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Birds were therefore the only dinosaur lineage to survive the Cretaceous–Paleogene extinction event approximately 66 million years ago. Dinosaurs can be divided into avian dinosaurs (birds) and non-avian dinosaurs, which are all dinosaurs other than birds. Birds are feathered theropod dinosaurs and constitute the only known living dinosaurs.
A 2016 estimate put the number of dinosaur species living in the Mesozoic at 1,543–2,468, [24] [25] compared to the number of modern-day birds (avian dinosaurs) at 10,806 species. [ 26 ] Extinct dinosaurs, as well as modern birds, include genera that are herbivorous and others carnivorous, including seed-eaters, fish-eaters, insectivores, and ...
List of dinosaur genera; List of informally named dinosaurs; List of dinosaur species on display; Lists of dinosaur specimens; List of non-avian dinosaur species preserved with evidence of feathers; List of fictional dinosaurs
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]
Known from over a thousand specimens, making it one of the most well-known early dinosaurs. Some referred species may belong to their own genera Coelurus: 1879 Morrison Formation (Late Jurassic, Kimmeridgian) United States ( Wyoming) Potentially an early member of the tyrannosauroid lineage [24] Colepiocephale: 2003
The new findings address a 30-million-year gap in our knowledge of dinosaur evolution during the first part of the Late Triassic period. “The research material was collected over 25 years.
More than 260 dinosaur footprints discovered in Brazil and Cameroon provide further evidence that South America and Africa were once connected as part of a giant continent millions of years ago.
From roughly 230-200 million years ago, during the Late Triassic and into the early Jurassic periods, dinosaurs emerged from just one of many reptilian species to become the dominant species on Earth.