Classification of Dodson 1997

Unr. †Ornithischia Seeley 1888 [ornithischian]
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Unr. †Marginocephalia Sereno 1986
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Unr. †Ceratopsia Marsh 1890 [ceratopsian]
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Infraor. †Neoceratopsia Sereno 1986
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Fm. †Ceratopsidae Marsh 1888 [ceratopsid]
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Subfm. †Centrosaurinae Lambe 1915
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G. †Achelousaurus Sampson 1994
G. †Avaceratops Dodson 1986
G. †Brachyceratops Gilmore 1914
G. †Centrosaurus Lambe 1905
G. †Einiosaurus Sampson 1994
G. †Monoclonius Cope 1876
G. †Pachyrhinosaurus Sternberg 1950
G. †Styracosaurus Lambe 1913
Subfm. †Chasmosaurinae Lambe 1915
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G. †Anchiceratops Brown 1914
G. †Arrhinoceratops Parks 1925
G. †Chasmosaurus Lambe 1914
G. †Pentaceratops Osborn 1923
G. †Torosaurus Marsh 1891
G. †Triceratops Marsh 1889
Fm. †Protoceratopsidae Granger and Gregory 1923
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G. †Bagaceratops Maryanska and Osmólska 1975
G. †Breviceratops Kurzanov 1990
G. †Leptoceratops Brown 1914
G. †Montanoceratops Sternberg 1951
G. †Protoceratops Granger and Gregory 1923
G. †Udanoceratops Kurzanov 1992
Fm. †Psittacosauridae Osborn 1923