Total-Evidence Framework Reveals Complex Morphological Evolution in Nightbirds (Strisores)
Total-Evidence Framework Reveals Complex Morphological Evolution in Nightbirds (Strisores)
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DOI：
10.3390/d11090143
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发表时间：
2019-09-01
期刊：
影响因子：
2.4
通讯作者：
Field, Daniel J.
中科院分区：
文献类型：
--
作者：
Chen, Albert;White, Noor D.;Field, Daniel J.
Strisores是新鸟类的一个分支，包括白天飞行的专家，如雨燕和蜂鸟，以及几个主要的夜间血统，如夜鹰和potoos。尽管使用基因组规模的分子数据集，主要的strisorean群体之间的系统发育相互关系仍然存在争议。鉴于下一代序列数据的可用性和分支的丰富的化石记录，我们重新评估了strisores通过将一个大规模的序列数据集与解剖数据从生活和化石strisoreans贝叶斯全证据框架内的strisores的进化。结合分子和形态学数据的分析，导致在一个系统发育的拓扑结构，与最近的两个分子生物学基因组研究的结果是一致的，支持夜鹰（Caprimulgidae）作为现存的姐妹组的其余的Strisores。这个全证据框架使我们能够识别以前使用分子数据集恢复的strisorean分支的形态学突触。然而，分子和形态学数据的综合分析突出了序列和解剖数据之间的强烈信号冲突。此外，分子和形态数据的同时分析恢复不同的位置，一些化石类群的分子支架下的形态数据的分析相比，突出了分析决策的重要性时，进行形态系统发育分析的类群与分子系统发育数据。我们认为，多个strisorean血统经历了收敛的进化在整个骨架，混淆了某些化石的系统发育位置，并获得了许多独特的专业化的strisorean亚支在其进化历史的早期。尽管这种明显的复杂性，在进化史上的Strisores，我们的研究结果提供了化石支持空中觅食的祖先的生态策略的Strisores，所暗示的最近的系统发育拓扑结构来自分子数据。
Strisores is a clade of neoavian birds that include diurnal aerial specialists such as swifts and hummingbirds, as well as several predominantly nocturnal lineages such as nightjars and potoos. Despite the use of genome-scale molecular datasets, the phylogenetic interrelationships among major strisorean groups remain controversial. Given the availability of next-generation sequence data for Strisores and the clade's rich fossil record, we reassessed the phylogeny of Strisores by incorporating a large-scale sequence dataset with anatomical data from living and fossil strisoreans within a Bayesian total-evidence framework. Combined analyses of molecular and morphological data resulted in a phylogenetic topology for Strisores that is congruent with the findings of two recent molecular phylogenomic studies, supporting nightjars (Caprimulgidae) as the extant sister group of the remainder of Strisores. This total-evidence framework allowed us to identify morphological synapomorphies for strisorean clades previously recovered using molecular-only datasets. However, a combined analysis of molecular and morphological data highlighted strong signal conflict between sequence and anatomical data in Strisores. Furthermore, simultaneous analysis of molecular and morphological data recovered differing placements for some fossil taxa compared with analyses of morphological data under a molecular scaffold, highlighting the importance of analytical decisions when conducting morphological phylogenetic analyses of taxa with molecular phylogenetic data. We suggest that multiple strisorean lineages have experienced convergent evolution across the skeleton, obfuscating the phylogenetic position of certain fossils, and that many distinctive specializations of strisorean subclades were acquired early in their evolutionary history. Despite this apparent complexity in the evolutionary history of Strisores, our results provide fossil support for aerial foraging as the ancestral ecological strategy of Strisores, as implied by recent phylogenetic topologies derived from molecular data.