Classification of the genus Orthonybyoceras
G. †Orthonybyoceras Shimizu and Obata 1935
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†Orthonybyoceras covingtonense Foerste and Teichert 1930
†Orthonybyoceras dyeri Miller 1875
†Orthonybyoceras isakari Kröger and Aubrechtova 2017
†Orthonybyoceras moisense Kröger and Aubrechtova 2017
Invalid names: Siberioceras [synonym]