Akodon kempi (Thomas, 1917) . Ann. Mag. Nat. Hist., ser. 8, 20:99.

TYPE LOCALITY: Argentina, Buenos Aires Prov., Rio Parana, Isla Ella, 1 m .

DISTRIBUTION: EC Argentina and adjacent Uruguay.

SYNONYMS: langguthi.

COMMENTS: Type species of Deltamys, usually treated as a subgenus of Akodon (e.g., Cabrera, 1961; Reig, 1987), although Massoia (1980b) accorded the taxon generic status.