Black-footed Colilargo – Oligoryzomys nigripes

Oligoryzomys nigripesOlfers, 1818

Accepted name, Mammal Species of the World 2005

Neotype designated, diagnosis emended, and karyotype described (2n = 62, FN = 80) by Myers and Carleton (1981), who regarded Mus tarsonigro Fischer, 1814, as a nomen oblitum; further, they recommended that Mus longitarsus Rengger, 1830, which could apply to either O. microtis or O. nigripes, be considered a nomen dubium. Distributional extent complex; in SE Brazil, predominantly a sylvan animal whose range may penetrate drier Cerrado and Caatinga biomes along riparian forests (Bonvicino and Weksler, 1998); also found on offshore island, Ilha Grande, Rio de Janeiro (Pereira et al., 2001). Pattern of microgeographic variation in craniodental variables evaluated in E Paraná, Brazil (as Oryzomys nigripes), by Santos (1997). Relationship to forms such as delticola, eliurus, and longicaudatus warrants additional investigation (also see comments under O. delticola).

• Wilson, D and Reeder, D. (eds.) 2005. Mammal Species of the World. A Taxonomic and Geographic Reference. 3rd ed. -- 2142 pp. Johns Hopkins University Press.