Oligoryzomys chacoensis Myers and Carleton 1981

Oligoryzomys chacoensis Myers and Carleton 1981, Misc. Publ. Mus . Zool., Univ. Michigan, 161: 19.

Type Locality: Paraguay, Boquerón Dept., km 419 along Trans Chaco Hwy, northwest of Villa Hayes.

Vernacular Names: Chacoan Colilargo.

Distribution: Dryer habitats of SE Bolivia, W Paraguay, SW Brazil, and N Argentina.

Conservation: IUCN – Lower Risk (lc).

Discussion: Karyotype reported by Myers and Carleton (1981); morphometric variation by Myers and Carleton (1981) and Olds and Anderson (1987). Status with regard to O. andinus questioned by Carleton and Musser (1989), but genetic data underscore the specific distinctiveness of the two (Myers et al., 1995).