Evolutionary and morphological patterns underlying carnivoran body shape diversity

Evolutionary and morphological patterns underlying carnivoran body shape diversity
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食肉动物体形多样性的进化和形态模式

DOI:
10.1111/evo.14143
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发表时间:
2021
期刊:
影响因子:
3.3
通讯作者:
Law, Chris J.
Law, Chris J.
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Law, Chris J.

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体型的多样性是脊椎动物表型变异的最显著特征之一。然而,生物学家仍然缺乏对其多样性的潜在形态成分的充分了解,特别是在哺乳动物等吸热脊椎动物中。在这项研究中,有关头骨和轴向组成部分的进化,有助于食肉动物体型的多样性的假设进行了测试。研究发现,食肉动物体型的进化有三种趋势:(1)食肉动物体型多样,家族进化年龄最能预测家族内的变异;(2)体型受体型大小的异速生长效应驱动,体型越小,体型越长;(3)胸腰椎和肋骨长度对体型变异的贡献最大,尽管不同家族之间的途径不同。这些结果揭示了导致食肉动物体型多样性增加的形态模式,并阐明了支配脊椎动物体型多样性的相似性和差异性。
The diversity of body shapes is one of the most prominent features of phenotypic variation in vertebrates. Biologists, however, still lack a full understanding of the underlying morphological components that contribute to its diversity, particularly in endothermic vertebrates such as mammals. In this study, hypotheses pertaining to the evolution of the cranial and axial components that contribute to the diversity of carnivoran body shapes were tested. Three trends were found in the evolution of carnivoran body shapes: (1) carnivorans exhibit diverse body shapes with intrafamilial variation predicted best by family clade age, (2) body shape is driven by strong allometric effects of body size where species become more elongate with decreasing size, and (3) the thoracic and lumbar regions and rib length contribute the most to body shape variation, albeit pathways differ between different families. These results reveal the morphological patterns that led to increased diversity in carnivoran body shapes and elucidate the similarities and dissimilarities that govern body shape diversity across vertebrates.
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发表时间: 2014
期刊: PloS one
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