Riojasaurus

Riojasaurus (meaning "lizard from La Rioja") was a herbivorous sauropodomorph dinosaur named after La Rioja Province in Argentina where it was found in the Los Colorados Formation in the Ischigualasto-Villa Unión Basin by José Bonaparte. It lived during the Late Triassic (Norian stage) and grew to about long. Riojasaurus is the only known riojasaurid to live in South America.

== Discovery and naming == Riojasaurus incertus was named by Bonaparte (1969) and was based on the holotype specimen, PVL 3808, which was discovered in 1966 and consists of a postcranial skeleton which lacks the skull and mandibles, but preserves 6 presacral vertebrae, diverse caudals, both scapulae, the ischia, and the bones of the hand. In total, at least twenty specimens have been assigned to R. incertus, and the first cranial material of R. incertus was discovered in 1987 and described in 1995.