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Fred Wierum, CC BY 4.0, via Wikimedia Commons · CC BY 4.0

Pachycephalosaurus wyomingensis

Period: Cretaceous· Maastrichtian
Age: 72.1–66 Ma
Diet: Herbivore
Length: 4.5 m
Height: 1.2–1.6 m
Mass: 370–450 kg
Found in: Hell Creek Formation, Lance Formation, Montana, Wyoming, South Dakota, North Dakota, United States
Classification: Dinosauria › Ornithischia › Pachycephalosauria › Pachycephalosauridae › Pachycephalosaurus › Pachycephalosaurus wyomingensis
Year described: 1931

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