Pygmy marmosets (Cebuella pygmaea), Goeldi marmosets (Callimico goeldii), pacaranas (Dinomys branickii), and olingos (Bassaricyon gabbii) are found here, but not in regions to the east.    From Wordnik.com.  [Southwest Amazon moist forests] Reference

Cebuella.    From Wordnik.com.  [Pygmy Albino Marmosets (w pics) | Impact Lab] Reference

Pygmy Marmoset, Cebuella pygmaea.    From Wordnik.com.  [CreationWiki - Recent changes [en]]