A mismatch between morphological and molecular data in lineages of Enteromius (Cypriniformes: Cyprinidae) from the Lowa basin (East Democratic Republic of the Congo: DRC) with the description of a new species

IF 1.8 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION Systematics and Biodiversity Pub Date : 2022-12-24 DOI:10.1080/14772000.2022.2135630

T. Kisekelwa, J. Snoeks, E. Decru, Frederic D B Schedel, M. Isumbisho, E. Vreven

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引用次数: 2

Abstract

Six populations of morphologically similar Enteromius specimens with a weakly thickened and serrated dorsal spine from the Lowa basin were investigated using an integrative approach including qualitative characters, multivariate morphometrics, and DNA analyses (mtCOI and ncMyh6). These populations are nested within the COI lineage of the E. miolepis species-complex, but differ from all known Enteromius species from the Congo basin, by their dorsal spine morphology, colour pattern, and scale pattern at the dorsal-fin base. In addition, they represent two distinct COI lineages (genetic distance: 5.6–6.1%), with four populations forming a single well-supported lineage described as a new species, Enteromius radari sp. nov. The two remaining populations are sister to the E. miolepis lineage from the Itimbiri. The incongruent position of these two populations in the COI tree may point to past introgressive hybridization events, incomplete lineage sorting, or recent speciation. Analysis of a ncDNA marker (Myh6) did not provide more information due to its slow mutation rate. These results are indicative for introgression or mtDNA capture and provide the first report for such an evolutionary event in Enteromius from the Congo basin. http://zoobank.org/urn:lsid:zoobank.org:pub:D2263E5B-D403-404C-B66C-852215ED100C

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来自爱荷华盆地(刚果民主共和国东部)的肠虫(鲤形目:鲤科)谱系的形态和分子数据与新物种描述的不匹配

采用综合定性、多变量形态计量学和DNA分析(mtCOI和ncMyh6)研究了来自爱荷华盆地的6个形态相似、背脊呈弱加厚和锯齿状的肠虫种群。这些种群嵌套在E. miolepis物种复合体的COI谱系中，但与刚果盆地所有已知的Enteromius物种不同，它们的背脊形态、颜色图案和背鳍基部的鳞片图案。此外，它们代表了两个不同的COI谱系(遗传距离:5.6-6.1%)，其中四个种群形成了一个被描述为新种的单一的有良好支持的谱系，Enteromius radari sp. 11 .剩余的两个种群是来自Itimbiri的E. miolepis谱系的姐妹。这两个种群在COI树中的位置不一致可能表明过去的渐进杂交事件，不完整的谱系分类或最近的物种形成。对一种ndna标记(Myh6)的分析由于其突变率较慢而没有提供更多的信息。这些结果表明了遗传渗入或mtDNA捕获，并首次报道了刚果盆地Enteromius的这种进化事件。http://zoobank.org/urn:lsid:zoobank.org:pub:D2263E5B-D403-404C-B66C-852215ED100C

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来源期刊

Systematics and Biodiversity 环境科学-生物多样性保护

CiteScore

4.10

自引率

0.00%

发文量

审稿时长

>24 weeks

期刊介绍： Systematics and Biodiversity is devoted to whole-organism biology. It is a quarterly, international, peer-reviewed, life science journal, without page charges, which is published by Taylor & Francis for The Natural History Museum, London. The criterion for publication is scientific merit. Systematics and Biodiversity documents the diversity of organisms in all natural phyla, through taxonomic papers that have a broad context (not single species descriptions), while also addressing topical issues relating to biological collections, and the principles of systematics. It particularly emphasises the importance and multi-disciplinary significance of systematics, with contributions which address the implications of other fields for systematics, or which advance our understanding of other fields through taxonomic knowledge, especially in relation to the nature, origins, and conservation of biodiversity, at all taxonomic levels. The journal does not publish single species descriptions, monographs or applied research nor alpha species descriptions. Taxonomic manuscripts must include modern methods such as cladistics or phylogenetic analysis.