Oligoryzomys magellanicus (Bennett, 1836) . Proc. Zool. Soc. Lond., 1835:191 [1836].

TYPE LOCALITY: Chile, Magallanes Prov., Straits of Magellan, Port Famine .

DISTRIBUTION: S Patagonian region of Chile and Argentina, including Tierra del Fuego.

COMMENTS: Karyotypic, morphometric, and phallic differention from O. longicaudatus supports the specific recognition of O. magellanicus (Gallardo and Palma, 1990; Gallardo and Patterson, 1985).