Calomys musculinus (Thomas, 1913) . Ann. Mag. Nat. Hist., ser. 8, 11:138.

TYPE LOCALITY: Argentina, Jujuy Prov., Maimara, 2230 m .

DISTRIBUTION: N Argentina, E Paraguay.

SYNONYMS: cordovensis, cortensis, murillus.

COMMENTS: Included in C. laucha by Hershkovitz (1962) but morphological and karyotypic evidence supports its specific status (Massoia et al., 1968; Pearson and Patton, 1976). Synonymy follows Contreras and Rosi (1980); Reig (1986) listed murillus as a species.