Phylogenetic analyses testing the monophyly of the tribe Hydrobiusini and the relationships among its genera are performed based on a data matrix including characters of larval morphology and morphometrics, larval chaetotaxy and adult morphology, including eight of the nine hydrobiusine genera plus 15 outgroup taxa. The head chaetotaxy of six genera of the tribe Hydrobiusini is described (Ametor, Hybogralius, Hydramara, Limnohydrobius, Limnoxenus and Sperchopsis). Morphometric characters derived from the head capsule and mouthparts are included. All characters are illustrated in detail. The analyses performed on the above datasets and their combinations reveal the monophyly of the Hydrobiusini except for Hybogralius, and reconstruct the internal topology of the tribe, largely corresponding to results of previous molecular analyses. Hybogralius groups with genera having larvae adapted to underwater feeding in all analyses. The position of the genus Tritonus within the Laccobiini is questioned by our analyses, which suggest a closer relationship with the tribes Hydrophilini or Hydrobiusini. Larval characters are revealed as highly homoplastic, with chaetotaxic characters performing slightly worse than usual larval morphology. Nonetheless, they are phylogenetically informative and useful for testing phylogenetic hypotheses resulting from analyses of molecules or adult morphology. A key to larvae of the genera of the Hydrobiusini is presented.

中文翻译：

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在 Hydrobiusini 水清道夫甲虫（鞘翅目：亲水科）中，幼虫 chaetotaxy 和形态学是高度同质但系统发育信息丰富的

系统发育分析测试了 Hydrobiusini 部落的单系及其属之间的关系，这是基于一个数据矩阵进行的，该矩阵包括幼虫形态特征和形态计量学、幼虫毛状体和成虫形态，包括 9 个 Hydrobiusine 属中的 8 个和 15 个外群分类群。描述了Hydrobiusini部落的六个属 ( Ametor , Hybogralius , Hydramara , Limnohydrobius , Limnoxenus和Sperchopsis ) 的头部 chaetotaxy）。包括来自头囊和口器的形态特征。所有的人物都有详细的说明。对上述数据集及其组合进行的分析揭示了除 Hybogralius 之外的Hydrobiusini 的单一性，并重建了部落的内部拓扑结构，很大程度上对应于先前的分子分析结果。在所有分析中，具有适应水下觅食的幼虫的属的Hybogralius群体。Tritonus属的位置我们的分析对 Laccobiini 内的人提出了质疑，这表明与 Hydrophilini 或 Hydrobiusini 部落有更密切的关系。幼虫特征显示为高度同质性，具有趋毛性特征的表现略差于通常的幼虫形态。尽管如此，它们在系统发育方面具有丰富的信息，可用于测试由分子或成体形态分析得出的系统发育假设。介绍了 Hydrobiusini 属的幼虫的关键。