Age and Setting: Argentina (Ischigualasto Formation), 231.4 million BC (Carnian stage of the Late Triassic) Animals: Eoraptor lunensis, Eodromaeus murphi, Saurosuchus galilei, Ischigualastia jenseni, Hyperodapedon sanjuanensis, Exaeretodon argentinus, Proterochampsa barrionuevoi, Aetosauroides scagliai, and Herrerasaurus ischigualastensis