Holotype:
Locality: Sierra de Mogna mountains 60 km North of the City of San Juan, San Juan Province, Argentina.
Horizon: Canon del Colorado Formation.
Biostratigraphy:
Age: Late Triassic or Early Jurassic.
Material:
A large specimen: Posterior skull, axis, disarticulated vertebrae and the complete articulated left hind limb including foot with all digits and claws.
A juvenile specimen: Posterior axial skeleton, sacral and caudal vertebrae,
fully articulated pelvic girdle, and both hind limbs, complete and articulated.