The Theropoda group contains mainly the predatory dinosaurs that lived between the Upper Triassic and the Upper Cretaceous of every continent. They are still extant today, because this group also contains the families of modern birds. The real Theropod-dinosaurs were mostly bipedal and were characterized by their hollow bones and three-toed limbs.
Distribution & Fossil evidence
The earliest members of Theropods lived In South America during the Upper Triassic. Another primitive group is the Herrerasaurids, that already spread towards North America and possible Asia and Southern Africa. Later, in the Cretaceous, the group diversified into numerous genuses that could grow as big as 15 meters in length!
The Theropods were a diverse family and therefore many genera and species are known. Some of the most famous species are Tyrannosaurus, Velociraptor, Spinosaurus and Dilphosaurus.