Ctenomys frater Thomas, 1902 . Ann. Mag. Nat. Hist., ser. 7, 9:185.

TYPE LOCALITY: Argentina, Jujuy Prov., Sunchai .

DISTRIBUTION: Mountains south of Jujuy and in Salta Prov. (Argentina); SW Bolivia at 2,000 - 4,500 m.

STATUS: Uncommon.

SYNONYMS: barbarus, budini, mordosus, sylvanus, utibilis.

COMMENTS: See Cook et al. (1990:1-6). The chromosome no. is 2n=52; FN=78.