Classification of the genus Maccoyoceras
G. †Maccoyoceras Miller et al. 1933
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†Maccoyoceras discoidale Winchell 1862
†Maccoyoceras discors M'Coy 1844
†Maccoyoceras leveilleanum de Koninck 1844
†Maccoyoceras maccoyi Turner 1953
†Maccoyoceras pentagonum Korn et al. 2022
†Maccoyoceras wrightii Foord 1900