Classification of the genus Pachydesma
Subg. Tivela (Pachydesma)
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†Pachydesma sulcataria Vokes 1939
†Tivela (Pachydesma) diabloensis Clark 1915
†Tivela (Pachydesma) gabbi Clark 1915
†Tivela (Pachydesma) inezana Conrad 1856
Tivela (Pachydesma) stultorum Mawe 1823
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Invalid names: Cytherea (Trigonella) crassatelloides Conrad 1837 [synonym], Tivela scarificata Berry 1940 [synonym]
Invalid names: Trigonella Conrad 1837 [replaced]