Order Rodentia (Part 6) Author James H. Honacki Author Kenneth E. Kinman Author James W. Koeppl text 1982 Alien Press, Inc. & The Association of Systematics Collections Lawrence, Kansas, USA Editor James H. Honacki Editor Kenneth E. Kinman Editor James W. Koeppl Mammal Species of the World (1 st Edition) 560 594 book chapter http://doi.org/10.5281/zenodo.7353039 0-89327-235-3 7353039 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.