Chasmosaurus was a medium size ceratopsian, or horned dinosaur but had features distinct from other ceratopsians.

Chasmosaurus had a vast triangular-shaped frill that was pierced by windows (or chasms) so big that they reduced the bony part of the frill into a light series of connected struts. It is believed the shield would have been covered in skin, and was probably brightly colored to act as a display organ.

Dino Facts

  • Pronounced: kaz-moe-sore-uss
  • Means: Chasm lizard
  • Size: 17 ft (5.8 m)
  • Where: North America
  • When: Late Cretaceous
  • Diet: Herbivorous