Reptilia - Dinosauria - Pachycephalosauridae

Alternative combinations: Prenocephale edmontonensis, Stegoceras edmontonense, Stegoceras edmontonensis, Troodon edmontonensis

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

Belongs to Sphaerotholus according to N. R. Longrich et al. 2010

Sister taxa: Prenocephale prenes, Sphaerotholus goodwini, Sphaerotholus buchholtzae, Sphaerotholus brevis

Type specimen: NMC, a skull. Its type locality is Big Valley Creek, which is in a Campanian/Maastrichtian terrestrial horizon in Canada.