Classification of Marsh 1889
Subor. †Stegosauria Marsh 1877
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Fm. †Ceratopsidae Marsh 1888 [ceratopsid]
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G. †Triceratops Marsh 1889
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†Triceratops flabellatus Marsh 1889
†Triceratops galeus Marsh 1889
†Triceratops horridus Marsh 1889