Ctenomys sociabilis Pearson and Christie, 1985 . Hist. Nat. (Argentina), 5:338.

TYPE LOCALITY: Argentina, Prov. Neuquén, 2 km W Cerro Puntudo, Estancia Fortin Chacabuco (1075 m) .

DISTRIBUTION: In region of Reserva Nacional del Parque Nacional Nahuel Huapi, Neuquén Prov., Argentina.

COMMENTS: The chromosome no. is 2n=56.