Holotype:

Locality: Renteria, Rio Negro Province, Argentina.

Horizon: Lower Candeleros Formation, Lower Rio Limay Subgroup, Lower Neuquen Group.

Biostratigraphy:

Age: Limayan Tetrapoda Assemblage, Cenomanian Stage, Uppermiddle Gallic Subepoch, Lowermost Gulf Epoch, Late Early or Middle Cretaceous-Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Early Late Cretaceous.

Material: Fragmentary skulls, mandibles, teeth, and post cranial skeletons of several individuals.