Molecular phylogeny of the orb-weaving spider genus Leucauge and the intergeneric relationships of Leucauginae (Araneae, Tetragnathidae)
Molecular phylogeny of the orb-weaving spider genus Leucauge and the intergeneric relationships of Leucauginae (Araneae, Tetragnathidae)
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DOI：
10.1071/is21029
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发表时间：
2021-11
影响因子：
2.2
通讯作者：
Jesús A. Ballesteros;G. Hormiga
中科院分区：
文献类型：
--
作者：
Jesús A. Ballesteros;G. Hormiga
抽象的。银汉蛛属包括一些热带地区最常见的圆织蜘蛛。虽然在这个属的一些物种已经达到了相关的蜘蛛生物学的几个方面的模型系统，我们的物种之间的遗传多样性和进化关系的理解是穷人。在这项研究中，我们提出了第一次尝试，以确定系统发育结构内Leucauge和本属与其他属的Leucauginae的关系。这是基于常用的五个基因座的DNA序列和首次用于蜘蛛染色体遗传学的组蛋白H4。我们还评估了标准标记物的信息量，并测试了数据集中的碱基组成偏差。我们的研究结果表明，Leucauge是不是单系，因为Opas，Opadometa，Mecynometa和Alcimosphenus属的物种包括在目前的界限属。根据对该属的系统发育重新界定，Leucauge白色，1841被认为是Opas Pickard-Cambridge，1896年重新确认的同物异名，Mecynometa Simon，1894年重新确认的同物异名，Opadometa Archer，1951年新同物异名和Alcimosphenus Simon，1895年新同物异名的高级同物异名。我们确定组的分类群解决Leucauginae内的关系至关重要，并描述了完成这些决议的标准位点的局限性。
Abstract. The tetragnathid genus Leucauge includes some of the most common orb-weaving spiders in the tropics. Although some species in this genus have attained relevance as model systems for several aspects of spider biology, our understanding of the generic diversity and evolutionary relationships among the species is poor. In this study we present the first attempt to determine the phylogenetic structure within Leucauge and the relationship of this genus with other genera of Leucauginae. This is based on DNA sequences from the five loci commonly used and Histone H4, used for the first time in spider phylogenetics. We also assess the informativeness of the standard markers and test for base composition biases in the dataset. Our results suggest that Leucauge is not monophyletic since species of the genera Opas, Opadometa, Mecynometa and Alcimosphenus are included within the current circumscription of the genus. Based on a phylogenetic re-circumscription of the genus to fulfil the requirement for monophyly of taxa, Leucauge White, 1841 is deemed to be a senior synonym of the genera Opas Pickard-Cambridge, 1896 revalidated synonymy, Mecynometa Simon, 1894 revalidated synonymy, Opadometa Archer, 1951 new synonymy and Alcimosphenus Simon, 1895 new synonymy. We identify groups of taxa critical for resolving relationships within Leucauginae and describe the limitations of the standard loci for accomplishing these resolutions.