Phylogenetic structure of Neotropical annual fish of the genus Cynopoecilus (Cyprinodontiformes: Rivulidae), with an assessment of taxonomic implications,Journal of Zoological Systematics and Evolutionary Research

当前位置： X-MOL 学术 › J. Zool. Syst. Evol. Res. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Phylogenetic structure of Neotropical annual fish of the genus Cynopoecilus (Cyprinodontiformes: Rivulidae), with an assessment of taxonomic implications
Journal of Zoological Systematics and Evolutionary Research ( IF 2.0 ) Pub Date : 2020-06-10 , DOI: 10.1111/jzs.12389
Daiana Kaster Garcez ₁ , Murilo Oliveira Fernandes ₁ , Gabrielli Rosa Ozório ₁ , Matheus Vieira Volcan ₂ , Lizandra Jaqueline Robe _{1,

3}

Affiliation

The definition of species boundaries constitutes an important challenge in biodiversity studies. Cynopoecilus Regan, 1912 encompasses several endangered species of annual fish, occurring in temporary ponds in a restricted area of Southern Brazil and Uruguay. Divergences about the taxonomic status of Cynopoecilus species highlight the importance of species delimitation studies. Therefore, we address here the phylogenetic structure of Cynopoecilus, while assessing its taxonomic implications. For this, fragments of the mitochondrial COI and nuclear RAG1 genes were characterized and analyzed for a set of 275 and 280 specimens, respectively. DNA barcoding and phylogenetic analyses detected subdivision of these specimens in 8–10 clusters, which comprise the six previously described species, and suggest one invalid taxon and at least 3–5 putative new species. The phylogenetic structure also suggests that the Jacuí River and the Patos Lagoon historically acted as effective barriers to gene flow between populations, although some isolated dispersal events across these water bodies could be evidenced, especially for C. melanotaenia Regan, 1912. In general, the results highlight the need of independent conservation strategies within the distribution area of each of the endemic allopatric killifish clusters, while questioning several taxonomic boundaries and distribution data.

中文翻译：

食蟹类新热带一年生鱼类的系统发育结构（Cyprinodontiformes：Rivulidae），并对其分类学意义进行了评估

物种边界的定义对生物多样性研究构成了重要挑战。里根的Cynopoecilus Regan（1912年）包括几种濒危的一年生鱼类，这些鱼类在巴西南部和乌拉圭的禁区临时池塘中栖息。食蟹猴物种在分类学地位上的分歧突出了物种划界研究的重要性。因此，在评估其分类学意义的同时，我们在此阐述了猕猴的系统发育结构。为此，线粒体COI和核RAG1的片段分别对275个样本和280个样本的特征基因进行了分析。DNA条形码和系统发育分析将这些标本细分为8-10个簇，包括先前描述的6个物种，并提出了一个无效的分类单元和至少3-5个推定的新物种。系统发育结构还表明，尽管可以证明在这些水体中存在一些孤立的散布事件，特别是对于黑腹念珠菌，但Jacuí河和Patos泻湖历来是种群之间基因流动的有效屏障。里根（Regan），1912年。总体而言，研究结果突显了在每个地方性异特异比目鱼集群的分布区域内需要采取独立保护策略的问题，同时对若干分类学界限和分布数据提出了质疑。

更新日期：2020-06-10

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11