Classification of Currie et al. 2008
G. †Protoceratops Granger and Gregory 1923
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†Protoceratops andrewsi Granger and Gregory 1923
G. †Pachyrhinosaurus Sternberg 1950
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†Pachyrhinosaurus canadensis Sternberg 1950
†Pachyrhinosaurus lakustai Currie et al. 2008
G. †Zuniceratops Wolfe and Kirkland 1998
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†Zuniceratops christopheri Wolfe and Kirkland 1998