Oligoryzomys chacoensis

Oligoryzomys chacoensis, also known as the Chacoan colilargo^[2] or Chacoan pygmy rice rat,^[1] is a rodent species from South America. It is found in the Gran Chaco region of southeastern Bolivia, southwestern Brazil, Paraguay, and northeastern Argentina.^[1] Its karyotype has 2n = 58 and FNa = 74.^[3]

Oligoryzomys chacoensis
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Family:	Cricetidae
Subfamily:	Sigmodontinae
Genus:	Oligoryzomys
Species:	O. chacoensis
Binomial name
Oligoryzomys chacoensis (Myers & Carleton, 1981)

It is one of the hosts of the hantavirus serotype Bermejo.