was discovered in 2005 in the Snowy Mountains region of central Montana and consists of a nearly complete skull and several postcranial elements. Fossil record Camarasaurus fossils are very common. Over 500 specimens are known, including many isolated bones and about 50 partial skeletons. It is found in a wide area over the western United States, from as far north as Montana to as far south as New Mexico, in rocks of the Morrison Formation. Due to this abundance, Camarasaurus is a very well-known sauropod. A juvenile specimen of Camarasaurus, CM 11338, is the most complete sauropod skeleton ever discovered. Numerous skulls are known. Even though complete necks are rarely found in sauropods, five specimens of Camarasaurus preserve all or nearly all of the cervical vertebrae. Most identifiable specimens of Camarasaurus belong to one of two species, C. grandis and C. lentus; C. lewisi and C. supremus are rarer. Description Camarasaurus is among the most common and frequently well-preserved sauropod dinosaurs uncovered and has been well described in numerous publications. Similar to other Macronarians, it had the typical large naris, long forelimbs, and short tail compared to the contemporary Diplodocids. Camarasaurus was a medium-sized sauropod compared to contemporary species in the same formation, but in the Tithonian reached large sizes with C. supremus. The maximum size of the most common species, C. lentus, was about 15 m (49 ft) in length. The largest species, C. supremus, reached a maximum length of 23 m (75 ft) and, a maximum estimated weight of 47 metric tons (51.8 tons). The arched skull of Camarasaurus was remarkably square and the blunt snout had many fenestrae. The robust skull of Camarasaurus preserves much better than many other sauropods, unlike the gracile skulls that Diplodocids that are also found in the Morrison Formation. The 19-cm-long (7.5-in) teeth were shaped like chisels (spatulate) and arranged evenly along the jaw. The strength of the teeth indicates that Camarasaurus probably ate coarser plant material than the slender-toothed diplodocids. A specimen of Camarasaurus called SMA 0002 (which has also been assigned to Cathetosaurus) from Wyoming's Howe-Stephens Quarry, referred to as "E.T.", shows evidence of soft tissue. Along the jaw line, ossified remains of what appear to have been the animal's gums have been recovered, indicating that it had deep-set teeth covered by gums, with only the tips of the crowns protruding. The teeth were, upon death, pushed further out from