Genus: Rinconsaurus CALVO & GONZALEZ-RIGA, 2003
Etymology : In reference to Rincon de los Sauces (Neuquen Province, Argentina) where the specimen was found and Greek, sauros, lizard.
= Nova SALGADO, CALVO & COIRA, 1997

Species: caudamirus CALVO & GONZALEZ-RIGA, 2003
Etymology: Latin, cauda, "tail" and Latin, mirus, "astonishing, amazing," in reference to the unusual morphology of posterior caudal vertebrae; freely ‘the dinosaur from Rincon with amazing tail’.
= Genus: Nova GONAZALEZ RIGA & CALVO, 2001

Holotype: MRS-Pv 26

Locality: Canadon Rio Seco site, 2 km north of Rincon de los Sauces, Neuquen Province, Patagonia, Argentina.

Horizon: Rio Neuquen Formation, Neuquen Group.

Biostratigraphy:

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

Material: 13 articulated anterior-middle and middle-posterior caudal vertebrae and 2 ilia.

Paratypes:

MRS-Pv 117, 263: Teeth.

MRS-Pv 102: Prefrontal.

MRS-Pv 112: Angular and surangular.

MRS-Pv 2, 3, 8, 4, 21: Cervical vertebrae.

MRS-Pv 5, 6, 9, 11, 13, 16-19: Dorsal vertebrae.

MRS-Pv 22-25, 27: Anterior caudal vertebrae.

MRS-Pv 27, 28, 31: Middle caudal vertebrae.

MRS-Pv 29, 30, 32-40: Posterior caudal vertebrae.

MRS-Pv 20, 42, 93, 99, 109, 113: Haemal arches.

MRS-Pv 43: Scapula and coracoid.

MRS-Pv 46, 103, 104: Sternal plates.

MRS-Pv 47: Humerus.

MRS-Pv 98: Metacarpals.

MRS-Pv 94, 101: Ischia.

MRS-Pv 96: Ilia.

MRS-Pv 97, 100: Pubes.

MRS-Pv 49, 92: Femora.

MRS-Pv 111: Metatarsal.