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首页> 外文期刊>Molecular phylogenetics and evolution >Diversity of Loxosceles spiders in Northwestern Africa and molecular support for cryptic species in the Loxosceles rufescens lineage
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Diversity of Loxosceles spiders in Northwestern Africa and molecular support for cryptic species in the Loxosceles rufescens lineage

机译：西北非洲蛇纹蜘蛛的多样性和线粒体谱系的隐性物种分子支持

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摘要

Until recently, Loxosceles rufescens was the only species known from a geographic range including Northern Africa, Mediterranean Europe and the Middle East. Rich Loxosceles diversity in the New World suggests either that L. rufescens is a young lineage or that its diversity is underappreciated. We use a molecular phylogenetic and morphological approach to examine diversity in L. rufescens and other Loxosceles lineages in Northwestern Africa. Molecular analyses of one nuclear and two mitochondrial genes strongly support a monophyletic clade including L. rufescens, the Northern Brazilian L. amazonica and three other divergent Northwestern African lineages, though relationships among them remain unresolved. A genetically divergent Moroccan individual morphologically consistent with L. rufescens was strongly supported as sister to all other putative L. rufescens, consistent with the presence of at least 2 species in this lineage. COI p-distances and population structuring among remaining putative L. rufescens clades further suggest the absence of gene flow between clades and the possibility that they represent multiple species. Morphological characters of preserved Loxosceles collected in a range of African countries provide additional indication that Loxosceles are more diverse and have a deeper history in Africa than has been previously understood.
机译：直到最近，非洲紫罗兰（Loxosceles rufescens）还是包括北非，地中海欧洲和中东在内的唯一已知地理物种。新世界中丰富的凤尾科植物多样性提示，紫花苜蓿是年轻的血统，或者其多样性没有得到充分重视。我们使用分子系统发育和形态学方法来检查非洲西北部的非洲紫苏和其他凤尾血统的多样性。对一个核和两个线粒体基因的分子分析有力地支持了单系进化进化枝，包括rufescens，巴西北部的L. amazonica和其他三个西北非洲的不同谱系，尽管它们之间的关系仍未解决。强烈支持在遗传学上与卢塞斯氏乳杆菌一致的摩洛哥个体作为所有其他假定的卢塞斯氏乳杆菌的姐妹，这与该谱系中至少存在两种​​物种一致。其余推定的红褐线虫进化枝中的COI p-距离和种群结构进一步表明，进化枝之间不存在基因流，它们可能代表多种物种。在许多非洲国家中收集的腌制的腰果的形态特征进一步表明，腰果在非洲比以前所了解的更加多样化，历史更深。

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