International Journal of Primatology

, Volume 34, Issue 5, pp 1055–1076 | Cite as

Diversity, Geographic Distribution and Conservation of Squirrel Monkeys, Saimiri (Primates, Cebidae), in the Floodplain Forests of Central Amazon

  • Fernanda Pozzan Paim
  • José de Sousa e Silva Júnior
  • João Valsecchi
  • Maria Lúcia Harada
  • Helder Lima de Queiroz
Article

Abstract

Eleven taxa of primates are found in the floodplains of the western portion of the central Brazilian Amazon, protected in part by the Mamirauá Sustainable Development Reserve. The taxonomy of the squirrel monkeys, the number of taxa, and their geographic distributions are still poorly understood. Here we investigate differentiation among the taxa of this genus in Mamirauá, examining their morphology and geographic distribution. We registered 333 points of occurrence of squirrel monkeys and examined 117 specimens deposited in scientific collections. The results of the morphological analyses were generally in good agreement with field observations. Together they indicate the existence of three taxa: Saimiri vanzolinii, Saimiri sciureus macrodon, and S. s. cassiquiarensis. The restricted range of Saimiri vanzolinii in the southeastern portion of the reserve covers an area of 870 km2, and it is among the smallest of the distribution areas for any Neotropical primate species. Saimiri sciureus cassiquiarensis has a disjunct distribution, crossing the Japurá River to the right bank into the reserve in two places, and S. s. macrodon is the squirrel monkey ranging widely in the northwest of Mamirauá. There are three areas of parapatry: one between Saimiri vanzolinii and Saimiri sciureus macrodon and two between S. vanzolinii and S. s. cassiquiarensis. We recommend that anthropogenic changes in the region be monitored, and conservation measures be taken to protect these primates, especially considering the endemism and very restricted range of Saimiri vanzolinii and its consequent vulnerability to extinction.

Keywords

Biogeography Endemism Morphology Taxonomy 

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Fernanda Pozzan Paim
    • 1
  • José de Sousa e Silva Júnior
    • 2
  • João Valsecchi
    • 1
  • Maria Lúcia Harada
    • 3
  • Helder Lima de Queiroz
    • 1
  1. 1.Instituto de Desenvolvimento Sustentável MamirauáTeféBrasil
  2. 2.Museu Paraense Emílio GoeldiBelémBrasil
  3. 3.Universidade Federal do ParáBelémBrasil

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