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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.
List of Asian dinosaurs; List of Australian and Antarctic dinosaurs; List of dinosaurs and other Mesozoic reptiles of New Zealand; List of European dinosaurs; List of Indian and Madagascan dinosaurs; List of North American dinosaurs. List of Appalachian dinosaurs; List of archosaurs of the Chinle Formation; List of dinosaurs of the Morrison ...
This list of nicknamed dinosaur fossils is a list of fossil non-avian dinosaur specimens given informal names or nicknames, in addition to their institutional catalogue numbers. It excludes informal appellations that are purely descriptive (e.g., "the Fighting Dinosaurs", "the Trachodon Mummy").
The following outline is provided as an overview of and topical guide to dinosaurs: . Dinosaurs – diverse group of animals of the clade and superorder Dinosauria.They were the dominant terrestrial vertebrates for over 160 million years, from the late Triassic period (about in 1963) until the end of the Cretaceous (2000), when the Cretaceous–Paleogene extinction event led to the extinction ...
Name Year Formation Location Notes Images Abelisaurus: 1985 Anacleto Formation (Late Cretaceous, Campanian) Argentina: Only known from a single partial skull Achillesaurus: 2007 Bajo de la Carpa Formation (Late Cretaceous, Santonian) Argentina: Potentially a junior synonym of Alvarezsaurus [1] Adamantisaurus: 2006
Evidence suggests that all dinosaurs were egg-laying, and that nest-building was a trait shared by many dinosaurs, both avian and non-avian. While dinosaurs were ancestrally bipedal, many extinct groups included quadrupedal species, and some were able to shift between these stances.
Chicxulub Crater is an ancient impact crater buried underneath the Yucatán Peninsula, with its center located near the town of Chicxulub, Yucatán, Mexico.The crater is over 180 kilometers (110 mi) in diameter, making the feature one of the largest confirmed impact structures in the world; the asteroid or comet whose impact formed the crater was at least 10 km (6 mi) in diameter.
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
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