CerapodaDinosauriaLate CretaceousMarginocephaliaNeornithischiaNorth AmericaOrnithischiaPachycephalosauriaPachycephalosauridaePachycephalosaurinaeParapredentataPrionodontiaSulcimentisauria

Sphaerotholus triregnum

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Dinosaur: Sphaerotholus triregnum

Cretaceous: 83.6–72.1 Ma
Type: Pachycephalosauria

Length*:1.9 m6.2 ft
Weight*:25 kg55 lb
ESR: 1 / 4 (estimated size reliability)
*The largest known specimen



Locations


Sources

References: Nearly complete left squamosal.

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