Classification of Longrich et al. 2010
Fm. †Pachycephalosauridae Sternberg 1945
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G. †Pachycephalosaurus Brown and Schlaikjer 1943
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†Pachycephalosaurus wyomingensis Gilmore 1931
G. †Stegoceras Lambe 1902
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†Stegoceras validum Lambe 1902
Invalid names: Ornatotholus Galton and Sues 1983 [synonym]
G. †Prenocephale Maryańska and Osmólska 1974
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†Prenocephale prenes Maryańska and Osmólska 1974
G. †Tylocephale Maryańska and Osmólska 1974
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†Tylocephale gilmorei Maryańska and Osmólska 1974
G. †Homalocephale Maryańska and Osmólska 1974
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†Homalocephale calathocercos Maryańska and Osmólska 1974
G. †Sphaerotholus Williamson and Carr 2003
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†Sphaerotholus brevis Lambe 1918
†Sphaerotholus buchholtzae Williamson and Carr 2003
†Sphaerotholus edmontonense Brown and Schlaikjer 1943
†Sphaerotholus goodwini Williamson and Carr 2003