Auliscomys micropus (Waterhouse, 1837) . Proc. Zool. Soc. Lond., 1837:17.

TYPE LOCALITY: Argentina, Santa Cruz Prov., "interior plains of Patagonia" at 50°S latitude, near the Rio Santa Cruz (probably near La Argentina fide Hershkovitz, 1962:392) .

DISTRIBUTION: S Andes of Chile and Argentina, from about 38°S latitude to Straits of Magellan.

SYNONYMS: alsus,fumipes.

COMMENTS: Type species of Osgood's (1947) subgenus Loxodontomys and revised in this context by Pearson (1958). Banded karyotype published by Spotorno and Walker (1979); transferred to Auliscomys by Simonetti and Spotorno (1980).