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首页> 外文期刊>Molecular phylogenetics and evolution >MtDNA and nDNA corroborate existence of sympatric dwarf lemur species at Tsinjoarivo, eastern Madagascar
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MtDNA and nDNA corroborate existence of sympatric dwarf lemur species at Tsinjoarivo, eastern Madagascar

机译：MtDNA和nDNA证实了马达加斯加东部Tsinjoarivo的同伴矮人狐猴物种的存在

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摘要

Madagascar is a biodiversity hotspot, well known for its endemic primates, the lemurs. Numbers of recognized lemur species have increased drastically in some genera (e.g. Microcebus), while field-based studies revealed low species diversity in the dwarf lemurs (genus Cheirogaleus). Only three (C. medius, C. major, C. crossleyi) of seven described species have to date been identified in field-based studies. Blanco et al. (2009) reported two sympatric Cheirogaleus species at Tsinjoarivo based on morphological data, one of which they attributed to C. crossleyi and the other of which they described as C. sibreei-like, or possibly a new species. Based on comparative analyses of mtDNA (cytb) and nDNA (vWF, fiba, adora3), we confirm the presence of C. crossleyi and show that the C. sibreei-like individuals form a well-defined fourth clade, basal to the three recognized species. Whereas these molecular analyses demonstrate that a non-holotype museum specimen considered by Groves (2000) to belong to C. sibreei does not cluster with the C. sibreei-like individuals from Tsinjoarivo, morphometric analysis of one Tsinjoarivo individual, the C. sibreei holotype from Ankeramadinika, and samples of C. medius, C. major, and C. crossleyi strongly suggests that the fourth (and basal) clade is indeed C. sibreei. Tsinjoarivo therefore becomes the only known field site harboring C. sibreei today. Given ongoing forest loss and fragmentation at Tsinjoarivo we can surmise that this population, critical to our understanding of the evolution of the genus Cheirogaleus, is also critically endangered.
机译：马达加斯加是一个生物多样性热点，以其特有的灵长类动物狐猴而闻名。在某些属（例如Microcebus）中，公认的狐猴物种的数量急剧增加，而基于野外的研究表明，侏儒狐猴（Cheirogaleus属）的物种多样性较低。迄今为止，在野外研究中仅发现了七个所述物种中的三个（C. medius，C。major，C。crossleyi）。布兰科等。 （2009年）根据形态学数据，在津约阿里沃（Tsinjoarivo）报道了两种同胞螯蟹属（Cheirogaleus）物种，其中一种归因于C. crossleyi，另一种则被描述为类似C. sibreei的物种，或者可能是一个新物种。基于对mtDNA（cytb）和nDNA（vWF，fiba，adora3）的比较分析，我们证实了C. crossleyi的存在，并表明C. sibreei样个体形成了一个明确定义的第四进化枝，基于三个公认的种类。尽管这些分子分析表明，格罗夫斯（2000）认为非整体性博物馆标本属于西伯利亚梭菌，但与Tsinjoarivo的西伯利亚梭菌样个体不聚类，而对一个Tsinjoarivo个体的形态计量分析为西伯利亚梭菌全称。 C. medius，C。major和C. crossleyi的样本强烈表明，第四（和基础）进化枝确实是C. sibreei。因此，钦乔里沃（Tsinjoarivo）成为当今唯一拥有西伯利亚梭菌的野外站点。鉴于津乔亚里沃（Tsinjoarivo）森林不断流失和支离破碎，我们可以推测，这对我们了解白嘴猴属的进化至关重要，这一种群也受到严重威胁。

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