Uncovering cryptic diversity in Aspidomorphus (Serpentes: Elapidae): evidence from mitochondrial and nuclear markers.
Uncovering cryptic diversity in Aspidomorphus (Serpentes: Elapidae): evidence from mitochondrial and nuclear markers.
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揭示 Aspidomorphus(蛇类:Elapidae)的神秘多样性:来自线粒体和核标记的证据。
DOI:
10.1016/j.ympev.2009.07.027
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发表时间:
2010
影响因子:
4.1
通讯作者:
Parkinson,ChristopherL
中科院分区:
文献类型:
--
作者:
Metzger,GenevieveA;Kraus,Fred;Allison,Allen;Parkinson,ChristopherL
The Papuan region, comprising New Guinea and nearby islands, has a complex geological history that has fostered high levels of biodiversity and endemism. Unfortunately, much of this diversity remains undocumented. We examine the evolutionary relationships of the venomous snake genus Aspidomorphus (Elapidae: Hydrophiinae), a Papuan endemic, and document extensive cryptic lineage diversification. Between Aspidomorphus species we find 22.2–27.9% corrected cyt-b sequence divergence. Within species we find 17.7–23.7% maximum sequence divergence. These high levels of genetic divergence may have complicated previous phylogenetic studies, which have had difficulty placing Aspidomorphus within the subfamily Hydrophiinae. Compared to previous studies, we increase sampling within Hydrophiinae to include all currently recognized species of Aspidomorphus and increase species representation for the genera Demansia and Toxicocalamus. We confirm monophyly of Aspidomorphus and resolve placement of the genus utilizing a set of seven molecular markers (12S, 16S, cyt-b, ND4, c-mos, MyHC-2, and RAG-1); we find strong support for a sister-group relationship between Aspidomorphus and a Demansia/Toxicocalamus preussi clade. We also use one mitochondrial (cyt-b) and one nuclear marker (SPTBN1) to document deep genetic divergence within all currently recognized species of Aspidomorphus and discuss the Solomon Island Arc as a potential center of divergence in this species. Lastly, we find high levels of concordance between the mtDNA and nuDNA markers used for inter-species phylogenetic reconstruction.
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