Torosaurus

Torosaurus was a large ceratopsid dinosaur. Its name means "perforated lizard", although often incorrectly interpreted as "bull lizard". It very much resembled it's cousin Triceratops, but had a much longer frill, with two large holes (or fenestrae). Many paleontologists now believe Torosaurus wasn't a distinct genus of dinosaur, but instead a Triceratops in it's most mature stage. One refutable objection to this theory is that Torosaurus had the aforementioned fenestrae in its frill, unlike Triceratops. Torosaurus may have lived in herds, like many of it's relatives, but experts are not sure, since no fossils have been found in large numbers. It was long thought to have the largest skull of any animal in history, but it seems in recent years that Pentaceratops has topped its record.

Appearances
Torosaurus has not appeared in any of the films or novels.

Jurassic Park-inspired games

 * In Jurassic Park: Operation Genesis, Torosaurus is featured as a two-star large herbivore. It is much more docile than Triceratops but still uses it's horns defensively. They are much more territorial than Triceratops, and will rut with each other in competition for dominance of the herd. It will occasionally attack Land Cruisers, albeit much less often than it's larger, more aggressive cousin . They're only capable of fighting small carnivore dinosaurs (Albertosaurus included).
 * It appeared in Jurassic Park: Explorer.
 * It is No.100 of the Herbivore Threes that can be created in Jurassic Park III: Park Builder
 * It is mentioned in Jurassic Park: The Game as being the same as Triceratops, despite the fact that Torosaurus had appeared as a separate genus in earlier games.