Classification of the genus Platycystites
G. †Platycystites Miller 1889
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†Platycystites cristatus Bassler 1943
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Invalid names: Platycystites bromidensis Bassler 1943 [synonym], Platycystites fimbriatus Bassler 1943 [synonym]
†Platycystites faberi Miller 1889
†Platycystites levatus Bassler 1943
†Platycystites ovalis Frest et al. 1979