Akodon longipilis (Waterhouse, 1837) . Proc. Zool. Soc. Lond., 1837:16.

TYPE LOCALITY: Chile, Coquimbo Prov., Coquimbo .

DISTRIBUTION: C to S Chile and Argentina.

SYNONYMS: angustus, apta, brachytarsus, castanea, francei, fusco-ater, hirta, melampus, modestior, moerens, nubila, porcinus, suffusa.

COMMENTS: Type species of Abrothrix, typically ranked as a subgenus of Akodon (Cabrera, 1961; Ellerman, 1941; Reig, 1978, 1987), occasionally as a genus (Gyldenstolpe, 1932), or with Microxus as a synonym (Hershkovitz, 1966c). See Reig (1987) for a review of treatment of Abrothrix and its specific contents. Species closely related to, perhaps conspecific with sanborni (see Osgood, 1943; Pine et al., 1979); also see A. lanosus . Pearson (1984) assigned Chelemys angustus to synonymy with A. longipilis; other synonyms follow Osgood (1943).