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Mounted skeletons of Tyrannosaurus (left) and Apatosaurus (right) at the AMNH. Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago, although the exact origin and timing of the evolution of dinosaurs is the subject of active research.
The largest dinosaur known from Australia, comparable in size to large South American dinosaurs. Potentially a synonym of the contemporary Diamantinasaurus [2] Australovenator: 2009 Winton Formation (Late Cretaceous, Cenomanian) Australia: Analysis of its arms suggests it was well-adapted to grasping [3] Austrosaurus: 1933
While the dinosaurs' modern-day surviving avian lineage (birds) are generally small due to the constraints of flight, many prehistoric dinosaurs (non-avian and avian) were large-bodied—the largest sauropod dinosaurs are estimated to have reached lengths of 39.7 meters (130 feet) and heights of 18 m (59 ft) and were the largest land animals of ...
This is a list of non-avian dinosaurs whose remains have been recovered in Africa. Africa has a rich fossil record. It is rich in Triassic and Early Jurassic dinosaurs. African dinosaurs from these time periods include Megapnosaurus, Dracovenator, Melanorosaurus, Massospondylus, Euskelosaurus, Heterodontosaurus, Abrictosaurus, and Lesothosaurus.
Ornithopoda (/ ˌ ɔːr n ə ˈ θ ɒ p ə d ə /) [2] is a clade of ornithischian dinosaurs, called ornithopods (/ ˈ ɔːr n ə θ ə ˌ p ɒ d z, ɔːr ˈ n ɪ θ-/). [3] [4] They represent one of the most successful groups of herbivorous dinosaurs during the Cretaceous.
There is no complete, canonical list of all dinosaur taxa or holotype specimens. Attempts are regularly published in the form of books, such as the Princeton Field Guide to Dinosaurs by Gregory Paul [3] and Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages by Thomas Holtz and Luis Rey. [4]
Dinosaur classification began in 1842 when Sir Richard Owen placed Iguanodon, Megalosaurus, and Hylaeosaurus in "a distinct tribe or suborder of Saurian Reptiles, for which I would propose the name of Dinosauria." [1] In 1887 and 1888 Harry Seeley divided dinosaurs into the two orders Saurischia and Ornithischia, based on their hip structure. [2]
The genus must appear on the List of dinosaur genera. At least one named species of the creature must have been found in South America. This list is a complement to Category:Mesozoic dinosaurs of South America.
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