Classification of Lull 1933

†Triceratops sulcatus Marsh 1890
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†Triceratops maximus Brown 1933
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†Triceratops galeus Marsh 1889
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Or. †Ornithischia Seeley 1888 [ornithischian]
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Subor. †Ceratopsia Marsh 1890 [ceratopsian]
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Fm. †Protoceratopsidae Granger and Gregory 1923
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G. †Leptoceratops Brown 1914
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†Leptoceratops gracilis Brown 1914
G. †Protoceratops Granger and Gregory 1923
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†Protoceratops andrewsi Granger and Gregory 1923
G. †Tetrapodosaurus Sternberg 1932
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†Tetrapodosaurus borealis Sternberg 1932
G. †Notoceratops Tapia 1919 [southern horn face]
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†Notoceratops bonarelli Tapia 1919
Fm. †Ceratopsidae Marsh 1888 [ceratopsid]
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G. †Anchiceratops Brown 1914
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†Anchiceratops longirostris Sternberg 1926
†Anchiceratops ornatus Brown 1914
G. †Arrhinoceratops Parks 1925
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G. †Brachyceratops Gilmore 1914
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G. †Centrosaurus Lambe 1905
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†Centrosaurus apertus Lambe 1905
†Centrosaurus cutleri Brown 1917
†Centrosaurus flexus Brown 1914
G. †Ceratops Marsh 1888
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†Ceratops montanus Marsh 1888
G. †Chasmosaurus Lambe 1914
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†Chasmosaurus kaiseni Brown 1933
G. †Eoceratops Lambe 1915
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†Eoceratops canadensis Lambe 1902
G. †Monoclonius Cope 1876
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†Monoclonius crassus Cope 1876
†Monoclonius dawsoni Lambe 1902
G. †Pentaceratops Osborn 1923
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G. †Styracosaurus Lambe 1913
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†Styracosaurus ovatus Gilmore 1930
G. †Torosaurus Marsh 1891
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†Torosaurus gladius Marsh 1891
†Torosaurus latus Marsh 1891
G. †Triceratops Marsh 1889
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†Triceratops brevicornus Hatcher and Lull 1905
†Triceratops calicornis Marsh 1898
†Triceratops elatus Marsh 1891
†Triceratops hatcheri Lull 1905
†Triceratops obtusus Marsh 1898
†Triceratops prorsus Marsh 1890
†Triceratops serratus Marsh 1890
Invalid names: Bison alticornis Marsh 1887 [nomen dubium]