期刊
EVOLUTION
卷 76, 期 11, 页码 2724-2738出版社
OXFORD UNIV PRESS
DOI: 10.1111/evo.14614
关键词
Allometry; evolutionary rate; microhabitat; modularity; presacral vertebrae
资金
- U.S. National Science Foundation [PRFB-1611752]
- Peter Buck Postdoctoral Fellowship from the Smithsonian National Museum of Natural History
This study used microCT scans and phylogenetic comparative methods to examine the vertebral shape and evolutionary rates in hundreds of anuran species. The results revealed variation in vertebral shape and higher evolutionary rates in cervical and caudal trunk vertebrae. There was little evidence for selection pressures related to adult or larval ecology affecting vertebral evolution, but body size and microhabitat had significant effects on vertebral shape.
The vertebral column is critical to a vertebrate species' flexibility and skeletal support, making vertebrae a clear target for selection. Anurans (frogs and toads) have a unique, truncated vertebral column that appears constrained to provide axial rigidity for efficient jumping. However, no study has examined how presacral vertebrae shape varies among anuran species at the macroevolutionary scale nor how intrinsic (developmental and phylogenetic) and extrinsic (ecological) factors may have influenced vertebrae shape evolution. We used microCT scans and phylogenetic comparative methods to examine the vertebrae of hundreds of anuran species that vary in body size as well as adult and larval ecology. We found variation in shape and evolutionary rates among anuran vertebrae, dispelling any notion that trunk vertebrae evolve uniformly. We discovered the highest evolutionary rates in the cervical vertebrae and in the more caudal trunk vertebrae. We found little evidence for selection pressures related to adult or larval ecology affecting vertebrae evolution, but we did find body size was highly associated with vertebrae shape and microhabitat (mainly burrowing) affected those allometric relationships. Our results provide an interesting comparison to vertebrae evolution in other clades and a jumping-off point for studies of anuran vertebrae evolution and development.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据