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
Lufeng Dinosaur Museum dinosaurs from around the world. The museum includes the hall of ancient bronzeware and earthenware and the hall of ancient Pithecanthropus. Lufeng Dinosaur Museum The Lufeng Dinosaur Museum is located in Jingshan ("Golden Hill"), Lufeng County, Yunnan Province, China. Lufeng is the site of numerous Jurassic dinosaur discoveries, first found there in 1938. Most well known is Lufengosaurus, a Jurassic prosauropod. More recently, teeth and a skull of Ramapithecus, a Miocene period primate related to the orangutan, have been found in Lufeng. The Lufeng Dinosaur Museum includes the hall of ancient living beings where four complete dinosaur skeletons ranging from