Herrerasauridae A clade in the dinosaur family tree. The entries below are classified within it. Frenguellisaurus 237–227.3 Mya Ischisaurus 237–227.3 Mya Teyuwasu barberenai 237–205.7 Mya Gnathovorax 233.23 Mya · Brazil Staurikosaurus 233.23–228 Mya · Brazil Herrerasaurus 231.4–228.91 Mya · South America Sanjuansaurus 231.4 Mya · Argentina