†unranked clade Pachycephalosaurini Sullivan 2003 (ornithischian)
Reptilia - Ornithischia - Pachycephalosauridae
Full reference: R. M. Sullivan. 2003. Revision of the dinosaur Stegoceras Lambe (Ornithischia, Pachycephalosauridae). Journal of Vertebrate Paleontology 23(1):181-207
Parent taxon: Pachycephalosauridae according to R. M. Sullivan 2006
See also Sullivan 2003 and Woodruff et al. 2021
Sister taxa: Amtocephale, Colepiocephale, Gravitholus, Hanssuesia, Pachycephalosaurinae, Texacephale, Tylocephale, Domocephalinae
Subtaxa: Alaskacephale
Ecology: ground dwelling herbivore
Distribution: found only at W side Colville River (UAM #AK-493-V-001) (Cretaceous of Alaska)