Genus: Malarguesaurus GONZALEZ-RIGA, PREVITERA & PIRRONE, 2009 (published in 2008)
Etymology: In reference to the Malargue Department, Mendoza Province, Argentina, where the specimen was found and Greek, sauros, "lizard."

Species: florenciae GONZALEZ-RIGA, PREVITERA & PIRRONE, 2009 (published in 2008)
Etymology: In honor of Florencia Fernandez Favaron, who collaborated in our field work for years, and found the first fossil remains of this species.

Holotype: IANIGLA-PV 110

Locality: Quebrada Norte Quarry, Paso de las Bardas area, Malargue Department, Mendoza Province, Argentina.

Horizon: Portezuelo Formation, Rio Neuquen subgroup, Neuquen Group.

Biostratigraphy:

Age: Late Turonian Stage, Uppermost Gallic Subepoch to Early Coniacian Stage, Lower Senonian Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material: Proximal, middle and distal caudal vertebrae, chevrons, dorsal ribs, fragment of humerus, an incomplete femur, and several bone fragments.

Referred material:

Locality: Cerro La Torre Site, 600 m south of Quebrada Norte Quarry, Paso de las Bardas area, Mendoza Province, Argentina.

Horizon: Portezuelo Formation, Rio Neuquen subgroup, Neuquen Group.

Biostratigraphy:

Age: Late Turonian Stage, Uppermost Gallic Subepoch to Early Coniacian Stage, Lower Senonian Subepoch, Lower Gulf Epoch, Late Cretaceous.

Material:

IANIGLA-PV 111: 2 distal caudal vertebrae and incomplete fibula.