CerapodaDinosauriaLate CretaceousMarginocephaliaNeornithischiaNorth AmericaOrnithischiaPachycephalosauriaPachycephalosauridaePachycephalosaurinaeParapredentataPrionodontiaSulcimentisauria

Sphaerotholus triregnum

Dinosaur: Sphaerotholus triregnum

Length*: 1.9 m 6.2 ft
Weight*: 25 kg 55 lb
*The largest known specimen

ESR: 1 / 4 (estimated size reliability)


References: Nearly complete left squamosal.


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