Discussion
Sigmodontine rodents occur only in the Americas, and are
represented by approximately 71 genera and 373 species (D'Elía,
2003; Musser and Carleton, 2005). Among them, 16 species of
Oryzomyini are distributed in Argentina. S. angouya is widely
distributed in northeastern Argentina, eastern Paraguay and
southeastern Brazil (Cirignoli et al., 2005; Percequillo et al.,