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DinoOrigin.comPrehistoric Encyclopedia
Taxonomic Rank: Infraorder

Pachycephalosauria Dinosaurs

Bipedal ornithischians with extremely thickened skull domes reinforced by dense cortical bone.

Cataloged Pachycephalosauria Members (3 total)
Authoritative scientific paleoart reconstruction of Pachycephalosaurus (Pachycephalosaurus wyomingensis Gilmore, 1931) in lateral profilePachycephalosauria
Cretaceous PeriodHerbivore

Pachycephalosaurus

Pachycephalosaurus wyomingensis Gilmore, 1931

A bipedal ornithischian known for its 25-centimeter thick solid bone skull dome surrounded by bony knobs and spikes.

4.2–4.8 m (13.8–15.7 ft)
400–600 kg (882–1,323 lbs)
Authoritative scientific paleoart reconstruction of Prenocephale (Prenocephale prenes Maryańska & Osmólska, 1974) in lateral profilePachycephalosauria
Cretaceous PeriodHerbivore

Prenocephale

Prenocephale prenes Maryańska & Osmólska, 1974

A complete, high-domed pachycephalosaur from the Late Cretaceous Nemegt Basin of Mongolia.

2–2.4 m (6.6–7.9 ft)
30–50 kg (66–110 lbs)
Authoritative scientific paleoart reconstruction of Stegoceras (Stegoceras validum Lambe, 1902) in lateral profilePachycephalosauria
Cretaceous PeriodHerbivore

Stegoceras

Stegoceras validum Lambe, 1902

A small, bipedal pachycephalosaur from Alberta featuring an extremely thick, solid skull dome.

1.8–2.2 m (5.9–7.2 ft)
25–40 kg (55–88 lbs)