Apatosaurus considered a junior synonym of "Apatosaurus"; its only species was reclassified as "A.excelsus" in 1903. A 2015 study concluded that "Brontosaurus" is a valid genus of sauropod distinct from "Apatosaurus", but not all paleontologists agree with this division. As it existed in North America during the late Jurassic, "Apatosaurus" would have lived alongside dinosaurs such as "Allosaurus", "Camarasaurus", "Diplodocus", and "Stegosaurus". "Apatosaurus" was a large, long-necked, quadrupedal animal with a long, whip-like tail. Its forelimbs were slightly shorter than its hindlimbs. Most size estimates are based on specimen CM3018, the type specimen of "A.louisae". In 1936 this was measured to
Jurassic Park: The Ride adult Stegosaurus and its young. Two Compsognathus were seen fighting over an empty popcorn box before the boat entered Hadrosaur Cove, where a Parasaurolophus poped up in front of the raft, and sprayed water at the riders. The Jurassic Park Animal Control called, revealing that the Parasaurolophus threw the raft off course, causing it to enter the raptor containment area, which was shown to be heavily damaged. Riders then encountered what appeared to be an abandoned tour raft, where a Dilophosaurus was seen eating the remains of a poncho. A nearby motorboat was also abandoned, sent by Jurassic Park Animal