Reptilia - Ornithischia - Pachycephalosauridae
Full reference: T. E. Williamson and T. D. Carr. 2003. A new genus of derived pachycephalosaurian from western North America. Journal of Vertebrate Paleontology 22(4):779-801
Parent taxon: Pachycephalosaurinae according to D. C. Woodruff et al. 2021
See also Jasinski 2015, Jasinski and Sullivan 2011, Longrich 2008, Mallon et al. 2015, Maryanska et al. 2004, Sullivan 2003, Sullivan 2006, Williamson and Carr 2003 and Williamson and Carr 2006
Sister taxa: Acrotholus, Foraminacephale, Platytholus
Subtaxa: Sphaerotholus buchholtzae Sphaerotholus edmontonensis Sphaerotholus goodwini Sphaerotholus lyonsi Sphaerotholus triregnum
Ecology: ground dwelling herbivore
Distribution:
• Cretaceous of Canada (3: Alberta, Saskatchewan collections), United States (3: Montana, New Mexico)
Total: 6 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.