Classification of the genus Stylocyathus
G. †Stylocyathus d'Orbigny 1849
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†Stylocyathus besairiei Alloiteau 1958
†Stylocyathus coarctatus Quenstedt 1852
†Stylocyathus crassiseptus Alloiteau 1958
†Stylocyathus dentalinus d'Orbigny 1850
Invalid names: Stylotrochus Fromentel 1861 [synonym]