Order Rodentia - Family Ctenomyidae Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2 1560 1570 book chapter 0-8018-8221-4 10.5281/zenodo.7316535 Ctenomys occultus Thomas 1920 Ctenomys occultus Thomas 1920 , Ann. Mag. Nat. Hist., ser. 9, 6: 243 . Type Locality: Argentina , Monteagudo, 80 km SE Tucumán City. Vernacular Names: Furtive Tuco-tuco . Distribution: NW Argentina in Tucumán and adjacent Provs. Conservation: IUCN – Lower Risk (lc). Discussion: Revised by Reig et al. (1966) ; also see Cabrera (1961) who included it in mendocinus . Karyotype is 2n=22; FN=38 ( Reig et al., 1992 ).