Chasmosaurus

Chasmosaurus was a 17 foot long, long frilled ceratopsian.

Facts
Although smaller than its cousins, Chasmosaurus was the size of a rhino and was a peacefull herbivore. It had intimidating horns and was a dangerous creature for even tyrannosaurs to attack.

In other media
Chasmosaurus was shown as a minor character in planet dinosaur. It was shown peacfully eating veggies until an adult daspletosaurus disturbed it. It fended of the lone daspletosaurus and then went back to eating. Later the daspletosaurus came back with its family and killed the chasmosaurus.