Classification of Osi et al. 2010
G. †Protoceratops Granger and Gregory 1923
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†Protoceratops andrewsi Granger and Gregory 1923
Unr. †Coronosauria Sereno 1986
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G. †Zuniceratops Wolfe and Kirkland 1998
Invalid names: Bagaceratopsidae Alifanov 2003 [empty]
G. †Archaeoceratops Dong and Azuma 1997
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†Archaeoceratops oshimai Dong and Azuma 1997