![]() rex's skull was capable of growing over five feet (1.5 meters) in length and was extremely robustly-built. rex type specimen located at the Carnegie Museum of Natural History. rex lifespan is estimated at about 25 years old). It is believed that Sue and Scotty are among the oldest of their kind, currently known at 28 years old (in comparison, the average T. Despite its colossal proportions, theropods such as Spinosaurus and Giganotosaurus may have potentially surpassed T. The largest known specimen, RSM P2523.8 (AKA "Scotty"), measures around 12.6 meters in length, stood 3.9 meters tall at the hips, and weighed 10-11 tonnes although most fully-grown adults would have averaged 7-9 tonnes in weight and 11-12 meters (36-39 feet) in length. Tyrannosaurus rex was one of, if not the largest of the terrestrial carnivores & theropods of all time. However, despite similarities between the two, there were enough distinct traits between the two taxa that Tarbosaurus is now usually referred to as its own species, Tarbosaurus bataar (although some scientists classify it as a junior synonym). Tarbosaurus was also, at one point, categorized as a second Asian species of Tyrannosaurus. Brown's 1902 discovery of "Dynamosaurus imperiosus", has also been synonymous with Tyrannosaurus rex, as the Dynamosaurus holotype was reported showing osteoderms that belonged to Ankylosaurus, which the T.rex lived alongside with in Late-Cretacous North America. Many more individuals of the dinosaur have been discovered since, including ones that are nearly complete, show numerous ontogenetic stages, skin impressions, and even soft tissue. In 1905, Henry Fairfield Osborn named the skeleton "Tyrannosaurus rex", which is the name that has prevailed since.Ī recent, up to date skeletal reconstruction of the Tyrannosaurus specimen "Sue". When Barnum Brown and his crew made an expedition to Montana in 1900, they stumbled upon the first partial T.rex skeleton, and then a second one in 1902 that would be properly represented as the neotype specimen. This was heavily and inaccurately restored with a plaster using Allosaurus as the model, and has since been disassembled. The specimen was originally believed to have belong to that of a ceratopsian, but is currently considered a Nomen oblitum. rex skeleton, which he dubbed "Manospondylus gigas" (Greek for "Giant Thin Vertabrea"). They are considered as invalid by most paleontologists, because the difference between these species can be explained with individual variation or sexual dimorphism.Īn outdated skeletal restoration of the T.rex depicting the classic upright tail-dragging stance.Īlthough teeth and indeterminate fragments had been discovered prior, in 1892, paleontologist Edward Drinker Cope described the first known T. It was among the last non- avian dinosaurs to live prior to the K-T mass extinction event.Ī rather recent, although controversial study indicates that there could be three differentiated and varied species of Tyrannosaurus and proposed two new species: Tyrannosaurus imperator and Tyrannosaurus regina. However, one specimen, known as "Scotty", measured 12.6 meters (43 feet) in length, stood 3.9 meters at the hips, and weighed nearly 11 tons.įossils have been uncovered in North and South Dakota, Texas, Montana, Colorado, Wyoming, and Saskatchewan within a depositional formation known as the "Hell Creek". There are other specimens estimated to be larger than Sue but this information is debated. rex was nicknamed "Sue" (located at Chicago's Field Museum of Natural History, which is roughly 90% complete), measuring approximately 12.3+ meters (40+ feet) in length, around 3.8 meters high at the hips, and over 9 tonnes in weight, making it amongst the biggest terrestrial carnivores & biggest theropods that ever existed. rex, is a species of tyrannosaurian theropod dinosaur that flourished during the Maastrichtian age of the Late Cretaceous epoch, 68-66 million years ago.Įver since its discovery, Tyrannosaurus has become one of if not the most popular of its kind as over 50 individuals of this taxon have been unearthed. Tyrannosaurus rex (Greek for "tyrant lizard king"), or more commonly abbreviated as T. Dinotyrannus megagracilis (Olshevsky, 1995)Īpproximate distribution range of Tyrannosaurus rex.Nanotyrannus lancensis? (Gilmore, 1946).Albertosaurus lancensis? (Gilmore, 1946).Tyrannosaurus imperiosus? (Osborn, 1905).Dynamosaurus imperiosus? (Osborn, 1905).Nanotyrannus ( Bakker, Williams and Currie, 1988). ![]() ![]() ![]() Reconstruction of Tyrannosaurus by Gabriel Ugueto
0 Comments
Leave a Reply. |