Rondon's Marmoset

Rondon's marmoset is a member of the silvery marmoset (Mico argentatus) group within the genus Mico. Like others in its group, its pelage is generally silvery-gray. It has dark fur on much of its head, forehead and the sides of its face, which contrasts with a whitish patch in the middle of its forehead. The fur on its legs become reddish-brown on its shins and almost black at the ankles. Its tail is mostly black. It averages about 330 grams (12 oz) in weight. Length excluding tail averages about 22 centimetres (8.7 in) and the tail averages about 31 centimetres (12 in).

Exudates are an important part of Rondon's marmoset's diet, and like other marmosets its digestive tract is specially adapted for this purpose. Adaptations include chisel-like lower incisors, which can gouge gum-producing trees to begin a flow of exudate, and an enlarged cecum, which helps digest the exudates.