A “Frenguelli lizard” from Late Triassic Argentina. Named in honor of Dr. Joaquin Frenguelli (1883-1958), an Italian-born paleontologist who worked in Argentina and who did important paleontological and geological work in the Triassic basin of the Ischigualasto-Villa Union. This fossil is also referred to as Herrerasaurus. Named by Argentinian paleontologist Fernando E. Novas in 1986.