Classification of the genus Hyphantoceras
G. †Hyphantoceras Hyatt 1900
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Subg. †Hyphantoceras (Hyphantoceras) Hyatt 1900
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†Hyphantoceras (Hyphantoceras) reussianum d'Orbigny 1850
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Invalid names: Helicoceras annulifer Roemer 1870 [synonym]
Subg. †Hyphantoceras (Madagascarites) Collignon 1966
†Hyphantoceras ceratopse Anderson 1902
†Hyphantoceras irregulare Anderson 1958
†Hyphantoceras oshimai Yabe 1904
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Invalid names: Didymoceras orestimbense Anderson 1958 [synonym]
†Hyphantoceras plicatum d'Orbigny 1842
†Hyphantoceras venustum Yabe 1904
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Invalid names: Bostrychoceras buttense Anderson 1958 [synonym], Hyphantoceras laqueum Anderson 1958 [synonym]
Invalid names: Euhyphantoceras Shimizu 1935 [synonym]