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.
- Pronounced: kaz-moe-sore-uss
- Means: Chasm lizard
- Where: North America
- When: Late Cretaceous
- Diet: Herbivorous
- Size of Adult: 17 ft (5.8 m) long
- Size of Animatronic Model: L 5 ft 5 in (1.66 m), H 2 ft 10 in (0.87 m)*
* includes height of steel base