Ctenomys tuconax Thomas, 1925 . Ann. Mag. Nat. Hist., ser. 9, 15:583.

TYPE LOCALITY: Argentina, Tucumân Prov., Concepcion, 500 m .

DISTRIBUTION: East of the mountains to 3,000 m in Tucumân Prov. (NW Argentina).

COMMENTS: The chromosome no. is 2n=58-61.