Ctenomys tucumanus Thomas, 1900 . Ann. Mag. Nat. Hist., ser. 7, 6:301.

TYPE LOCALITY: Argentina, Tucumân Prov., 450 m .

DISTRIBUTION: NW Argentina.

COMMENTS: The chromosome no. is 2n=28. Considered distinct from mendocinus by Roig and Reig (1969:670).