Genus: Tehuelchesaurus RICH, VICKERS-RICH, GIMENEZ, CUENO, PUERTA & VACCA, 1999
Etymology: In honor of the Tehuelche Indians, who long inhabited the area where this dinosaur was found and Greek, sauros, "lizard": Tehuelche lizard.
= Genus: Nova GIMENEZ, 1996

Species: benitezii RICH, VICKERS-RICH, GIMENEZ, CUENO, PUERTA & VACCA, 1999
Etymology: In honor of Sr. Aldino Benitez, who discovered the holotype.

Holotype: MPEF-PV 1125

Locality: 43°10;3”S, 69°15’00W (World Geodetic System, 1984), Fernandez Estancia, Chubut Province, Patagonia, Argentina.

Horizon: Canadon Asfalto Formation.

Biostratigraphy:

Age: Possibly Callovian Stage, Upper Dogger Epoch, Middle Jurassic.

Material: Right scapulocaracoid, left humerus, left radius, left ulna, left and right femora, left ischium, distal part of right ischium, left pubis, partial right pubis, partial ilium, 10 partial dorsal vertebrae, at least 2 partial sacral vertebrae, 1 caudal vertebra, dorsal rib fragments and skin impressions.