Ctenomys sylvanus Thomas 1919
Ctenomys sylvanus Thomas 1919, Ann. Mag. Nat. Hist., ser. 9, 4: 155.
Type Locality: Argentina, Salta Prov., Tartagal.
Vernacular Names: Forest Tuco-tuco.
Subspecies::
Subspecies Ctenomys sylvanus subsp. sylvanus Thomas 1919
Subspecies Ctenomys sylvanus subsp. utibilis Thomas 1920
Distribution: SE Jujuy Prov. and Salta Prov. (NW Argentina).
Discussion: Considered a synonym of frater by Woods (1993) without comment but listed as a distinct species by Galliari et al. (1996).