Oryzomys keaysi J. A. Allen, 1900 . Bull. Am. Mus. Nat. Hist., 13:225.

TYPE LOCALITY: Peru, Puno Dept., valley of upper Rio Inambari, Inca Mines, 6000 ft .

DISTRIBUTION: Montane rainforest of E Peruvian Andes.

COMMENTS: A subspecies of O. albigularis sensu Cabrera (1961) . Genetically divergent from O. albigularis and O. levipes; contiguously allopatric to the latter (see Patton et al., 1990).