Genus: Mapusaurus CORIA & CURRIE, 2006
= Genus: Nova CORIA & CURRIE, 1997
Etymology: "Mapu" is a Mapuche (local indienous people) term for Earth, and Greek, sauros, 'lizard'; "Earth Reptile".

Species: roseae CORIA & CURRIE, 2006
Etymology: In reference to the rose colored rocks that surround the site were the specimen was found, and to Rose Letwin (Seattle) who sponsored the expeitions in 1999, 2000, 2001.

Locality: From a Bonebed, Canadon del Gato in the Cortaderas area, 20 km southwest of Plaza Huincul, Neuquen Province, Argentina.

Horizon: Huincul Formation, Middle Rio Limay Subgroup, Lower Neuquen Group.
(Was Huincul Member, Rio Limay Formation).

Biostratigraphy:

Age: Limayan Tetrapoda Assemblage, Cenomanian Stage, Uppermiddle Gallic Subepoch, Lowermost Gulf Epoch, Late Early or Middle Cretaceous-Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Early Late Cretaceous.

Material:

Paratypes:

MCF-PVPH-108.116: Furcula.