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Evolutionary units delimitation and continental multilocus phylogeny of the hyperdiverse catfish genus Hypostomus.
Molecular Phylogenetics and Evolution ( IF 3.6 ) Pub Date : 2019-12-16 , DOI: 10.1016/j.ympev.2019.106711 Luiz Jardim de Queiroz 1 , Yamila Cardoso 2 , Cécile Jacot-des-Combes 1 , Ilham Anne Bahechar 1 , Carlos Alberto Lucena 3 , Lucia Rapp Py-Daniel 4 , Luisa Maria Sarmento Soares 5 , Stephan Nylinder 6 , Claudio Oliveira 7 , Thiago Estevam Parente 8 , Gislene Torrente-Vilara 9 , Raphaël Covain 10 , Paulo Buckup 11 , Juan I Montoya-Burgos 1
Molecular Phylogenetics and Evolution ( IF 3.6 ) Pub Date : 2019-12-16 , DOI: 10.1016/j.ympev.2019.106711 Luiz Jardim de Queiroz 1 , Yamila Cardoso 2 , Cécile Jacot-des-Combes 1 , Ilham Anne Bahechar 1 , Carlos Alberto Lucena 3 , Lucia Rapp Py-Daniel 4 , Luisa Maria Sarmento Soares 5 , Stephan Nylinder 6 , Claudio Oliveira 7 , Thiago Estevam Parente 8 , Gislene Torrente-Vilara 9 , Raphaël Covain 10 , Paulo Buckup 11 , Juan I Montoya-Burgos 1
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With 149 currently recognized species, Hypostomus is one of the most species-rich catfish genera in the world, widely distributed over most of the Neotropical region. To clarify the evolutionary history of this genus, we reconstructed a comprehensive phylogeny of Hypostomus based on four nuclear and two mitochondrial markers. A total of 206 specimens collected from the main Neotropical rivers were included in the present study. Combining morphology and a Bayesian multispecies coalescent (MSC) approach, we recovered 85 previously recognized species plus 23 putative new species, organized into 118 'clusters'. We presented the Cluster Credibility (CC) index that provides numerical support for every hypothesis of cluster delimitation, facilitating delimitation decisions. We then examined the correspondence between the morphologically identified species and their inter-specific COI barcode pairwise divergence. The mean COI barcode divergence between morphological sisters species was 1.3 ± 1.2%, and only in 11% of the comparisons the divergence was ≥2%. This indicates that the COI barcode threshold of 2% classically used to delimit fish species would seriously underestimate the number of species in Hypostomus, advocating for a taxon-specific COI-based inter-specific divergence threshold to be used only when approximations of species richness are needed. The phylogeny of the 108 Hypostomus species, together with 35 additional outgroup species, confirms the monophyly of the genus. Four well-supported main lineages were retrieved, hereinafter called super-groups: Hypostomus cochliodon, H. hemiurus, H. auroguttatus, and H. plecostomus super-groups. We present a compilation of diagnostic characters for each super-group. Our phylogeny lays the foundation for future studies on biogeography and on macroevolution to better understand the successful radiation of this Neotropical fish genus.
中文翻译：
超多样性cat鱼属Hypostomus的进化单位定界和大陆多基因组系统发育。
Hypostomus拥有149个目前公认的物种，是世界上物种最丰富的cat鱼属之一，广泛分布于新热带地区的大部分地区。为了阐明该属的进化史，我们基于四个核标记和两个线粒体标记重建了海带属的综合系统发育。从本研究中总共收集了从主要的新热带河流收集的206个标本。结合形态学和贝叶斯多物种合并（MSC）方法，我们回收了85个先前公认的物种以及23个推定的新物种，这些物种被组织为118个“集群”。我们提出了集群可信度（CC）指数，该指数为集群定界的每个假设提供了数值支持，有助于进行定界决策。然后，我们检查了形态学上已识别的物种与其种间COI条码成对散度之间的对应关系。形态姐妹物种之间的平均COI条码差异为1.3±1.2％，仅在11％的比较中差异≥2％。这表明传统上用于划定鱼类种类的COI条码阈值2％会严重低估Hypostomus中的物种数量，提倡仅基于物种丰富度的近似值才能使用基于分类单元的基于COI的种间差异阈值。需要。108个Hyposomus物种的系统发育以及35个其他外群物种证实了该属的单性。检索到四个受支持的主要谱系，以下称为超群：Hypostomus cochliodon，H。hemiurus，H。auroguttatus，和plecostomus超群。我们为每个超级组提供了诊断字符的汇编。我们的系统进化论为以后的生物地理学和宏观进化研究奠定了基础，以便更好地了解这种新热带鱼类属的成功辐射。
更新日期：2019-12-17
中文翻译：
超多样性cat鱼属Hypostomus的进化单位定界和大陆多基因组系统发育。
Hypostomus拥有149个目前公认的物种，是世界上物种最丰富的cat鱼属之一，广泛分布于新热带地区的大部分地区。为了阐明该属的进化史，我们基于四个核标记和两个线粒体标记重建了海带属的综合系统发育。从本研究中总共收集了从主要的新热带河流收集的206个标本。结合形态学和贝叶斯多物种合并（MSC）方法，我们回收了85个先前公认的物种以及23个推定的新物种，这些物种被组织为118个“集群”。我们提出了集群可信度（CC）指数，该指数为集群定界的每个假设提供了数值支持，有助于进行定界决策。然后，我们检查了形态学上已识别的物种与其种间COI条码成对散度之间的对应关系。形态姐妹物种之间的平均COI条码差异为1.3±1.2％，仅在11％的比较中差异≥2％。这表明传统上用于划定鱼类种类的COI条码阈值2％会严重低估Hypostomus中的物种数量，提倡仅基于物种丰富度的近似值才能使用基于分类单元的基于COI的种间差异阈值。需要。108个Hyposomus物种的系统发育以及35个其他外群物种证实了该属的单性。检索到四个受支持的主要谱系，以下称为超群：Hypostomus cochliodon，H。hemiurus，H。auroguttatus，和plecostomus超群。我们为每个超级组提供了诊断字符的汇编。我们的系统进化论为以后的生物地理学和宏观进化研究奠定了基础，以便更好地了解这种新热带鱼类属的成功辐射。
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