Order Rodentia - Suborder Hystricognathi Author Charles A. Woods text 1993 Smithsonian Institution Press Washington and London Editor Don E. Wilson Editor DeeAnn M. Reeder Mammal Species of the World (2 nd Edition) 771 806 book chapter http://doi.org/10.5281/zenodo.7353083 1-56098-217-9 7353083 Ctenomys haigi Thomas, 1917 . Ann. Mag. Nat. Hist., ser. 9, 3:210 . TYPE LOCALITY: Argentina , Chubut Prov. , El Maitén, 700 m . DISTRIBUTION: Chubut and Rio Negro Prov., Argentina . SYNONYMS: lentulus, maulinus . COMMENTS: Was combined with mendocinus , but Pearson (1984:231) elevated to a species based on its unique karyotype. The chromosome no. is 2n=50.