Cranial growth and growth dimorphism in Ateles geoffroyi

B. D. Corner, J. T. Richtsmeier

Research output: Contribution to journalArticle

Abstract

With the exception of the work of Schultz (1960), cranial growth in Ateles is not well documented. This paper describes the results of a detailed quantitative study of cranial ontogeny in male and female Ateles geoffroyi. Using Euclidean Distance Matrix Analysis (EDMA), local areas of form change due to growth within spider monkey crania are identified. We found substantial change local to the zygomatic region in the face, identified mediolaterally directed changes in the palate, detected relatively larger amounts of change local to the anterior neurocranium compared to the posterior neurocranium, and demonstrate a greater amount of basicranial growth along a mediolateral axis than previously reported. Cranial sexual dimorphism is also examined. A. geoffroyi is noted for being monomorphic, and we found a general similarity between male and female cranial forms at all developmental ages. However, differences in overall cranial size between the sexes were found in the oldest subadult age group but not between male and female adults. This difference suggests that A. geoffroyi females attain their adult cranial form slightly before males and implies a pattern of earlier onset of female maturity relative to males.

Original languageEnglish (US)
Pages (from-to)371-394
Number of pages24
JournalAmerican Journal of Physical Anthropology
Volume92
Issue number3
DOIs
StatePublished - 1993

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Atelinae
dimorphism
Growth
maturity
age group
Ateles
palate
Palate
Skull
Sex Characteristics
sexual dimorphism
monkeys
Araneae
ontogeny
Age Groups
Ateles geoffroyi
gender

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Anthropology

Cite this

Cranial growth and growth dimorphism in Ateles geoffroyi. / Corner, B. D.; Richtsmeier, J. T.

In: American Journal of Physical Anthropology, Vol. 92, No. 3, 1993, p. 371-394.

Research output: Contribution to journalArticle

Corner, B. D. ; Richtsmeier, J. T. / Cranial growth and growth dimorphism in Ateles geoffroyi. In: American Journal of Physical Anthropology. 1993 ; Vol. 92, No. 3. pp. 371-394.
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