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Primates

, Volume 29, Issue 2, pp 245–254 | Cite as

Numerical analysis of sexual dimorphism inSaguinus dentition

  • Tsunehiko Hanihara
  • Masahito Natori
Article

Abstract

Among New World monkeys, more or less sexual dimorphism exists in the dentition, especially in the Cebidae. On the other hand, the Callitrichidae includingSaguinus are said to be characterized by a broad lack of sexual dimorphism with the exception of the reproductive organs.

In the present article, sexual dimorphism in the dentition of someSaguinus species was reconfirmed using univariate and multivariate analytical methods. The results of the analysis were as follows: (1) there is no sexual dimorphism in the canine tooth size, except for the upper canine ofS. geoffroyi and lower canine ofS. mystax; (2) the overall tooth size difference between males and females is slight or none inS. geoffroyi, S. leucopus, andS. fuscicollis, relatively small inS. oedipus andS. mystax, and rather larger inS. midas; (3) an overall difference in shape factor between both sexes exists in all species ofSaguinus to a greater or lesser extent; (4) although only slight sexual dimorphism is recognized in the canine tooth itself, sexual dimorphism does exist in some adjacent teeth of the canine in a few species; and (5) there are some interspecific differences in the magnitude of the sexual dimorphism of theSaguinus dentition and these differences are more evident in species inhabiting the peripheral regions of the distribution areas of this genus.

Taking all the evidence obtained into account, the sexual dimorphism in theSaguinus dentition must be re-investigated in comparison with other genera of the Callitrichidae.

Key Words

Saguinus Sexual dimorphism Dentition Numerical analysis Canine 

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Copyright information

© Japan Monkey Centre 1988

Authors and Affiliations

  • Tsunehiko Hanihara
    • 1
  • Masahito Natori
    • 1
  1. 1.Department of AnatomyJichi Medical SchoolTochigiJapan

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