Locality: La Invernada fossil area, northeast Neuquen Province, northern Patagonia, Argentina.

Horizon: Bajo de la Carpa  Formation.

Biostratigraphy:

Age: Santonian Stage, Lower Senonian Subepoch, Gulf Epoch, Late Early to Early Middle Cretaceous.

Material:

MAU-Pv-LI-665: Mid cervical vertebra, 2 anterior dorsal vertebrae, and cervical and dorsal ribs.