Original Paper

Journal of Mammalian Evolution

, Volume 21, Issue 3, pp 349-355

Intra and Interspecific Variation in Cranial Morphology on the Southernmost Distributed Cebus (Platyrrhini, Primates) Species

  • Leandro ArístideAffiliated withGrupo de Investigación en Biología Evolutiva (GIBE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos AiresIEGEBA-CONICET Email author 
  • , Ignacio M. SotoAffiliated withLaboratorio de Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos AiresIEGEBA-CONICET
  • , Marta D. MudryAffiliated withGrupo de Investigación en Biología Evolutiva (GIBE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos AiresIEGEBA-CONICET
  • , Mariela NievesAffiliated withGrupo de Investigación en Biología Evolutiva (GIBE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos AiresIEGEBA-CONICET

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Abstract

Capuchin monkeys (Cebus) are one of the genera with the widest distribution among Neotropical primates (New World Monkeys, Platyrrhini), accompanied by an elevated genetic, phenotypic, behavioral, morphological, and ecological diversity, both at the interspecific and population levels. Despite being one of the most studied primate genera, this high diversity has led to a particularly complex and controversial taxonomy. In this contribution, we explored the patterns of skull size and shape variation among the southernmost distributed populations of Cebus using three-dimensional geometric morphometric techniques. Results showed a marked morphological differentiation (in size and shape) between previously recognized species (C. nigritus and southern C. libidinosus), and also among C. libidinosus populations, which were quantitatively related with the geographic distance between them. This pattern supports a differentiation between the northwestern Argentina and southern Bolivia and Paraguay forms. Other taxonomic implications are also discussed.

Keywords

Geometric morphometrics Platyrrhini Cebus Populations