, Volume 37, Issue 4, pp 399–409 | Cite as

Distribution and deployment ofPresbytis melalophos group in Sumatera, Indonesia

  • Mitsuru Aimi
  • Amsir Bakar


Pelage color and pattern, facial markings, cranial morphology, and vocalization have been studied comparatively in thePresbytis melalophos group in Sumatera. Pelage coloration of fetuses and neonates were described forP. melalophos andP. femoralis. Based on this study, three species —P. thomasi, P. melalophos, andP. femoralis — are recognized. Using field data that have been gathered since 1981, the distribution of these three species has been mapped. The resultant map reveals that no sympatry is known and that rivers form the interspecific boundaries. However, rivers apparently are not barriers to the dispersal of species in this group. Instead, distributions appear to be limited ecologically, by competitive exclusion. Historically, it appears that the ancestral stock initially dispersed throughout this area, then theP. melalophos stock split from theP. thomasi-P. femoralis stock, theP. thomasi stock split from theP. femoralis stock, and, finally, theP. femoralis stock dispersed to eastern Sumatera. It appears unlikely that the centrifugal speciation hypothesis based on the principle of metachromism applies to deployment of theP. melalophos group.

Key Words

Presbytis melalophos Presbytis femoralis Presbytis thomasi Distribution Sumatera Metachromism Neonate pelage coloration 


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Copyright information

© Japan Monkey Centre 1996

Authors and Affiliations

  • Mitsuru Aimi
    • 1
  • Amsir Bakar
    • 2
  1. 1.Primate Research InstituteKyoto UniversityAichiJapan
  2. 2.FMIPA, Andalas University, LimaumanisPadangIndonesia

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