Classification of Maryanska and Osmólska 1975

Subor. †Ceratopsia Marsh 1890 [ceratopsian]
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Fm. †Protoceratopsidae Granger and Gregory 1923
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G. †Bagaceratops Maryanska and Osmólska 1975
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†Bagaceratops rozhdestvenskyi Maryanska and Osmólska 1975
G. †Leptoceratops Brown 1914
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†Leptoceratops gracilis Brown 1914
G. †Microceratops Bohlin 1953
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†Microceratops gobiensis Bohlin 1953
†Microceratops sulcidens Bohlin 1953
G. †Montanoceratops Sternberg 1951
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†Montanoceratops cerorhynchus Brown and Schlaikjer 1942
G. †Protoceratops Granger and Gregory 1923
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†Protoceratops kozlowskii Maryanska and Osmólska 1975