State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, and Centre for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, China; School of Earth Sciences, University of Bristol, Life Sciences Building, Tyndall Avenue, Bristol BS8 1TQ, UK.
Department of Animal Science, Hartpury College, Hartpury GL19 3BE, UK.
Mol Phylogenet Evol. 2020 Jun;147:106782. doi: 10.1016/j.ympev.2020.106782. Epub 2020 Mar 5.
Diving beetles and their allies are an almost ubiquitous group of freshwater predators. Knowledge of the phylogeny of the adephagan superfamily Dytiscoidea has significantly improved since the advent of molecular phylogenetics. However, despite recent comprehensive phylogenomic studies, some phylogenetic relationships among the constituent families remain elusive. In particular, the position of the family Hygrobiidae remains uncertain. We address these issues by re-analyzing recently published phylogenomic datasets for Dytiscoidea, using approaches to reduce compositional heterogeneity and adopting a site-heterogeneous mixture model. We obtained a consistent, well-resolved, and strongly supported tree. Consistent with previous studies, our analyses support Aspidytidae as the monophyletic sister group of Amphizoidae, and more importantly, Hygrobiidae as the sister of the diverse Dytiscidae, in agreement with morphology-based phylogenies. Our analyses provide a backbone phylogeny of Dytiscoidea, which lays the foundation for better understanding the evolution of morphological characters, life habits, and feeding behaviors of dytiscoid beetles.
潜水甲虫及其亲缘关系物种是一种几乎无处不在的淡水捕食者。自从分子系统发生学出现以来，关于多食甲总科的系统发育知识已经有了显著的提高。然而，尽管最近进行了全面的系统基因组学研究，但一些组成科之间的系统发育关系仍然难以捉摸。特别是 Hygrobiidae 科的位置仍然不确定。我们通过重新分析最近发表的 Dytiscoidea 系统基因组数据集来解决这些问题，采用了减少组成异质性的方法，并采用了位点异质混合模型。我们得到了一个一致的、分辨率高的、支持力度很强的树。与之前的研究一致，我们的分析支持 Aspidytidae 是 Amphizoidae 的单系姐妹群，更重要的是，Hygrobiidae 是多样化的 Dytiscidae 的姐妹群，这与基于形态的系统发育学一致。我们的分析提供了 Dytiscoidea 的骨干系统发育，为更好地理解多食甲科甲虫的形态特征、生活习性和取食行为的进化奠定了基础。
