This bird-hipped herbivore, whose relatives included Torosaurus and Styracosaurus, was a member of the ceratopsids, and though it was preyed upon by Tyrannosaurus rex, it could defend itself by goring.
In 1987, Cobabe and Fastovsky discovered a "new" dinosaur which they named Ugrosaurus, which turned out to be a specimen of this more famous dinosaur. In the 1990's, Dodson and Lehman confirmed the view of C.M. Sternberg that this dinosaur was more closely related to Chasmosaurus than to Monoclonius and Centrosaurus. The two major species of this dinosaur – horridus and prorsus – were discovered by Othniel Charles Marsh during the "Bone Wars". Because it was one of the last dinosaur genera to evolve, dinosaurs are taxonomically defined as the descendants of the last common ancestor of birds and this dinosaur. This bird-hipped herbivore, whose relatives included Torosaurus and Styracosaurus, was a member of the ceratopsids, and though it was preyed upon by Tyrannosaurus rex, it could defend itself by goring. For 10 points, name this dinosaur whose name refers to its three horns.
In 1987, Cobabe and Fastovsky discovered a "new" dinosaur which they named Ugrosaurus, which turned out to be a specimen of this more famous dinosaur.
{Triceratops}