First discovered in 1889 in Wyoming, and then named in 1891, all Torosaurus fossils have been found in the western United States and Canada. The Torosaurus was a bird-hipped, herbivorous dinosaur that probably weighed around 4 tons. It used a beak like mouth to shear tough vegetation, and it also had the largest skull of any land animal yet discovered, with fossilized skulls measuring 8 feet in length. The skull also included a massive frill which had two large symmetrical openings, which possibly existed in order to cut off some weight. In addition, the Torosaurus had three large horns, two immediately above the eye socket, and one smaller one on the snout, all of which face forward.
|Image from Texas Geology|