Dinosaurs distinguished themselves from other archosaurs in the Late Triassic, and became the dominant land vertebrates of the Jurassic and Cretaceous periods (201.3 to 66 Ma).
Os dinosauros distinguíanse doutros arcosauros no Triásico tardío, e convertéronse nos vertebrados terrestres dominantes dos períodos Xurásico e Cretáceo (desde hai 201,3 a 66 Ma).