Dental arch form in the cercopithecidae |
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Authors: | Joseph R Siebert Daris R Swindler John D Lloyd |
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Institution: | (1) Present address: Department of Laboratories, The Children's Orthopedic Hospital and Medical Center, P. O. Box C-5371, 98105 Seattle, Washington, U.S.A.;(2) Present address: Department of Anthropology, DH-05, University of Washington, 98195 Seattle, Washington, U.S.A. |
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Abstract: | The dental arches of the major genera of Old World monkeys (superfamily Cercopithecoidea) were studied by morphometric techniques.
Bicanine and bimolar breadths and arch lengths were ascertained for maxillary and mandibular arches. This data was then subjected
to a variety of statistical tests. Corresponding arch dimensions of the upper and lower dentition showed the highest correlations,
while the lowest correlations were generally observed between comparisons of arch dimensions and body size. A new expression
was developed, relative male palate size (RMPS), which quantified the degree of sexual dimorphism while correcting for body
size. The four hierarchies examined using RMPS values were sexual dimorphism, modes of sexual selection and predator defense
and diet. Maxillary bicanine breadth was the only parameter that exhibited sexual dimorphism consistently in each of the four
hierarchies, although differences in arch size were identified for diet and predator defense. Species grouped by predator
defense showed the most sexual dimorphism in arch parameters. |
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Keywords: | |
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