Abstract
The Amazon region stands as the largest and the most diverse tropical forest os the world (Mittermier et al., 1992, 1997). Such diversity refers specially to the rodents and the marsupials that make up the the most diverse neotropical mammalian group (Fonseca, 1996; Costa et al., 2005; Plagia et al., 2012) with 107 species recognized to date, where 91 are endemic of this biome (Plagia et …