期刊论文详细信息
PeerJ
Interspecific variation in the limb long bones among modern rhinoceroses—extent and drivers
article
Christophe Mallet1  Raphaël Cornette2  Guillaume Billet3  Alexandra Houssaye1 
[1] Mécanismes adaptatifs et évolution ,(MECADEV), UMR 7179, MNHN, CNRS, Muséum National d’Histoire Naturelle;Institut de Systématique, Evolution, Biodiversité ,(ISYEB), UMR 7205, MNHN, CNRS, SU, EPHE, UA, Muséum National d’Histoire Naturelle;Centre de Recherche en Paléontologie—Paris ,(CR2P), UMR CNRS 7207, MNHN, CNRS, SU, Muséum National d’Histoire Naturelle
关键词: Rhinoceros;    Limb bones;    3D geometric morphometrics;    Morphofunctional anatomy;    Body mass;    Body size;    Graviportality;   
DOI  :  10.7717/peerj.7647
学科分类:社会科学、人文和艺术(综合)
来源: Inra
PDF
【 摘 要 】

Among amniotes, numerous lineages are subject to an evolutionary trend toward body mass and size increases. Large terrestrial species may face important constraints linked to weight bearing, and the limb segments are particularly affected by such constraints due to their role in body support and locomotion. Such groups showing important limb modifications related to high body mass have been called “graviportal.” Often considered graviportal, rhinoceroses are among the heaviest terrestrial mammals and are thus of particular interest to understand the limb modifications related to body mass and size increase. Here, we present a morphofunctional study of the shape variation of the limb long bones among the five living rhinos to understand how the shape may vary between these species in relation with body size, body mass and phylogeny. We used three dimensional geometric morphometrics and comparative analyses to quantify the shape variation. Our results indicate that the five species display important morphological differences depending on the considered bones. The humerus and the femur exhibit noticeable interspecific differences between African and Asiatic rhinos, associated with a significant effect of body mass. The radius and ulna are more strongly correlated with body mass. While the tibia exhibits shape variation both linked with phylogeny and body mass, the fibula displays the greatest intraspecific variation. We highlight three distinct morphotypes of bone shape, which appear in accordance with the phylogeny. The influence of body mass also appears unequally expressed on the different bones. Body mass increase among the five extant species is marked by an increase of the general robustness, more pronounced attachments for muscles and a development of medial parts of the bones. Our study underlines that the morphological features linked to body mass increase are not similar between rhinos and other heavy mammals such as elephants and hippos, suggesting that the weight bearing constraint can lead to different morphological responses.

【 授权许可】

CC BY   

【 预 览 】
附件列表
Files Size Format View
RO202307100009637ZK.pdf 14525KB PDF download
  文献评价指标  
  下载次数:9次 浏览次数:2次