Molecular phylogeny and DNA barcoding confirm cryptic species in the African freshwater oyster Etheria elliptica Lamarck, 1807 (Bivalvia: Etheriidae)
Molecular phylogeny and DNA barcoding confirm cryptic species in the African freshwater oyster Etheria elliptica Lamarck, 1807 (Bivalvia: Etheriidae)
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DOI：
10.1111/bij.12734
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发表时间：
2016-06-01
影响因子：
1.9
通讯作者：
Albrecht, Christian
中科院分区：
文献类型：
--
作者：
Elderkin, Curt L.;Clewing, Catharina;Albrecht, Christian
最近的分子分类方法导致了一个稳定的增加，在确定的神秘物种。在Etheriidae中，Etheria elliptica（淡水牡蛎）是一种广泛而常见的物种，存在于大多数主要的非洲流域。在非洲淡水生态系统内，生物多样性面临重大威胁，神秘物种使保护战略复杂化;存在未知物种，没有指定保护地位。我们的目的是确定是否E.椭圆形从几个位置在刚果排水正确分类为代表一个单一的物种。我们分析了两个线粒体基因座（COI和16 S）和两个核基因座（H3和28 S）的遗传多样性，并使用系统发育和DNA条形码技术估计进化关系。贝叶斯推理产生了三个神秘的物种的Etheria，和不匹配分析显示的神秘物种之间的离散差异。我们确定了三个神秘的物种在这些集合中，有证据表明，第三个物种可能会进一步解决更多的采样。总而言之，椭圆叶桉的分类历史使得发现神秘物种并不令人惊讶。然而，像这样的分子研究可能最终有助于解决该属内的物种数量。
Recent molecular approaches to taxonomy have led to a steady increase in the identification of cryptic species. Within the Etheriidae, the species Etheria elliptica (freshwater oyster) is widespread and common and exists in most of the major African drainages. Within the African freshwater ecosystems, there are major threats to biodiversity and cryptic species complicate conservation strategies; unknown species exist and no conservation status has been assigned. Our objective here was to determine if E.elliptica from several locations in the Congo drainage are correctly classified as representing a single species. We analysed the genetic diversity at two mitochondrial loci (COI and 16S) and two nuclear loci (H3 and 28S), and estimated evolutionary relationships using phylogenetic and DNA barcoding techniques. Bayesian inference yielded three cryptic species of Etheria, and mismatch analysis revealed discrete differences between the cryptic species. We identified three cryptic species within these collections, and evidence indicates that the third species may resolve further with more sampling. In conclusion, the taxonomic history of E.elliptica makes finding cryptic species unsurprising. However, molecular studies such as this may finally help to resolve the number of species within this genus.