Classification of Ward 1998
G. Melanella Bowdich 1822
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†Melanella eborea Conrad 1846
†Melanella migrans Conrad 1846
G. Turritella Lamarck 1799 [turret shell]
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†Turritella cumberlandia Conrad 1863
†Turritella plebeia Say 1824
†Turritella tampae Heilprin 1887
G. Busycotypus
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†Busycotypus scalarispira Conrad 1863
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Invalid names: Busycotypus calvertensis Petuch 1989 [synonym]
G. Nassarius Duméril 1806
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†Nassarius sopora Pilsbry and Harbison 1933
†Nassarius trivittatoides Whitfield 1894
G. Scaphella Swainson 1832
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†Scaphella solitaria Conrad 1830
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Invalid names: Scaphella coronaspira Petuch 1989 [synonym], Scaphella sanctaemariae Petuch 1989 [synonym]
†Scaphella virginiana Conrad 1842
G. Modiolus Lamarck 1801
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†Modiolus ducatellii Conrad 1840
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Invalid names: Modiola inflata Tuomey and Holmes 1856 [synonym]
G. †Chesapecten Ward and Blackwelder 1975
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†Chesapecten coccymelus Dall 1898
†Chesapecten sayanus Dall 1898
G. †Chesacardium Ward 1992
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†Chesacardium craticuloides Conrad 1845
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Invalid names: Cardium patuxentium Glenn 1904 [synonym]
G. †Marvacrassatella Ward and Blackwelder 1987
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†Marvacrassatella melina Conrad 1832
G. Caryocorbula Gardner 1926
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†Caryocorbula cuneata Say 1824
†Caryocorbula subcontracta Whitfield 1894
G. Panopea Menard 1807
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†Panopea americana Conrad 1838
†Panopea whitfieldi Dall 1898
Subg. Mytilus (Mytiloconcha) Conrad 1862
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†Mytilus (Mytiloconcha) incurva Conrad 1839