CerapodaDinosauriaGenasauriaLate CretaceousMarginocephaliaNeornithischiaNorth AmericaOrnithischiaPachycephalosauriaPachycephalosauridaePachycephalosaurinae

Sphaerotholus buchholtzae

Dinosaur: Sphaerotholus buchholtzae

Type: Pachycephalosauria

Length*:1.8 m5.9 ft
Weight*:30 kg66 lb
ESR: 2 / 4 (estimated size reliability)
*The largest known specimen


Material: Partial skull. Referred more than 20 individuals.
References: Williamson, T. E., & Carr, T. D. (2002). A new genus of derived pachycephalosaurian from western North America. Mallon, J. C., Evans, D. C., Tokaryk, T. T., & Currie, M. L. (2015). First pachycephalosaurid (Dinosauria: Ornithischia) from the Frenchman Formation (upper Maastrichtian) of Saskatchewan, Canada. D. Cary Woodruff, Mark B. Goodwin, Tyler R. Lyson & David C. Evans (2021). Ontogeny and variation of the pachycephalosaurine dinosaur Sphaerotholus buchholtzae, and its systematics within the genus.


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