Species: polanskii BONAPARTE, 1966
Etymology:

Holotype: MLP 65-VI-18-1

Locality: "Puesto Viejo" locality, Colonia Las Malvinas, Department of San Rafael, Mendoza Province, Argentina.

Horizon: Rio Seco de la Quebrada Formation (old Puesto Viejo Formation), Puesto Viejo Group.

Biostratigraphy:

Age: Late Anisian Stage/Early Ladinian Stage, Mid Triassic Epoch, Middle Triassic.

Material: Skull, mandibles and fragmentary skeleton.

Referred material:

MLP 65-VI-18-2: Skull, mandibles and fragmentary skeleton.

ABDALA, 2000

PVL 3466: Skull and mandible dorsoventrally crushed and badly preserved.

PVL 4416: Skull and mandibles articulated but remarkably crushed, connected to the first 3 cervical vertebrae.