The type locality is La Amarga Arroyo and China Muerta Hill.

Amargasaurus[2] A. cazaui[2] Neuquén[2] Puesto Antigual "Braincase and associated postcranial skeleton.

Ligabueino[2] L. andesi[2] Neuquén[2] Puesto Antigual "A cervical neural arch, a mid to posterior dorsal neural arch, a posterior dorsal centrum, the left femur, left ilium, articulated pubic shafts, and two pedal phalanges.

[5] Indeterminate Neuquén Puesto Antigual "Supraorbital, cervical and caudal vertebrae, dermal armor".

[6][5] Amargasuchus A. minor Neuquén Puesto Antigual A trematochampsid crocodylomorph, found in association with the holotype of Amargasaurus Pterosauria indet.