What is distinctive about this region is the diversity of habitats created by edaphic, topographic and climatic variability.
Pygmy marmosets (Cebuella pygmaea), Goeldi marmosets (Callimico goeldii), pacaranas (Dinomys branickii), and eastern lowland olingos (Bassaricyon alleni) are found here, but not in regions to the east [REF].