Classification of the genus Oonoceras
G. †Oonoceras Hyatt 1884
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†Ooceras lativentrum Ruedemann 1906
†Ooceras perkinsi Ruedemann 1906
†Ooceras seelyi Ruedemann 1906
†Oonoceras priscum Eichwald 1861
Classification of the genus Oonoceras