Pachycephalosaurus Brown and Schlaikjer 1943 (ornithischian)

Reptilia - Ornithischia

Synonyms: Dracorex Bakker et al. 2006, Stenotholus Giffin et al. 1988, Stygimoloch Galton and Sues 1983, Tylosteus Leidy 1872

Full reference: B. Brown and E. M. Schlaikjer. 1943. A study of the troödont dinosaurs with the description of a new genus and four new species. Bulletin of the American Museum of Natural History 82(5):115-150

Parent taxon: Eupachycephalosauria according to P.-E. Dieudonné et al. 2020

See also Bakker et al. 2006, Bonaparte 1978, Breithaupt 1985, Brown and Schlaikjer 1943, Butler et al. 2008, Carroll 1988, Charig 1967, Clemens 1986, Dodson 1983, Dong 1978, Eberth 1997, Eberth et al. 2001, Estes 1964, Galton 1974, Galton and Sues 1983, Giffin et al. 1988, Goodwin et al. 1998, Goodwin and Evans 2016, Hay 1902, Hay 1930, Kuhn 1964, Leidy 1873, Maryanska 1990, Maryanska et al. 2004, Maryańska and Osmólska 1974, McIntosh 1981, Olshevsky and Ford 1994, Ostrom 1965, Romer 1956, Romer 1966, Russell 1984, Russell 1987, Schott et al. 2009, Sereno 1986, Sereno 1997, Sereno 1998, Sereno 1999, Sereno 2000, Sternberg 1945, Sues 1997, Sues and Galton 1987, Sullivan 2003, Sullivan 2006, Swinton 1970, Tatarinov 1964, Thulborn 1974, Wall and Galton 1979, Williamson and Carr 2003, Williamson and Carr 2006, Williamson et al. 2009, Woodruff et al. 2021 and Zittel 1890

Sister taxa: Homalocephale, Prenocephale, Stegoceras

Subtaxa: Pachycephalosaurus wyomingensis

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Ecology: ground dwelling herbivore

Distribution:

• Cretaceous of Canada (2: Alberta collections), United States (28: Colorado, Montana, North Dakota, South Dakota, Wyoming)

Total: 30 collections including 32 occurrences

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Specimen images are retrieved through the ePANDDA API.


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