Pachycephalosaurus was among the last and largest of the dome-headed dinosaurs.

The animal's large dome head is believed to have been used as a battering ram. Its three kinds of teeth suggest that it fed on a mixed diet of leaves, seed, fruit and insects.

Dino Facts

  • Pronounced: pack-ee-seff-ah-low-sore-uss
  • Means: Thick-headed lizard
  • Size: 16 ft (5 m)
  • Where: North America (Montana, South Dakota, Wyoming)
  • When: Late Cretaceous
  • Diet: Herbivorous