Classification of the genus Subprionocyclus
G. †Subprionocyclus
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†Subprionocyclus branneri Anderson 1902
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Invalid names: Prionotropis casperi Anderson 1958 [synonym], Prionotropis cristatus Billinghurst 1927 [synonym]
†Subprionocyclus hitchinensis Billinghurst 1927
†Subprionocyclus neptuni Geinitz 1849
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Invalid names: Oregoniceras jillsoni Anderson 1958 [synonym], Schloenbachia knighteni Anderson 1902 [synonym], Schloenbachia oregonensis Anderson 1902 [synonym], Schloenbachia siskiyouensis Anderson 1902 [synonym]
†Subprionocyclus normalis Anderson 1958
Invalid names: Oregoniceras Anderson 1958 [synonym]