Microryzomys minutus (Tomes, 1860) . Proc. Zool. Soc. Lond., 1860:215.

TYPE LOCALITY: Ecuador, Chimborazo Prov., probably near Pallatanga .

DISTRIBUTION: Montane forest from N Venezuela, through Colombia, Ecuador and Peru, to WC Bolivia.

SYNONYMS: aurillus, dryas, fulvirostris, humilior.

COMMENTS: Formerly included altissimus as a subspecies by Osgood (1933a), who also treated aurillus, humilior, and fulvirostris as subspecies. No races were deemed diagnosable by Carleton and Musser (1989).