Guatelli-Steinberg, Debbie, Schwartz, Gary T, O'Hara, Mackie C, Gurian, Kaita, Rychel, Jess, McGraw, W Scott (2022) Molar form, enamel growth, and durophagy in Cercocebus and Lophocebus. American Journal of Biological Anthropology, . ISSN 2692-7691. (KAR id:101588)
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Official URL: https://doi.org/10.1002/ajpa.24592 |
Abstract
Objectives: To test the hypothesis that differences in crown structure, enamel
growth, and crown geometry in Cercocebus and Lophocebus molars covary with differences
in the feeding strategies (habitual vs. fallback durophagy, respectively) of these
two genera. Relative to Lophocebus molars, Cercocebus molars are predicted to possess
features associated with greater fracture resistance and to differ in enamel
growth parameters related to these features.
Materials and Methods: Sample proveniences are as follows: Cercocebus atys molars
are from the Taï Forest, Ivory Coast; Lophocebus albigena molars are from a site north
of Makoua, Republic of Congo; and a Lophocebus atterimus molar is from the Lomako
Forest, Democratic Republic of Congo. For μCT scans on which aspects of molar
form were measured, sample sizes ranged from 5 to 35 for Cercocebus and 3 to
12 for Lophocebus. A subsample of upper molars was physically sectioned to measure
enamel growth variables.
Results: Partly as a function of their larger size, Cercocebus molars had significantly
greater absolute crown strength (ACS) than Lophocebus molars, supporting the
hypothesis. Greater crown heights in Cercocebus are achieved through faster enamel
extension rates. Also supporting the hypothesis, molar flare and proportional occlusal
basin enamel thickness were significantly greater in Cercocebus. Relative enamel
thickness (RET), however, was significantly greater in Lophocebus.
Discussion: If ACS is a better predictor of fracture resistance than RET, then Cercocebus
molars may be more fracture resistant than those of Lophocebus. Greater molar
flare and proportional occlusal basin thickness might also afford Cercocebus molars
greater fracture resistance.
Item Type: | Article |
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Divisions: | Divisions > Division of Human and Social Sciences > School of Anthropology and Conservation |
Funders: | National Science Foundation (https://ror.org/021nxhr62) |
Depositing User: | Mackie O'Hara |
Date Deposited: | 13 Jun 2023 16:14 UTC |
Last Modified: | 13 Jun 2023 16:14 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/101588 (The current URI for this page, for reference purposes) |
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