Abstract
Among Dinosauria, Theropoda congregates the biggest land predators that ever livedsuch as the North American Tyrannosaurus rex, the Argentine Giganotosaurus caroliniiand the Brazilian Pycnonemosaurus nevesi. The oldest species of Theropoda datesback to the Neotriassic, approximately 230 million years ago and there's still livingrepresentatives of this clade today, birds. Megaraptora, spec…