Classification of the genus Lophoceras
G. †Lophoceras Hyatt 1893
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†Lophoceras bifrons de Koninck 1878
†Lophoceras eichwaldi Shimanskiy 1967
†Lophoceras okense Tzwetaev 1898
†Lophoceras pentagonum Sowerby 1819
†Lophoceras regulus Eichwald 1857
†Lophoceras rossicum Shimansky 1957