Classification of Farke 2007
G. †Chasmosaurus Lambe 1914
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†Chasmosaurus belli Lambe 1902
†Chasmosaurus irvinensis Holmes et al. 2001
†Chasmosaurus russelli Sternberg 1940
G. †Torosaurus Marsh 1891
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G. †Triceratops Marsh 1889
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†Triceratops horridus Marsh 1889
†Triceratops prorsus Marsh 1890