A comparative study of neonatal skeletal development in Cebus and other primates

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E S Watts1

  • 1Department of Anthropology, Tulane University, New Orleans, La.

Folia Primatologica; International Journal of Primatology
|January 1, 1990
PubMed

Insights

Newborn macaques exhibit significantly more advanced skeletal ossification than cebid monkeys, suggesting a unique developmental specialization. This finding challenges assumptions about primate gestation and skeletal maturity at birth.

Area of Science:

  • Primate developmental biology
  • Comparative anatomy
  • Skeletal development

Background:

  • Primate skeletal maturity at birth varies significantly.
  • Understanding these differences is crucial for comparative developmental studies.

Purpose of the Study:

  • To compare skeletal ossification in neonatal cebid monkeys (Cebus albifrons, Cebus apella, Saimiri sciureus boliviensis) with macaques (Macaca mulatta).
  • To investigate the implications of observed ossification differences for primate gestation and organogenesis.

Main Methods:

  • Analysis of hand/wrist radiographs from neonatal primates.
  • Comparison of ossification patterns between cebid monkeys and macaques.

Main Results:

  • Newborn cebid monkeys display considerably less skeletal ossification compared to newborn macaques.
  • Gestation period differences alone do not explain the observed skeletal maturity disparities.
  • Macaques demonstrate skeletal precocity, indicating earlier or faster ossification during gestation.

Conclusions:

  • The advanced ossification in newborn macaques is atypical among anthropoid primates and may represent an ontogenetic specialization.
  • This finding raises questions regarding the timing of organogenesis and gestational comparability between cebid and cercopithecid primates.

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