Classification of the genus Gorbyoceras
G. †Gorbyoceras Shimizu and Obata 1935
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†Gorbyoceras alternestriatum Strand 1934
†Gorbyoceras clathroannulatum Roemer 1861
†Gorbyoceras gorbyi Miller 1894
†Gorbyoceras gracile Portlock 1843
†Gorbyoceras hammelli Foerste 1910
†Gorbyoceras tetreauense Wilson 1961
†Gorbyoceras textumaraneum Roemer 1861
Invalid names: Hammelloceras Shimizu and Obata 1935 [synonym]