Classification of the subgenus Crassatella (Crassatella)
Subg. Crassatella (Crassatella) Lamarck 1799
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†Crassatella (Crassatella) lirasculpta Dockery 1982
†Crassatella (Crassatella) mississippiensis Conrad 1848
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†Crassatella (Crassatella) mississippiensis megacosta Dockery 1982
†Crassatella mississippiensis silverdalensis Kellum 1926