Ctenomys opimus Wagner, 1848 . Arch. Naturg., 1:75.

TYPE LOCALITY: Bolivia, Oruro Dept., Sajama .

DISTRIBUTION: N.W. Argentina; S.W. Bolivia; S. Peru; N. Chile.

COMMENT: May be conspecific with fulvus; opimus and fulvus cannot be separated on the basis of karyotypes; see Gallardo, 1979, Arch. Biol. Med. Exp., 12:80.

ISIS NUMBER: 5301410027001016001.