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Exploring morphological generality in the Old World monkey postcranium using an ecomorphological framework

Elton, Sarah; Jansson, Anna-Ulla; Meloro, Carlo; Louys, Julien; Plummer, Thomas; Bishop, Laura C.

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Authors

Anna-Ulla Jansson

Carlo Meloro

Julien Louys

Thomas Plummer

Laura C. Bishop



Abstract

Nearly all primates are ecologically dependent on trees, but they are nonetheless found in an enormous range of habitats, from highly xeric environments to dense rainforest. Most primates have a relatively ‘generalised’ skeleton, enabling locomotor flexibility and facilitating other crucial functions, such as manual foraging and grooming. This paper explores the associations between habitat, locomotion and morphology in the forelimbs of cercopithecids (Old World monkeys), contextualising their skeletal ecomorphological patterns with those of other mammals, and complementing functional morphological analyses with phylogenetic comparative techniques. The ecomorphological signals present in the generalised primate postcranium, and how an ancestral arboreal ‘bauplan’ might be modified to incorporate terrestriality or exploit distinct arboreal substrates, are investigated. Analysis of ecomorphological variation in guenons indicates that terrestrial Chlorocebus species retain core elements of a general guenon form, with modifications for terrestriality that vary by species. Adaptation to different modes of arboreality has also occurred in Cercopithecus. The considerable morphological similarity in the guenons sampled emphasises the importance of generality in the primate postcranium – much forelimb variation appears to have emerged stochastically, with a smaller number of traits having a strong functional signal. Analysis of a broader sample of cercopithecids and comparison with felids, suids and bovids indicates that although the cercopithecid humerus has functional morphological signals that enable specimens to be assigned with a reasonable degree of certainty to habitat groups, there is considerable overlap in the specimens assigned to each habitat group. This probably reflects ecological dependence on trees, even in predominantly terrestrial species, as well as the multiple functions of the forelimb and, in some cases, wide geographic distributions that promote intraspecific variation. The use of phylogenetic correction reduced the discriminatory power of the models, indicating that, like allometry, phylogeny contains important ecomorphological information, and should not necessarily be factored out of analyses.

Citation

Elton, S., Jansson, A., Meloro, C., Louys, J., Plummer, T., & Bishop, L. C. (2016). Exploring morphological generality in the Old World monkey postcranium using an ecomorphological framework. Journal of Anatomy, 228(4), 534-560. https://doi.org/10.1111/joa.12428

Journal Article Type Article
Acceptance Date Nov 9, 2015
Online Publication Date Jan 21, 2016
Publication Date Apr 1, 2016
Deposit Date Nov 25, 2015
Publicly Available Date Mar 28, 2024
Journal Journal of Anatomy
Print ISSN 0021-8782
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 228
Issue 4
Pages 534-560
DOI https://doi.org/10.1111/joa.12428
Keywords Arboreality, Bovid, Cercopithecid, Discriminant function analysis, Felid, Habitat, Phylogenetic comparative methods, Suid.

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Accepted Journal Article (1.7 Mb)
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Copyright Statement
This is the accepted version of the following article: Elton, S., Jansson, A.-U., Meloro, C., Louys, J., Plummer, T. and Bishop, L. C. (2016), Exploring morphological generality in the Old World monkey postcranium using an ecomorphological framework. Journal of Anatomy, 228(4): 534-560, which has been published in final form at http://dx.doi.org/10.1111/joa.12428. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.





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