Classification of the suborder Pachycephalosauria

Unr. †Pachycephalosauria Maryańska and Osmólska 1974
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Unr. †Eupachycephalosauria Dieudonné et al. 2020
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G. †Homalocephale Maryańska and Osmólska 1974
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†Homalocephale calathocercos Maryańska and Osmólska 1974
G. †Pachycephalosaurus Brown and Schlaikjer 1943
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Invalid names: Dracorex hogwartsia Bakker et al. 2006 [synonym], Pachycephalosaurus grangeri Brown and Schlaikjer 1943 [synonym], Pachycephalosaurus reinheimeri Brown and Schlaikjer 1943 [synonym], Stygimoloch spinifer Galton and Sues 1983 [synonym], Tylosteus ornatus Leidy 1872 [synonym]
Invalid names: Dracorex Bakker et al. 2006 [synonym], Stygimoloch Galton and Sues 1983 [synonym], Tylosteus Leidy 1872 [synonym]
G. †Prenocephale Maryańska and Osmólska 1974
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†Prenocephale prenes Maryańska and Osmólska 1974
G. †Stegoceras Lambe 1902
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†Stegoceras novomexicanum Jasinski and Sullivan 2011
†Stegoceras validum Lambe 1902
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Invalid names: Ornatotholus browni Wall and Galton 1979 [synonym]
Invalid names: Hanssuessia Sullivan 2003 [synonym], Ornatotholus Galton and Sues 1983 [synonym]
G. †Goyocephale Perle et al. 1982
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†Goyocephale lattimorei Perle et al. 1982
Infraor. †Goyocephalia Sereno 1986
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Invalid names: Homalocephaloidea Sereno 1986 [empty]
Fm. †Pachycephalosauridae Sternberg 1945
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G. †Amtocephale Watabe et al. 2011
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†Amtocephale gobiensis Watabe et al. 2011
G. †Colepiocephale Sullivan 2003
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†Colepiocephale lambei Sternberg 1945
G. †Hanssuesia Sullivan 2003
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†Hanssuesia sternbergi Brown and Schlaikjer 1943
Subfm. †Pachycephalosaurinae Sereno 1997
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G. †Acrotholus Evans et al. 2013
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†Acrotholus audeti Evans et al. 2013
G. †Foraminacephale Schott and Evans 2017
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†Foraminacephale brevis Lambe 1918
G. †Platytholus Horner et al. 2023
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†Platytholus clemensi Horner et al. 2023
G. †Sphaerotholus Williamson and Carr 2003
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†Sphaerotholus buchholtzae Williamson and Carr 2003
†Sphaerotholus edmontonensis Brown and Schlaikjer 1943
†Sphaerotholus goodwini Williamson and Carr 2003
†Sphaerotholus lyonsi Woodruff et al. 2023
†Sphaerotholus triregnum Woodruff et al. 2023
Unr. †Pachycephalosaurini Sullivan 2003
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G. †Alaskacephale Sullivan 2006
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†Alaskacephale gangloffi Sullivan 2006
G. †Sinocephale Evans et al. 2021
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†Sinocephale bexelli Bohlin 1953
G. †Tylocephale Maryańska and Osmólska 1974
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†Tylocephale gilmorei Maryańska and Osmólska 1974
Invalid names: Gravitholus Wall and Galton 1979 [nomen dubium], Texacephale Longrich et al. 2010 [nomen dubium], Tholocephalidae Sereno 1986 [synonym]
G. †Qiyunshanpus Yu 1998
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Invalid names: Qiyunshanpus xiaohutianensis Yu 1998 [nomen nudum]
G. †Tianyulong Zheng et al. 2009
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†Tianyulong confuciusi Zheng et al. 2009
G. †Wannanosaurus Hou 1977
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Invalid names: Homalocephalidae Dong 1978 [empty], Pachycephalosauroidea Zhao 1983 [empty], Tianchungosauroidea Zhao 1983 [empty]