Reptilia - Dinosauria - Pachycephalosauridae

Full reference: P. C. Sereno. 1997. The origin and evolution of dinosaurs. Annual Review of Earth and Planetary Sciences 25:435-489

Parent taxon: Pachycephalosauridae according to P. C. Sereno 1999

Sister taxa: Acrotholus, Alaskacephale, Amtocephale, Colepiocephale, Hanssuesia, Pachycephalosaurini, Pachycephalosaurus, Prenocephale, Stegoceras, Stygimoloch, Texacephale, Tylocephale, Domocephalinae, Gravitholus albertae

Subtaxa: none

Type: Pachycephalosaurus

Ecology: ground dwelling herbivore