This list of dinosaurs is a comprehensive listing of all genera that have ever been considered to be non-avian dinosaurs, but also includes some dinosaurs of disputed status (avian? or non-avian?, where "avian" refers to the clade Avialae), as well as purely vernacular terms. Dinosaurs can be divided into avian dinosaurs (birds) and non-avian dinosaurs, which are all dinosaurs other than birds. Birds were therefore the only dinosaur lineage to survive the Cretaceous–Paleogene extinction event approximately 66 million years ago. The fossil record demonstrates that birds are modern feathered dinosaurs, having evolved from earlier theropods during the Late Jurassic epoch. They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201.3 million years ago their dominance continued throughout the Jurassic and Cretaceous periods. 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. Mounted skeletons of Tyrannosaurus (left) and Apatosaurus (right) at the AMNHĭinosaurs are a diverse group of reptiles of the clade Dinosauria.
0 kommentar(er)
