![]() After the war, the holotype of Dynamosaurus imperiosus and AMNH 5881 were also sold and now reside in the collections of the Natural History Museum, London (formerly the British Museum of Natural History), where they are known as BMNH R7994 and BMNH R7995, respectively. The specimen, now dubbed CM 9380, is still mounted in Pittsburgh. However, technical difficulties prevented the mount from being executed, and following the 1941 entry of the United States into World War II, the holotype was sold to the Carnegie Museum of Natural History in Pittsburgh for protection against possible bombing raids. Osborn planned to mount the similarly-sized AMNH 5027 and AMNH 973 together in dynamic poses as if they were fighting over a carcass. In total, Brown found five partial Tyrannosaurus skeletons. ![]() Brown also discovered the first complete skull of Tyrannosaurus rex, part of another specimen ( AMNH 5027) located in Montana in 1907. īoth of these specimens, as well as the hindlimbs of a third specimen ( AMNH 5881), were collected by Barnum Brown, assistant curator of the American Museum of Natural History and a famous paleontologist in his own right. Had it not been for page order, Dynamosaurus would have become the official name. Because the name Tyrannosaurus rex had appeared just one page earlier than Dynamosaurus in Osborn's 1905 work, it was considered the older name and has been used since. In 1906, after further preparation and examination, Henry Fairfield Osborn recognized both skeletons as belonging to the same species. At the time of their initial description and naming, these specimens had not been fully prepared and the type specimen of T. Another specimen ( AMNH 5866), found in Wyoming in 1900, was described in the same paper under the name Dynamosaurus imperiosus. state of Montana in 1902 and excavated over the next three years. The holotype of Tyrannosaurus rex, a partial skull and skeleton originally called AMNH 973 (AMNH stands for American Museum of Natural History), was discovered in the U.S. Tyrannosaurus rex discoveries are restricted to North America. ![]() ![]() In Montana in 1902, Barnum Brown dug up the four-foot-long femur of the first Tyrannosaurus rex found. 2.1.4 "Wankel Rex or Devil Rex": MOR 555. ![]()
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