Akodon nigrita (Lichtenstein, 1829) . Darst. Säugeth., 7:pl. 35, fig. 1.

TYPE LOCALITY: Brazil, vicinity of Rio de Janeiro .

DISTRIBUTION: SE Brazil, E Paraguay, and NE Argentina.

SYNONYMS: fuliginosus, henseli, orycter, subterraneus .

COMMENTS: Member of Thaptomys, usually segregated as a subgenus of Akodon (Cabrera, 1961; Massoia, 1963a) though Reig (1978, 1987) considered Thaptomys a full synonym of Akodon sensu stricto. Includes subterraneus, the type of Thaptomys (see Massoia, 1963a).