Ornithischia Dinosaurs Reptiles Vertebrates Animals Existence

Pachycephalosauridae (Taxonomic Rank: Family)

Bipedal, herbivorous/omnivorous ornithischian dinosaurs with thick, heavily ossified skulls many of which were surrounded by nodes and/or spikes.

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	Alaskacephale Colepiocephale Dracorex Goyocephale Gravitholus Hanssuesia Homalocephale Micropachycephalosaurus Pachycephalosaurus Prenocephale Stegoceras Stygimoloch Texacephale Tylocephale Wannanosaurus

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