Reptilia - Ornithischia - Pachycephalosauridae
Synonym: Tholocephalidae Sereno 1986
Full reference: C. M. Sternberg. 1945. Pachycephalosauridae proposed for dome-headed dinosaurs, Stegoceras lambei, n. sp., described. Journal of Paleontology 19(5):534-538
Parent taxon: Pachycephalosauria according to F.-L. Han et al. 2012
See also Bakker 1986, Benton 1979, Bonaparte 1978, Bonaparte 1980, Butler et al. 2008, Carroll 1988, Charig 1967, Cooper 1985, Dong 1978, Dong 1992, Eberth et al. 2001, Estes 1964, Evans et al. 2013, Galton 1971, Galton 1974, Goodwin et al. 1998, Jasinski and Sullivan 2011, Kuhn 1964, Kuhn 1966, Maryanska 1990, Maryanska et al. 2004, Maryańska and Osmólska 1974, McIntosh 1981, Norman 1984, Olshevsky and Ford 1994, Ostrom 1980, Parsch 1963, Peng et al. 2001, Romer 1956, Romer 1966, Rozhdestvensky 1977, Russell 1984, Sereno 1986, Sereno 1997, Sereno 1998, Sereno 1999, Sereno 2000, Sternberg 1945, Sues 1997, Sues and Galton 1987, Sues and Taquet 1979, Sullivan 2006, Swinton 1970, Tatarinov 1964, Thulborn 1974, Thulborn 1977, Wall and Galton 1979, Watabe et al. 2011, Williamson and Carr 2003, Woodruff et al. 2021 and Zhao 1983
Sister taxa: Eupachycephalosauria, Goyocephale, Goyocephalia, Homalocephalidae, Pachycephalosauroidea, Qiyunshanpus, Tianchungosauroidea, Tianyulong, Wannanosaurus
Subtaxa: Amtocephale Colepiocephale Domocephalinae Gravitholus Hanssuesia Pachycephalosaurinae Pachycephalosaurini Sinocephale Texacephale Tylocephale
Ecology: ground dwelling herbivore
Distribution:
• Cretaceous of Canada (44: Alberta, Saskatchewan collections), China (1), Mexico (1), Mongolia (3), United States (27: Alaska, Montana, New Mexico, North Dakota, South Dakota, Texas, Utah, Wyoming)
Total: 76 collections including 77 occurrences