Oryzomys macconnelli Thomas, 1910 . Ann. Mag. Nat. Hist., ser. 8, 6:186.

TYPE LOCALITY: Guyana, Demerara Dist., Rio Supinaam, a tributary of the Lower Essequibo .

DISTRIBUTION: Lowlands of SC Colombia, E Ecuador and Peru, east to S Venezuela, Guianas, and N Brazil.

SYNONYMS: incertus (of J. A. Allen, 1913), mureliae.

COMMENTS: Included in O. capito by Hershkovitz (1960) but retained as species by Cabrera (1961). Morphological and karyotypic basis for species recognition reinforced by Pine (1973b), Gardner and Patton (1976), and Husson (1978) (see comments under O. intermedius).