CerapodaDinosauriaGenasauriaLate CretaceousMarginocephaliaNeornithischiaNorth AmericaOrnithischiaPachycephalosauriaPachycephalosauridaePachycephalosaurinaePachycephalosaurini

Pachycephalosaurus wyomingensis 

Dinosaur: Pachycephalosaurus wyomingensis 

Type: Pachycephalosauria

Length*: 4.8 m 15.7 ft
Weight*: 500 kg 1,102 lb
*The largest known specimen

ESR: 3.5 / 4 (estimated size reliability)


Material: More than 50 individuals ? (problematic).
References: Sullivan, Robert M. (2006). "A taxonomic review of the Pachycephalosauridae (Dinosauria:Ornithischia)". Evans, D C., Vavrek, M.J. & Larsson, H.C. (2015) "Pachycephalosaurid (Dinosauria: Ornithischia) cranial remains from the latest Cretaceous (Maastrichtian) Scollard Formation of Alberta, Canada".


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