Why ruminating ungulates chew sloppily: Biomechanics discern a phylogenetic pattern
Zupeng Zhou,Daniela E. Winkler,Josep Fortuny,Thomas M. Kaiser,Jordi Marcé-Nogué,Jordi Marcé-Nogué +5 more
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Three-dimensional finite element analysis is used to assess the biomechanical performance of mandibles in eleven ungulate taxa with well-established but distinct dietary preferences and finds that mandibular morphologies reflect the masticatory demands of specific ingesta within the orders Artiodactyla and PerissodactylA.Abstract:
There is considerable debate regarding whether mandibular morphology in ungulates primarily reflects phylogenetic affinities or adaptation to specific diet. In an effort to help resolve this debate, we use three-dimensional finite element analysis (FEA) to assess the biomechanical performance of mandibles in eleven ungulate taxa with well-established but distinct dietary preferences. We found notable differences in the magnitude and the distribution of von Mises stress between Artiodactyla and Perissodactyla, with the latter displaying lower overall stress values. Additionally, within the order Artiodactyla the suborders Ruminantia and Tylopoda showed further distinctive stress patterns. Our data suggest that a strong phylogenetic signal can be detected in biomechanical performance of the ungulate mandible. In general, Perissodactyla have stiffer mandibles than Artiodactyla. This difference is more evident between Perissodactyla and ruminant species. Perissodactyla likely rely more heavily on thoroughly chewing their food upon initial ingestion, which demands higher bite forces and greater stress resistance, while ruminants shift comminution to a later state (rumination) where less mechanical effort is required by the jaw to obtain sufficient disintegration. We therefore suggest that ruminants can afford to chew sloppily regardless of ingesta, while hindgut fermenters cannot. Additionally, our data support a secondary degree of adaptation towards specific diet. We find that mandibular morphologies reflect the masticatory demands of specific ingesta within the orders Artiodactyla and Perissodactyla. Of particular note, stress patterns in the white rhinoceros (C. simum) look more like those of a general grazer than like other rhinoceros' taxa. Similarly, the camelids (Tylopoda) appear to occupy an intermediate position in the stress patterns, which reflects the more ancestral ruminating system of the Tylopoda.read more
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References
More filters
Journal Article
R: A language and environment for statistical computing.
TL;DR: Copyright (©) 1999–2012 R Foundation for Statistical Computing; permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and permission notice are preserved on all copies.
Book
Numerical Taxonomy: The Principles and Practice of Numerical Classification
P.H.A. Sneath,Robert R. Sokal +1 more
Journal ArticleDOI
The elastic and ultimate properties of compact bone tissue
TL;DR: The use of a tranversely isotropic model is tested for the elastic behavior of bovine and human bone and the five independent constants of this model are determined.
Journal ArticleDOI
Modelling bone tissue fracture and healing: a review ☆
TL;DR: The main similarities and differences between normal engineering materials and bone tissue from a structural point of view are demonstrated to demonstrate the importance of computational simulations in biomechanics due to the difficulty of obtaining experimental or clinical results.
Journal ArticleDOI
A Generalized K Statistic for Estimating Phylogenetic Signal from Shape and Other High-Dimensional Multivariate Data
TL;DR: A generalization of the K statistic of Blomberg et al. that is useful for quantifying and evaluating phylogenetic signal in highly dimensional multivariate data is described and the utility of the new approach is illustrated by evaluating the strength of phylogenetics signal for head shape in a lineage of Plethodon salamanders.