Evolutionary relationships of the critically endangered frog Ericabatrachus baleensis Largen, 1991 with notes on incorporating previously unsampled taxa into large-scale phylogenetic analyses.
Evolutionary relationships of the critically endangered frog Ericabatrachus baleensis Largen, 1991 with notes on incorporating previously unsampled taxa into large-scale phylogenetic analyses.
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DOI：
10.1186/1471-2148-14-44
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发表时间：
2014-03-10
影响因子：
3.4
通讯作者：
Loader SP
中科院分区：
文献类型：
--
作者：
Siu-Ting K;Gower DJ;Pisani D;Kassahun R;Gebresenbet F;Menegon M;Mengistu AA;Saber SA;de Sá R;Wilkinson M;Loader SP
由于缺乏适当的数据和/或分析，许多分类群的系统发育关系仍然知之甚少。尽管最近取得了重大进展，但两栖动物的生殖发育在许多情况下仍然没有得到很好的解决。埃塞俄比亚特有的单型属Ericabatrachus的系统发育关系已解决到目前为止，只有表型数据，仍然存在争议。我们获得了现已稀有且极度濒危的Ericabatrachus baleensis的新鲜样本，并生成了两个线粒体基因和四个核基因的DNA序列。分析这些新的数据使用从头和约束树系统发育重建强烈支持Ericabatrachus和Petropedetes之间的密切关系，并允许我们拒绝先前提出的替代假设cacosternines或Phrynobatrachus的密切关系。我们讨论了我们的研究结果的分类，地理和保护E。baleensis，并提出了一个两层的方法来列入和分析新的数据，以评估以前未采样的类群的系统发育关系。考虑到相关的大型路线和潜在的框架路线的可获得性日益增加，这种方法在未来将是重要的。
The phylogenetic relationships of many taxa remain poorly known because of a lack of appropriate data and/or analyses. Despite substantial recent advances, amphibian phylogeny remains poorly resolved in many instances. The phylogenetic relationships of the Ethiopian endemic monotypic genus Ericabatrachus has been addressed thus far only with phenotypic data and remains contentious. We obtained fresh samples of the now rare and Critically Endangered Ericabatrachus baleensis and generated DNA sequences for two mitochondrial and four nuclear genes. Analyses of these new data using de novo and constrained-tree phylogenetic reconstructions strongly support a close relationship between Ericabatrachus and Petropedetes, and allow us to reject previously proposed alternative hypotheses of a close relationship with cacosternines or Phrynobatrachus. We discuss the implications of our results for the taxonomy, biogeography and conservation of E. baleensis, and suggest a two-tiered approach to the inclusion and analyses of new data in order to assess the phylogenetic relationships of previously unsampled taxa. Such approaches will be important in the future given the increasing availability of relevant mega-alignments and potential framework phylogenies.
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