Full reference: W. P. Wall and P. M. Galton. 1979. Notes on pachycephalosaurid dinosaurs (Reptilia: Ornithischia) from North America, with comments on their status as ornithopods. Canadian Journal of Earth Sciences 16:1176-1186
Sister taxa: Acrotholus, Alaskacephale, Amtocephale, Colepiocephale, Hanssuesia, Pachycephalosaurinae, Pachycephalosaurini, Pachycephalosaurus, Prenocephale, Stegoceras, Stygimoloch, Texacephale, Tylocephale, Domocephalinae
Type specimen: RTMP 72.27.1, a skull. Its type locality is Jenner Ferry, which is in a Campanian terrestrial horizon in the Oldman Formation of Canada.
Ecology: ground dwelling herbivore