Unexpected bite‐force conservatism as a stable performance foundation across mesoeucrocodylian historical diversity

Unexpected bite‐force conservatism as a stable performance foundation across mesoeucrocodylian historical diversity
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意外的咬伤——迫使保守主义成为跨越中真鳄鱼历史多样性的稳定表现基础

DOI:
10.1002/ar.24768
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发表时间:
2021
期刊:
The Anatomical Record
影响因子:
--
通讯作者:
O'Brien, Haley D.
O'Brien, Haley D.
中科院分区:
--
文献类型:
--
作者:
Gignac, Paul M.;Smaers, Jeroen B.;O'Brien, Haley D.

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对历史选择制度的有效解释需要全面的实况评估和受到良好约束的生态形态指标。由于进食和生存之间的直接关系,以及化石记录中头齿类元素的持久性,进食装置经常是此类进化研究的目标。在脊椎动物中,咬合力等行为一直是支系动态评估的核心;然而,在缺乏详细的性能研究的情况下,这种评估可能会错误地识别潜在的选择因素及其作用。在这里,我们结合了一项全分支性能研究的结果和化石包含的、系统发育信息的方法来评估中真核生物进化过程中的咬合力代理。虽然咬合力的变化先前被认为是对不断变化的轮齿选择制度做出反应,但我们发现,在整个支系的历史中,表现代用品与身体大小相关的保守性,表明咬合力潜力的稳定选择。这种停滞表明,饮食生态差异如食草动物和超肉食性的中真核生物保持着类似的咬合力与身体大小的关系,这一模式与脊椎动物咬合力应该因饮食而变化最大的观念形成了鲜明对比。此外,咬合力守恒可能通过为探索新的生态空间提供稳定的性能基础来支持中真核生物的头牙差异。
Effective interpretation of historical selective regimes requires comprehensivein vivoperformance evaluations and well‐constrained ecomorphological proxies. The feeding apparatus is a frequent target of such evolutionary studies due to a direct relationship between feeding and survivorship, and the durability of craniodental elements in the fossil record. Among vertebrates, behaviors such as bite force have been central to evaluation of clade dynamics; yet, in the absence of detailed performance studies, such evaluations can misidentify potential selective factors and their roles. Here, we combine the results of a total‐clade performance study with fossil‐inclusive, phylogenetically informed methods to assess bite‐force proxies throughout mesoeucrocodylian evolution. Although bite‐force shifts were previously thought to respond to changing rostrodental selective regimes, we find body‐size dependent conservation of performance proxies throughout the history of the clade, indicating stabilizing selection for bite‐force potential. Such stasis reveals that mesoeucrocodylians with dietary ecologies as disparate as herbivory and hypercarnivory maintain similar bite‐force‐to‐body‐size relationships, a pattern which contrasts the precept that vertebrate bite forces should vary most strongly by diet. Furthermore, it may signal that bite‐force conservation supported mesoeucrocodylian craniodental disparity by providing a stable performance foundation for the exploration of novel ecomorphospace.
DOI: 10.1038/s41598-017-02161-w
发表时间: 2017-05-17
期刊: Scientific reports
影响因子: 4.6
作者:
Gignac PM;Erickson GM
通讯作者: Erickson GM
DOI: 10.1093/iob/obz006
发表时间: 2019
期刊: Integrative organismal biology (Oxford, England)
影响因子: --
作者:
O'Brien HD;Lynch LM;Vliet KA;Brueggen J;Erickson GM;Gignac PM
通讯作者: Gignac PM
尼罗河鳄鱼 (Crocodilus Niloticus) 更换牙齿的注意事项
DOI: --
发表时间: 2009
期刊:
影响因子: --
作者:
D. Poole
通讯作者: D. Poole
DOI: 10.1093/icb/icw041
发表时间: 2016-09
影响因子: 2.6
作者:
Gignac P;O'Brien H
通讯作者: O'Brien H
DOI: --
发表时间: 1988
期刊: Paleobiology
影响因子: 2.7
作者:
S. Emerson
通讯作者: S. Emerson