Classification of the genus Gentoniceras
Subg. †Calycoceras (Gentoniceras) Thomel 1972
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†Calycoceras (Gentoniceras) boehmi Spath 1926
†Calycoceras (Gentoniceras) gentoni Brongniart 1822
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Invalid names: Eucalycoceras subgentoni Spath 1926 [synonym]
†Calycoceras (Gentoniceras) leonense Adkins 1928