Ontogenetic changes in jaw leverage and skull shape in tufted and untufted capuchins

Author:

Holmes Megan A.1ORCID,Terhune Claire E.2,Chalk‐Wilayto Janine3,Yoakum Caitlin B.4,Taylor Parker2,Ramirez Rocio5,Solís Megan P.6,Polvadore Taylor A.2ORCID,Ross Callum F.7,Taylor Andrea B.8,Fogaca Mariana Dutra9,Laird Myra F.10ORCID

Affiliation:

1. Department of Family Medicine and Community Health Duke University School of Medicine Durham North Carolina USA

2. Department of Anthropology University of Arkansas Fayetteville North Carolina USA

3. Department of Biomedical Sciences Mercer University School of Medicine Savannah Georgia USA

4. Department of Anatomy Arkansas College of Health Education Fort Smith Arkansas USA

5. Department of Integrative Anatomical Sciences University of Southern California Los Angeles California USA

6. Department of Anthropology Stony Brook University Stony Brook New York USA

7. Department of Organismal Biology and Anatomy University of Chicago Chicago Illinois USA

8. Department of Foundational Biomedical Sciences Touro University California Vallejo California USA

9. Neotropical Primates Research Group—NeoPReGo São Paulo Brazil

10. Department of Basic and Translational Sciences University of Pennsylvania Philadelphia Pennsylvania USA

Abstract

AbstractThe ontogeny of feeding is characterized by shifting functional demands concurrent with changes in craniofacial anatomy; relationships between these factors will look different in primates with disparate feeding behaviors during development. This study examines the ontogeny of skull morphology and jaw leverage in tufted (Sapajus) and untufted (Cebus) capuchin monkeys. Unlike Cebus, Sapajus have a mechanically challenging diet and behavioral observations of juvenile Sapajus suggest these foods are exploited early in development. Landmarks were placed on three‐dimensional surface models of an ontogenetic series of Sapajus and Cebus skulls (n = 53) and used to generate shape data and jaw‐leverage estimates across the tooth row for three jaw‐closing muscles (temporalis, masseter, medial pterygoid) as well as a weighted combined estimate. Using geometric morphometric methods, we found that skull shape diverges early and shape is significantly different between Sapajus and Cebus throughout ontogeny. Additionally, jaw leverage varies with age and position on the tooth row and is greater in Sapajus compared to Cebus when calculated at the permanent dentition. We used two‐block partial least squares analyses to identify covariance between skull shape and each of our jaw muscle leverage estimates. Sapajus, but not Cebus, has significant covariance between all leverage estimates at the anterior dentition. Our findings show that Sapajus and Cebus exhibit distinct craniofacial morphologies early in ontogeny and strong covariance between leverage estimates and craniofacial shape in Sapajus. These results are consistent with prior behavioral and comparative work suggesting these differences are a function of selection for exploiting mechanically challenging foods in Sapajus, and further emphasize that these differences appear quite early in ontogeny. This research builds on prior work that has highlighted the importance of understanding ontogeny for interpreting adult morphology.

Funder

National Science Foundation

Publisher

Wiley

Reference101 articles.

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Ontogenetic biomechanics of tufted (Sapajus) and untufted (Cebus) capuchin mandibles;American Journal of Biological Anthropology;2024-07-24

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3