[2] 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.

[2] Despite being able to tolerate habitat disturbance, Rondon's marmoset may be the most threatened species in the genus Mico.

[2] Another callitrichid, Weddell's saddleback tamarin (Leontocebus weddelli) also occurs over much of Rondon's marmoset's range.

[2] However, Rondon's marmoset is rare or absent from areas where Weddell's saddleback tamarin is common.

[2] Weddell's saddleback tamarin is known to take over Rondon's marmoset's gum feeding sites.