Classification of the genus Protanisoceras
G. †Protanisoceras
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Subg. †Protanisoceras (Heteroclinus) Casey 1961
Subg. †Protanisoceras (Protanisoceras) Spath 1923
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†Protanisoceras (Protanisoceras) creutzbergi Kakabadze and Hoedemaeker 1997
Subg. †Protanisoceras (Torquistylus) Casey 1961
†Protanisoceras acteon d'Orbigny 1850
†Protanisoceras blancheti Pictet and Campiche 1861