Molecular phylogenetics of shrews (Mammalia: Soricidae) reveal timing of transcontinental colonizations
Molecular phylogenetics of shrews (Mammalia: Soricidae) reveal timing of transcontinental colonizations
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DOI：
10.1016/j.ympev.2006.12.002
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发表时间：
2007-07-01
影响因子：
4.1
通讯作者：
Vogel, Peter
中科院分区：
文献类型：
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作者：
Dubey, Sylvain;Salamin, Nicolas;Vogel, Peter
我们在鼩鼱类群中测序了2167个碱基对（bp）的线粒体DNA细胞色素b和16S，以及1390个碱基对的核基因BRCA1和ApoB。目的是研究这一科在更高的分类水平上的关系，特别是像Anourosorex和Myosorex这样的困难分支的位置。这些数据证实了两个单系亚科，Soricinae和Crocidurinae。在前者，部落Anourosoricini， Blarinini, Nectogalini， Notiosoricini和Soricini得到支持。后者由Myosoricini和Crocidurini部落组成。Suncus属似乎是附生的，包括Sylvisorex。我们进一步提出了一种生物地理学假说，认为在中新世中期，北美洲曾被三个独立的索林纳科分支所殖民。我们的假设与这些分类群的最初化石记录是一致的。利用分子定年法，非洲和欧亚大陆之间的第一次交流发生在中新世中期。最后一次发生在晚中新世，随着鳄属在旧大陆的分散。(c) 2006爱思唯尔公司版权所有。
We sequenced 2167 base pairs (bp) of mitochondrial DNA cytochrome b and 16S, and 1390 bp of nuclear genes BRCA1 and ApoB in shrews taxa (Eulipotyphla, family Soricidae). The aim was to study the relationships at higher taxonomic levels within this family, and in particular the position of difficult clades such as Anourosorex and Myosorex. The data confirmed two monophyletic subfamilies, Soricinae and Crocidurinae. In the former, the tribes Anourosoricini, Blarinini, Nectogalini, Notiosoricini, and Soricini were supported. The latter was formed by the tribes Myosoricini and Crocidurini. The genus Suncus appeared to be paraphyletic and included Sylvisorex. We further suggest a biogeographical hypothesis, which shows that North America was colonized by three independent lineages of Soricinae during middle Miocene. Our hypothesis is congruent with the first fossil records for these taxa. Using molecular dating, the first exchanges between Africa and Eurasia occurred during the middle Miocene. The last one took place in the Late Miocene, with the dispersion of the genus Crocidura through the old world. (c) 2006 Elsevier Inc. All rights reserved.