek and Worthen 1860
G. †Palasterina McCoy 1851
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Subg. †Palasterina (Schoenaster) Meek and Worthen 1860
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†Palasterina (Schoenaster) fimbriata Meek and Worthen 1860
Cl. †Pelecypoda Goldfuss 1820
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G. †Platyostoma Conrad 1842
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†Platyostoma nana Meek and Worthen 1860
†Platyostoma tumida Meek and Worthen 1861
G. †Macrocheilus Phillips 1841
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†Macrocheilus intercalaris Meek and Worthen 1860
†Macrocheilus medialis Meek and Worthen 1860
Subg. Leda (Yoldia) Möller 1842
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†Leda (Yoldia) levistriata Meek and Worthen 1860