Classification of Lydekker 1893
G. †Megalosaurus Parkinson 1822
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Invalid names: Ceratosaurus Marsh 1884 [synonym]
G. †Agathaumas Cope 1872
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†Agathaumas prorsus Marsh 1890
Invalid names: Ceratops Marsh 1888 [synonym], Triceratops Marsh 1889 [synonym]
G. †Hypsirophus Cope 1878
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†Hypsirophus ungulatus Marsh 1879
Invalid names: Stegosaurus Marsh 1877 [synonym]