Akodon xanthorhinus (Waterhouse, 1837) . Proc. Zool. Soc. Lond., 1837:17.

TYPE LOCALITY: Chile, Magallanes Prov., Isla Hoste, Hardy Peninsula .

DISTRIBUTION: Extreme S Chile and Argentina, including Tierra del Fuego.

SYNONYMS: canescens, Hanoi .

COMMENTS: Subgeneric allocation questionable: a member of Akodon following Patterson et al. (1984) or Abrothrix according to Reig (1987). Type locality, synonymy, distribution, and karyotype discussed by Patterson et al. (1984), who judged the form infans, synonymized under A. xanthorhinus by Osgood (1943), as a nomen dubium and considered Hanoi, described by Pine (1976), as a subjective synonym. Genetically highly differentiated from typical Akodon (see Apfelbaum and Reig, 1989).