Staurikosaurus was one of the first dinosaurs and that makes its fossilized remains just as important in understanding the rise of dinosaurs as those of Herrerasaurus and other dinosaurs considered to be the first members of the dinosaur clade. Its long slender limbs appear to have been well equipped for running; forelimbs are missing from the fossil record so we do not know if was good at catching its prey. We do know that its jaw was filled with many serrated and recurved (curved toward the back of the skull) teeth, so it could have caught prey with its mouth rather than with hands. These teeth were also able to slice into its prey. As far as predators of the Late Triassic are concerned, Staurikosaurus was likely a fearsome foe for many smaller reptiles and mammals that it lived with.