Article (Scientific journals)
Many-to-one function of cat-like mandibles highlights a continuum of sabre tooth adaptions
Chatar, Narimane; Fischer, Valentin; Tseng, Z. Jack
2022In Proceedings of the Royal Society. B, Biological Sciences, 289 (1988)
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Keywords :
Finite element analysis; biting simulation; Felidae; Nimravidae; mandible biomechanics; Carnivora
Abstract :
[en] Cat-like carnivorans are a textbook example of convergent evolution with distinct morphological differences between taxa with short or elongated upper canines, the latest being often interpreted as an adaptation to bite at large angles and subdue large prey. This interpretation of the sabretooth condition is reinforced by a reduced taxonomic sampling in some studies, often focusing on highly derived taxa or using simplified morphological models. Moreover, most biomechanical analyses focus on biting scenarios at small gapes, ideal for modern carnivora but ill-suited to test for subduction of large prey by sabre-toothed taxa. In this contribution we present the largest 3D collection-based muscle-induced biting simulations on cat like carnivorans by running a total of 1,074 analyses on 17 different taxa at three different biting angles (30°, 60° and 90°) including both morphologies. While our results show a clear adaptation of extreme sabre-toothed taxa to bite at larger angles in terms of stress distribution, other performance variables display surprising similarities between all forms at the different angles tested, highlighting a continuous rather than bipolar spectrum of hunting methods in cat-like carnivorans and demonstrating a wide functional disparity and nuances of the sabretooth condition that cannot simply be characterized by specialized feeding biomechanics.
Disciplines :
Zoology
Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others
Author, co-author :
Chatar, Narimane  ;  Université de Liège - ULiège > Geology
Fischer, Valentin  ;  Université de Liège - ULiège > Département de géologie > Evolution and diversity dynamics lab
Tseng, Z. Jack;  UCB - University of California Berkeley [US] > Department of Integrative Biology > Functional Anatomy and Vertebrate Evolution Laboratory
Language :
English
Title :
Many-to-one function of cat-like mandibles highlights a continuum of sabre tooth adaptions
Publication date :
07 December 2022
Journal title :
Proceedings of the Royal Society. B, Biological Sciences
ISSN :
0962-8452
eISSN :
1471-2954
Publisher :
Royal Society, London, United Kingdom
Volume :
289
Issue :
1988
Peer reviewed :
Peer Reviewed verified by ORBi
Data Set :
Available on ORBi :
since 28 October 2022

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