Post by poseidon on Jul 31, 2021 20:53:45 GMT -5
Paraceratherium is an extinct genus of hornless rhinoceros. It is one of the largest terrestrial mammals that has existed and lived from the early to late Oligocene epoch (34–23 million years ago). The first fossils were discovered in what is now Pakistan, and remains have been found across Eurasia between China and the Balkans. It is classified as a member of the hyracodont subfamily Indricotheriinae. Paraceratherium means "near the hornless beast", in reference to Aceratherium, the genus in which the type species A. bugtiense was originally placed. The exact size of Paraceratherium is unknown because of the incompleteness of the fossils. The shoulder height was about 4.8 metres (15.7 feet), and the length about 7.4 metres (24.3 feet). Its weight is estimated to have been about 15 to 20 tonnes (33,000 to 44,000 lb). The long neck supported a skull that was about 1.3 metres (4.3 ft) long. It had large, tusk-like incisors and a nasal incision that suggests it had a prehensile upper lip or proboscis (trunk). The legs were long and pillar-like. The lifestyle of Paraceratherium may have been similar to that of modern large mammals such as the elephants and extant rhinoceroses. Because of its size, it would have had few predators and a slow rate of reproduction. It was a browser, eating mainly leaves, soft plants, and shrubs. It lived in habitats ranging from arid deserts with a few scattered trees to subtropical forests. The reasons for the animal's extinction are unknown, but various factors have been proposed.
Carcharodontosaurus /ˌkɑːrkəroʊˌdɒntoʊˈsɔːrəs/ is a genus of large carcharodontosaurid theropod dinosaur that existed during the Cenomanian stage of the mid-Cretaceous Period in Northern Africa. It is currently known to include two species: C. saharicus and C. iguidensis, which are among the largest theropods, nearly as large as or even larger than Tyrannosaurus, Giganotosaurus, and Spinosaurus. Carcharodontosaurus includes some of the longest and heaviest known carnivorous dinosaurs, with various scientists proposing length estimates for the species C. saharicus ranging between 12 and 13.3 meters (39 and 44 ft) and weight estimates between 6.2 to 15.1 metric tons (6.8 to 16.6 short tons).[6][7][8][9] In 2016 Molina-Pérez & Larramendi gave a length of 12.8 meters (42 ft) and a weight of 7.8 metric tons (8.6 short tons) for the neotype of C. saharicus, and a length of 11 meters (36 ft) and a weight of 5.2 metric tons (5.7 short tons) for a referred tooth of C. iguidensis.
Carcharodontosaurus were carnivores, with enormous jaws and long, serrated teeth up to eight inches long. A skull length of about 1.42–1.6 m (4.7–5.2 ft) has been restored for the neotype of C. saharicus. Currently, the largest-known theropod skull belongs to another huge carcharodontosaurid dinosaur, the closely related Giganotosaurus (with skull length estimates up to 1.95 m (6.4 ft)) but this has been disputed. Gregory S. Paul estimates Carcharodontosaurus iguidensis at 10 meters (33 ft) and 4 metric tons (4.4 short tons).
Carcharodontosaurus /ˌkɑːrkəroʊˌdɒntoʊˈsɔːrəs/ is a genus of large carcharodontosaurid theropod dinosaur that existed during the Cenomanian stage of the mid-Cretaceous Period in Northern Africa. It is currently known to include two species: C. saharicus and C. iguidensis, which are among the largest theropods, nearly as large as or even larger than Tyrannosaurus, Giganotosaurus, and Spinosaurus. Carcharodontosaurus includes some of the longest and heaviest known carnivorous dinosaurs, with various scientists proposing length estimates for the species C. saharicus ranging between 12 and 13.3 meters (39 and 44 ft) and weight estimates between 6.2 to 15.1 metric tons (6.8 to 16.6 short tons).[6][7][8][9] In 2016 Molina-Pérez & Larramendi gave a length of 12.8 meters (42 ft) and a weight of 7.8 metric tons (8.6 short tons) for the neotype of C. saharicus, and a length of 11 meters (36 ft) and a weight of 5.2 metric tons (5.7 short tons) for a referred tooth of C. iguidensis.
Carcharodontosaurus were carnivores, with enormous jaws and long, serrated teeth up to eight inches long. A skull length of about 1.42–1.6 m (4.7–5.2 ft) has been restored for the neotype of C. saharicus. Currently, the largest-known theropod skull belongs to another huge carcharodontosaurid dinosaur, the closely related Giganotosaurus (with skull length estimates up to 1.95 m (6.4 ft)) but this has been disputed. Gregory S. Paul estimates Carcharodontosaurus iguidensis at 10 meters (33 ft) and 4 metric tons (4.4 short tons).