Holotype:

Locality: Canaan Quarry, 1.200 meters north of Barreales Lake Paleontological Center, Barreales Lake, Neuquen Province, Patagonia, Argentina.

Horizon: Portezuelo Formation, Upper Rio Neuquen Subgroup, Middle Neuquen Group.
(was Portezuelo Member, Rio Neuquen Formation.)

Biostratigraphy:

Age: Neuquenian Tetrapoda Assemblage, Upper Turonian or Coniacian Stage, Lower Senonian Subepoch, Lower Gulf Epoch, Early Late Cretaceous.

Material: 3 proximal ends of left femora and 4 right ones, 2 distal ends of left femora and 1 right one, a distal end of humerus, several vertebral centar and fragmentary pieces.
Note: Possibly from 5 individuals.