Pachycephalosaurus

Late Cretaceous (68-66 Ma)Herbivore/OmnivorePachycephalosauria

PeriodLate Cretaceous (68-66 Ma)

DietHerbivore/Omnivore

Length4.5 m

Weight450 kg

LocationWestern North America

ClassificationPachycephalosauria

About Pachycephalosaurus

The dome-headed dinosaur with a skull roof up to 25 cm thick of solid bone. Long thought to head-butt each other like rams, but recent studies suggest flank-butting was more likely. Had small knobby spikes around the dome. One of the last non-avian dinosaurs. Related to Ceratopsians.

Size

4.5 m longArgentinosaurus: 35 m

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