Classification of Hall 1843
G. †Euomphalus Sowerby 1814
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†Euomphalus hemisphericus Hall 1843
†Euomphalus pervetusta Conrad 1838
†Euomphalus sulcata Hall 1843
G. †Loxonema Phillips 1841
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†Loxonema boydii Hall 1843
†Loxonema nexilis Sedgwick and Murchison 1840
G. †Strophomena Rafinesque and De Blainville 1824
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†Strophomena arctostriata Hall 1843
†Strophomena bifurcata Hall 1843
†Strophomena mucronata Hall 1843
†Strophomena pectinacea Hall 1843
†Strophomena setigera Hall 1843
G. †Pinnopsis Hall 1843
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†Pinnopsis acutirostra Hall 1843
†Pinnopsis ornatus Hall 1843