Rondond’s Marmoset

Rondon's Marmoset

The Rondond’s Marmoset (Mico Rondoni), also sometime called the Rondônia Marmoset, is a New World Monkey in the Callitrichidae family of monkeys and can be found in the southwestern Amazon rainforests of Brazil. The Rondond’s Marmoset is the most recent addition to the Marmoset family, as it was officially cataloged in 2010. Prior to the proper classification of the Rondond’s Marmoset, it was included in the population counts for the Emilia’s Marmosets. It is the most threatened species of Marmosets, considered “vulnerable” on the conservation status scale.


The Rondond’s Marmoset can be found in the state of Rondônia, with its primary habitation zone being along the Rio Mamoré, Rio Madeira, Rio Ji-Paraná, and the Serra dos Pacaás Novos areas. Like most Marmosets, they are usually found near the canopy of the rainforest where food is most abundant, but can occasionally be found at ground level when the need for alternative food sources arises.


The diet of the Rondond’s Marmoset consists of both plants and small vertebrates, which makes this species of monkeys omnivorous. Plant exudates are an important part of the diet foe Rondon’s Marmoset, and like other Marmosets, its digestive tract is specially adapted for processing saps and gums from local trees. Chisel-like lower incisors and enlarged cecum are examples of adaptations which allow the Rondond’s Marmosets to gouge gum-producing trees and create a flow of exudates, as well as easily digest them.

Fun Rondond’s Marmoset Facts

  1. The Rondond’s Marmoset is the newest addition to the Marmoset family, and was classified in 2010.
  2. The Rondond’s Marmoset is the most threatened of all the Marmoset species of monkeys.
  3. A full grown Rondond’s Marmoset averages around 12 ounces in weight, and their length excluding their tail averages around 9 inches. Their tail alone averages around one foot in length, or 12 inches.
  4. The Rondond’s Marmoset’s name refers to the famous Amazonian explorer Cândido Rondon.