"Ischigualasto Formation Victorino Herrera's Lizard"
Length: 5m (16.4ft)
Weight: 250kg (551lbs.)
Location: San Juan, Argentina
Era: Ladinian age, middle Triassic (231 million years ago)
Typically described in less technical literature as the possible progenitor of the Theropod lineage (or at least very close), Herrerasaurus and its relatives have an unusual collection of derived features (most notably its unusual hands and pelvis) that indicate it was likely part of an early dinosaur radiation that ultimately died off quite early on.
Ischisaurus cattoi Reig, 1963
Frenguellisaurus ischigualastensis Novas, 1986