Portugal. It was placed in Camarasaurus by John McIntosh in 1990, but was granted a new genus in 1998, Lourinhasaurus. Paleobiology Feeding Previously, scientists have suggested that Camarasaurus and other sauropods may have swallowed gastroliths (stones) to help grind the food in the stomach, regurgitating or passing them when they became too smooth. More recent analysis, however, of the evidence for stomach stones suggests this was not the case. The strong, robust teeth of Camarasaurus were more developed than those of most sauropods and were replaced on average every 62 days (M. D'Emic et al.), indicating that Camarasaurus may have masticated food in its mouth to some degree before swallowing. Other findings indicate that Camarasaurus spp. preferred vegetation different from other sauropods, allowing them to share the same environment without competing. Growth Long-bone histology enables researchers to estimate the age that a specific individual reached. A study by Griebeler et al. (2013) examined long-bone histological data and concluded that the Camarasaurus sp. CM 36664 weighed , reached sexual maturity at 20 years and died at age 26. Metabolism Eagle et al. performed clumped isotope thermometry on the enamel covering the teeth of various Jurassic sauropods, including Camarasaurus. Temperatures of were obtained, which is comparable to that of modern mammals. Paleopathology A Camarasaurus pelvis recovered from Dinosaur National Monument in Utah shows gouging attributed to Allosaurus and on the ilium of the C. lewisi holotype there are large Theropod bite marks. In 1992, a partial C. grandis skeleton was discovered at the Bryan Small Stegosaurus Quarry of the Morrison Formation near Canon City, Colorado. This specimen preserved a partial right humerus cataloged as DMNH 2908 and associated vertebrae from the back and tail. In 2001, Lorie McWhinney, Kenneth Carpenter, and Bruce Rothschild published a description of a pathology observed on the humerus. They noted a juxtacortical lesion 25 by 18 cm wide made of bone that resembled woven fibers. Although woven bone forms in accessory dental bone, in other locations, it is a sign of injury or illness. The woven bone's "undulating fibrous bundles" were observed oriented in the direction of the m. brachialis. The lesion's fusion and lack of porosity at its near and far ends indicate the periostitis was inactive or healed. McWhinney and the other researchers argued that this injury would have been a continuous source of hardship for the animal. It would have exerted pressure on the