Apatosaurus which Marsh had described "Brontosaurus". Most of the skeleton was found, and after comparison with both "Brontosaurus" and "Apatosaurus ajax", Riggs realized that the holotype of "A.ajax" was immature, and thus the features distinguishing the genera were not valid. Since "Apatosaurus" was the earlier name, "Brontosaurus" should be considered a junior synonym of "Apatosaurus". Because of this, Riggs recombined "Brontosaurus excelsus" as "Apatosaurus excelsus". Based on comparisons with other species proposed to belong to "Apatosaurus", Riggs also determined that the Field Columbian Museum specimen was likely most similar to "A.excelsus". Despite Riggs' publication, Henry Fairfield Osborn, who was a strong
The Good Dinosaur The Good Dinosaur The Good Dinosaur is a 2015 American 3D computer-animated adventure film produced by Pixar Animation Studios and released by Walt Disney Pictures. The film is directed by Peter Sohn in his directorial debut from a screenplay by Meg LeFauve from an original idea by Bob Peterson. Set on a fictional Earth in which dinosaurs never became extinct, the film follows a young "Apatosaurus" named Arlo, who meets an unlikely human friend while traveling through a harsh and mysterious landscape. The film features the voices of Raymond Ochoa, Jack Bright, Sam Elliott, Anna Paquin, A.J. Buckley, Steve Zahn,