Phylogenetic structure and species boundaries in the mountain pitviper Ovophis monticola (Serpentes: Viperidae: Crotalinae) in Asia
Phylogenetic structure and species boundaries in the mountain pitviper Ovophis monticola (Serpentes: Viperidae: Crotalinae) in Asia
复制标题
亚洲山地蝰蛇 Ovophis monticola（蛇类：蝰蛇科：响尾蛇亚科）的系统发育结构和物种界限
DOI：
10.1016/j.ympev.2011.02.010
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发表时间：
2011-05-01
影响因子：
4.1
通讯作者：
Thorpe, Roger S.
中科院分区：
文献类型：
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作者：
Malhotra, Anita;Dawson, Karen;Thorpe, Roger S.
通过对72个标本的4个线粒体标记(细胞色素b、NADH脱氢酶亚基4、12S和16S rRNA)的测序，研究了亚洲山蛇属(包括3-4种，其中一些被认为是多型)的系统发育结构和形态变异，并与来自密切相关属的26个序列一起在贝叶斯框架下进行了分析。我们利用似然框架分析重建了主要支系的起源区域和扩散方向，以及整个奥沃菲斯的起源区域和扩散方向。我们还定义了来自卵形动物群范围内的280个标本的形态群，以确定主要支系的地理范围，并允许纳入缺乏序列数据的标本。系统发育分析证实了目前定义的卵壳类单系，并揭示它包含两个主要谱系，东部(主要是中国人)和西部，两者都发生在越南中部和北部的中国西南部。该属和个体谱系的最有可能的起源与印支马拉雅热点的东北边界重合。这一物种群的主要多样性可能与青藏高原在早至中新世隆升引起的重大气候变化相对应。关于已定义的形态群，我们建议至少存在五个种，并提供适当的名称。除了少数例外，新定义的物种边界与现有的分类学并不一致。(C)2011 Elsevier Inc.保留所有权利。
We investigated phylogenetic structure and morphological variation in Asian mountain pitvipers of the genus Ovophis (comprising 3-4 species some of which are considered polytypic) by sequencing four mitochondrial markers (cytochrome b, NADH dehydrogenase subunit 4, 12S and 16S rRNA) from 72 specimens, and analysed them in a Bayesian framework together with another 26 sequences from closely related genera. We reconstructed the region of origin and direction of dispersal of the major clades, and of Ovophis as a whole, using likelihood framework analysis. We also defined morphogroups from 280 specimens from across the range of Ovophis to allow the geographic extent of the major clades to be determined, as well as to allow inclusion of specimens lacking sequence data. Phylogenetic analyses confirmed the monophyly of Ovophis as currently defined, and revealed that it contains two major lineages, eastern (mainly Chinese) and western, with both occurring in southwestern China, central and northern Viet Nam. The most likely origin of the genus, and of individual lineages, coincides with the northeastern boundary of the Indomalayan hotspot. Major diversification in this species group likely corresponded to major climatic changes arising from the uplift of the Tibetan Plateau in the early to mid Miocene. With reference to the defined morphogroups, we suggest that at least five species are present and provide appropriate names. With a few exceptions, the newly defined species boundaries do not correspond to the existing taxonomy. (C) 2011 Elsevier Inc. All rights reserved.