The Pisanosaurus name means Pisano Lizard. It was named in respect Juan A. Pisano, a well known paleotologist. It was Ischigualasto Formation, La Rioja Province, Argentina. In 1967 Rodolfo Casamiquela. The partially finished skeleton fossils were the only one's found for this species.

The Pisanosaurus was small, 3 feet long.