International Journal of Primatology

, Volume 31, Issue 5, pp 693–714

Rondon’s Marmoset, Mico rondoni sp. n., from Southwestern Brazilian Amazonia

  • Stephen F. Ferrari
  • Leonardo Sena
  • Maria Paula C. Schneider
  • José S. Silva Júnior

DOI: 10.1007/s10764-010-9422-6

Cite this article as:
Ferrari, S.F., Sena, L., Schneider, M.P.C. et al. Int J Primatol (2010) 31: 693. doi:10.1007/s10764-010-9422-6


We describe Rondon’s marmoset (Mico rondoni sp. n.) from the Rio Jamari in the Brazilian state of Rondônia and differentiate the species from other Amazonian marmosets on the basis of morphological, genetic, and zoogeographic characteristics. Mico rondoni sp. n. is a typical bare-eared marmoset of predominantly grayish coloration and unpigmented face and cheiridia, which contrasts clearly with its more brownish and pigmented parapatric congeners Mico melanurus and M. nigriceps. Genetically, the new species is unquestionably distinct from Mico emiliae, with which it had been synonimized previously. The geographic range of the new species is defined as the area delimited by the Mamoré, Madeira, and Jiparaná rivers to the west, north, and east, respectively, and the Serra dos Pacaás Novos, to the south, where it is substituted by Mico melanurus. Depending on its exact limits, this range may cover an area of little more than 100,000 km2. A characteristic of the ecology of Mico rondoni sp. n. is its range-wide sympatry with the similarly sized tamarin Saguinus fuscicollis weddelli, which may be a key factor determining the rarity or absence of the new species from many areas within its geographic range. Its apparent scarcity may make the new species exceptionally vulnerable to the effects of the intense human colonization occurring throughout much of its known range, and provoke cause for concern for its long-term survival.


Brazilian AmazoniaCallitrichidaeconservationMico rondoni sp. n.molecular geneticszoogeography

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Stephen F. Ferrari
    • 1
  • Leonardo Sena
    • 2
  • Maria Paula C. Schneider
    • 3
  • José S. Silva Júnior
    • 4
  1. 1.Department of BiologyUniversidade Federal de SergipeSão CristóvãoBrazil
  2. 2.Department of PathologyUniversidade do Estado do ParáBelémBrazil
  3. 3.Department of GeneticsUniversidade Federal do ParáBelémBrazil
  4. 4.Department of ZoologyMuseu Paraense Emílio GoeldiBelémBrazil