Craniofacial development illuminates the evolution of nightbirds (Strisores).
Craniofacial development illuminates the evolution of nightbirds (Strisores).
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DOI：
10.1098/rspb.2021.0181
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发表时间：
2021-04-14
期刊：
影响因子：
--
通讯作者：
Rayfield EJ
中科院分区：
文献类型：
--
作者：
Navalón G;Nebreda SM;Bright JA;Fabbri M;Benson RBJ;Bhullar BA;Marugán-Lobón J;Rayfield EJ
个体发生的进化变异在鸟类头骨的起源中起着核心作用。然而，它对随后的鸟类进化的影响在很大程度上尚未被探索。我们评估了夜间鸟（Strisores）颅骨形态的个体发生和进化变异之间的联系。夜鸟的生态环境、体型、生活史特征和颅面形态的差异非常大，为鸟类颅面进化的进化假设提供了理想的测试。这些形态包括雨燕、夜莺和相关谱系的表面上“像少年一样”的宽而平的头骨，喙短，轨道大，蜂鸟的喙长而窄，头骨呈球形。在这里，我们表明，夜鸟头骨经历了巨大的个体发生形状变化，这与广泛存在的鸟类模式有很大不同。虽然许多成年夜鸟表面上的幼年颅骨形态是趋同进化的结果，而不是幼体发育的结果，但蜂鸟的不同颅骨形态源于向更典型的鸟类个体发育轨迹的进化逆转，并伴随着个体发育形状的加速变化。我们的研究结果强调了鸟类颅骨生长和发育的进化不稳定性，以及在羊膜颅骨宏观进化多样化中表型变异的这方面未被充分认识的作用。
Evolutionary variation in ontogeny played a central role in the origin of the avian skull. However, its influence in subsequent bird evolution is largely unexplored. We assess the links between ontogenetic and evolutionary variation of skull morphology in Strisores (nightbirds). Nightbirds span an exceptional range of ecologies, sizes, life-history traits and craniofacial morphologies constituting an ideal test for evo-devo hypotheses of avian craniofacial evolution. These morphologies include superficially ‘juvenile-like’ broad, flat skulls with short rostra and large orbits in swifts, nightjars and allied lineages, and the elongate, narrow rostra and globular skulls of hummingbirds. Here, we show that nightbird skulls undergo large ontogenetic shape changes that differ strongly from widespread avian patterns. While the superficially juvenile-like skull morphology of many adult nightbirds results from convergent evolution, rather than paedomorphosis, the divergent cranial morphology of hummingbirds originates from an evolutionary reversal to a more typical avian ontogenetic trajectory combined with accelerated ontogenetic shape change. Our findings underscore the evolutionary lability of cranial growth and development in birds, and the underappreciated role of this aspect of phenotypic variability in the macroevolutionary diversification of the amniote skull.
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影响因子：
2.7
作者：
ALBERCH, P;GOULD, SJ;WAKE, DB
通讯作者：
WAKE, DB
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2
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