Rhipidomys austrinus Thomas, 1921 . Ann. Mag. Nat. Hist., ser. 9, 7:183.

TYPE LOCALITY: Argentina, Jujuy Prov., Sierra de Santa Barbara, Sunchai, 1200 m .

DISTRIBUTION: E Andean slopes of SC Bolivia and NW Argentina.

SYNONYMS: collinus .

COMMENTS: Whether this form intergrades with R. leucodactylus, as usually identified (e.g., Mares et al., 1989b), or with R. couesi deserves specimen-based corroboration.