Out of Asia: Natricine snakes support the Cenozoic Beringian Dispersal Hypothesis
Out of Asia: Natricine snakes support the Cenozoic Beringian Dispersal Hypothesis
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走出亚洲：Natricine蛇支持新生代白令海峡扩散假说
DOI：
10.1016/j.ympev.2012.02.021
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发表时间：
2012-06-01
影响因子：
4.1
通讯作者：
Burbrink, Frank T.
中科院分区：
文献类型：
--
作者：
Guo, Peng;Liu, Qin;Burbrink, Frank T.
基于来自22个属的6个线粒体基因片段（125 RNA, cyt b, ND1, ND2， ND4和CO1）和一个核基因（c-mos）的组合，我们推断了钠蛇之间的系统发育关系，并对这些蛇的起源日期和区域进行了研究。我们的系统发育结果表明：(1)Natricinae亚科是单系的，包括大多数现存的属，以及一个鲜为人知和以前未指定的种Trachischium monticola；(2)在Natricinae中推断出两个主要的分支，一个只包含来自旧大陆（OW）的类群，另一个包括来自新世界（NW）的单系类群，具有少量的OW亲缘关系。在第一分支中，Xenochrophis属和Amphiesma属显然不是单系的。分度定年和祖先面积估算表明，钠碱系起源于始新世晚期或渐新世的热带亚洲。我们恢复了两次主要的亚洲外扩散事件，第一次是在渐新世（28 Ma）向非洲扩散，第二次是在27 Ma向西古北和新世界扩散。这一日期与许多其他低地类群向西北地区的分散是一致的。(C) 2012爱思唯尔公司版权所有。
Based on a combination of six mitochondrial gene fragments (125 RNA, cyt b, ND1, ND2, ND4 and CO1) and one nuclear gene (c-mos) from 22 genera we infer phylogenetic relationships among natricine snakes and examine the date and area of origin of these snakes. Our phylogenetic results indicate: (1) the subfamily Natricinae is strongly supported as monophyletic including a majority of extant genera, and a poorly known and previously unassigned species Trachischium monticola, (2) two main clades are inferred within Natricinae, one containing solely taxa from the Old World (OW) and the other comprising taxa from a monophyletic New World (NW) group with a small number of OW relatives. Within the first clade, the genera Xenochrophis and Amphiesma are apparently not monophyletic. Divergence dating and ancestral area estimation indicate that the natricines originated in tropical Asia during the later Eocene or the Oligocene. We recover two major dispersals events out of Asia, the first to Africa in the Oligocene (28 Ma) and the second to the Western Palearctic and the New World at 27 Ma. This date is consistent with the dispersal of numerous other OW groups into the NW. (C) 2012 Elsevier Inc. All rights reserved.