Increased molecular divergence of two endemic Trachelipus (Isopoda, Oniscidea) species from Greece reveals patterns not congruent with current taxonomy
Increased molecular divergence of two endemic Trachelipus (Isopoda, Oniscidea) species from Greece reveals patterns not congruent with current taxonomy
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DOI：
10.1111/j.1095-8312.2008.01054.x
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发表时间：
2008-10-01
影响因子：
1.9
通讯作者：
Sfenthourakis, Spyros
中科院分区：
文献类型：
--
作者：
Parmakelis, Aristeidis;Klossa-Kilia, Elena;Sfenthourakis, Spyros
在本研究中，我们使用了三个线粒体DNA遗传标记进行系统发育分析，目的是描述名义种群之间的关系，以及该物种与山竹种群之间的关系，以及与后者同源出现的一个新变型。无论是系统发育分析还是种群间的遗传距离，都表明存在几个不同的、分化良好的分支，它们破坏了凯瑟龙的单系。另一方面，尽管Aegaeus种群呈岛状分布，但它们的分异程度很低，该分类群的单系性可以通过包含另外两个先前归属于T kytherens的岛状种群来挽救。各支系间的遗传分化模式仅与种群的地理分布部分一致。到目前为止，该属分类特征的有效性似乎是值得怀疑的；因此，有必要在种群水平上进行更全面的系统发育研究，以了解Trachelipus谱系的差异。(C)2008年伦敦林尼安学会，《林尼安学会生物杂志》，2008年，95,361-370。
In the present study, we employed three mitochondrial DNA genetic markers in a phylogenetic analysis aiming at the delineation of the relationships amongst nominal Trachelipus kytherensis populations, as well as between populations of this species and of Trachelipus aegaeus and a new form, occurring syntopically with the latter. Both the phylogenetic analysis and the genetic distances separating populations, show the presence of several distinct and well differentiated clades that undermine the monophyly of T kytherensis. On the other hand, despite the insular distribution of T aegaeus populations, their divergence is low and the monophyly of this taxon can be rescued by the inclusion of two more insular populations previously assigned to T kytherensis. The patterns of genetic divergence among clades are only partially congruent with the geographic distribution of populations. The validity of taxonomic characters used so far in the genus appears to be questionable; therefore, a more comprehensive phylogenetic study at a population level is deemed necessary for understanding the divergence of Trachelipus lineages. (C) 2008 The Linnean Society of London, Biological Journal of the Linnean Society, 2008, 95, 361-370.