“Spiked Lizard” discovered around 1913 by C.M. Sternberg in Dinosaur Provincial Park, Alberta, described & named in 1913 by Lawrence Lambe. Styracosaurus lived during the Cretaceous Period about 77 to 74 million years ago. It was 5 meters (18 feet) in length, 1.8 meters (6 feet) in height, & 3 tons in weight.
Styracosaurus was never encountered in the novels, but is presumed to be located in the Triceratops paddock, for obvious reasons. It’s coloration is based on common descriptions Michael Crichton gave to other animals.