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