Classification of Gibson 1987
G. Argopecten Monterosato 1889 [calico scallop]
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†Argopecten eboreus yorkensis Conrad 1867
G. †Chesapecten Ward and Blackwelder 1975
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†Chesapecten coccymelus Dall 1898
†Chesapecten madisonius Say 1824
†Chesapecten nefrens Ward and Blackwlder 1975
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Invalid names: Pecten madisonius Conrad 1840 [replaced]
G. Placopecten Verrill 1897
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†Placopecten clintonius clintonius Say 1824
Placopecten magellanicus Gmelin 1791