Apatosaurus "Apatosaurus" may have been more solitary than other Morrison Formation dinosaurs. Fossils of the genus have only been found in the upper levels of the formation. Those of "Apatosaurus ajax" are known exclusively from the upper Brushy Basin Member, about 152–151 mya. "A.louisae" fossils are rare, known only from one site in the upper Brushy Basin Member; they date to the late Kimmeridgian stage, about 151mya. Additional "Apatosaurus" remains are known from similarly aged or slightly younger rocks, but they have not been identified as any particular species, and thus may instead belong to "Brontosaurus". The Morrison Formation records a
Lufeng Dinosaur Museum 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 2.4 meters to 9 meters in length are on display. In addition, there is a display of photographs and diagrams of