Genus: Alnashetri MAKOVICKY, APESTEGUIA & GIANECHINI, 2012
Etymology: Alnashetri, meaning "slender thighs" in the Gunun-a-kunna dialect of the Tehuelchan language, in reference to long and slender hind limbs of the holotype.

Species: cerropoliciensis MAKOVICKY, APESTEGUIA & GIANECHINI, 2012
Etymology: In reference of the nearby hamlet of Cerro Policia, Rio Negro Province, Northwest Patagonia, Argentina, whose residents have generously assisted fieldwork efforts at La Buitrera sine the locality was discovered by teh second author in 1999.

Holotype: MPCA-477

Locality: Hoyada de los esfendontes" sublocality, part of the main fossiliferous locaity of La Buitrera, about 30 km south of the village of El Chocon, Rio Negro Province, Northwest Patagonia, Argentina.

Horizon: Candeleros Formation.

Biostratigraphy:

Age: 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: Partil left femur, distal portions of left and right tibiae, fright fibula, proximal tarsals of both ankles, a nearly complete right metatarsus, proximal and distal parts of the left metapodials, left pedial digit III.

Referred material:

MAKOVICKY, APESTEGUIA, & GIANECHINI, 2016

Locality: Near Cerro Policia, Rio Negro Province, Argentina.

Horizon: Candeleros Formation.

Biostratigraphy:

Age: 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:

Number: Not given: Nearly complete specimen missiong only major sections of the tail.