Reptilia - Ornithischia - Pachycephalosauridae

Alternative combinations: Prenocephale edmontonensis, Sphaerotholus edmontonense, 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 D. C. Woodruff et al. 2021

See also Brown and Schlaikjer 1943, Currie 2000, Eberth 1997, Galton 1971, Giffin 1989, Kuhn 1964, Longrich et al. 2010, Mallon et al. 2015, Maryanska 1990, Maryanska et al. 2004, Olshevsky and Ford 1994, Russell and Chamney 1967, Schott et al. 2009, Schott and Evans 2017, Sues and Galton 1987, Sullivan 2000, Sullivan 2003, Sullivan 2006, Wall and Galton 1979, Watabe et al. 2011 and Williamson and Carr 2003

Sister taxa: Sphaerotholus buchholtzae, Sphaerotholus goodwini, Sphaerotholus lyonsi, Sphaerotholus triregnum

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

Distribution: found only at Big Valley Creek

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Specimen images are retrieved through the ePANDDA API.