Off-target capture data, endosymbiont genes and morphology reveal a relict lineage that is sister to all other singing cicadas
Off-target capture data, endosymbiont genes and morphology reveal a relict lineage that is sister to all other singing cicadas
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DOI：
10.1093/biolinnean/blz120
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发表时间：
2019-12
影响因子：
1.9
通讯作者：
C. Simon;Eric R L Gordon;M. Moulds;J. Cole;Diler Haji;Alan R. Lemmon;E. Lemmon;Michelle L. Kortyna-Michelle-L.-Ko
中科院分区：
文献类型：
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作者：
C. Simon;Eric R L Gordon;M. Moulds;J. Cole;Diler Haji;Alan R. Lemmon;E. Lemmon;Michelle L. Kortyna-Michelle-L.-Ko
系统发育不对称在整个生命树中很常见，这是由于祖先节点的成对后代谱系中物种形成和灭绝的不同模式造成的。在结节的退化一侧，我们发现现存的‘残留’分类群位于漫长的、未分枝的谱系之上。在这里，我们展示了一种微小的、淡绿色的、鲜为人知的知了属蝉，它是阿根廷中部干旱地区退化的盐原生境的特有物种，是所有其他现代蝉的姊妹种。从基于探针的目标和非目标基因座的基因组杂交捕获数据和形态分支图推断蝉的核和线粒体系统发育支持这一假说。我们用蝉营养细菌内共生体Sulcia的基因组数据证实了这一结论，Sulcia是大型吸食植物昆虫(Auchenorribrncha)的一种古老而专有的内共生体，也是母系遗传系统发育数据的重要来源。我们建立了粉锈菌亚科。11月作为一个新的、单属的第五亚科蝉，并汇编现有的和新的关于粉蝉的分布、生态和食性的资料。我们对古环境文献和寄主植物系统发育的考虑使我们能够预测是什么导致了皮肤病在南美洲100多万英里的栖息地变化中的残留状态。
Phylogenetic asymmetry is common throughout the tree of life and results from contrasting patterns of speciation and extinction in the paired descendant lineages of ancestral nodes. On the depauperate side of a node, we find extant ‘relict’ taxa that sit atop long, unbranched lineages. Here, we show that a tiny, pale green, inconspicuous and poorly known cicada in the genus Derotettix, endemic to degraded salt-plain habitats in arid regions of central Argentina, is a relict lineage that is sister to all other modern cicadas. Nuclear and mitochondrial phylogenies of cicadas inferred from probe-based genomic hybrid capture data of both target and non-target loci and a morphological cladogram support this hypothesis. We strengthen this conclusion with genomic data from one of the cicada nutritional bacterial endosymbionts, Sulcia, an ancient and obligate endosymbiont of the larger plant-sucking bugs (Auchenorrhyncha) and an important source of maternally inherited phylogenetic data. We establish Derotettiginae subfam. nov. as a new, monogeneric, fifth cicada subfamily, and compile existing and new data on the distribution, ecology and diet of Derotettix. Our consideration of the palaeoenvironmental literature and host-plant phylogenetics allows us to predict what might have led to the relict status of Derotettix over 100 Myr of habitat change in South America.