Thylamys pallidior (Thomas, 1902) . Ann. Mag. Nat. Hist., ser. 7, 10:161.

TYPE LOCALITY: Bolivia, Oruro, "Challapata."

DISTRIBUTION: Argentina and E and S Bolivia.

SYNONYMS: bruchi Thomas, 1921; fenestrae Marelli, 1932; pulchella Cabrera, 1934.