Lachninae (Insecta: Aphididae) represent a fascinating group of aphids that are traditionally divided into five tribes. Among these, members of the tribe Tuberolachnini exhibit remarkable morphological and biological diversity. One genus of this group, Miyalachnus, known from Japan, is characterized by unique features. Our study aimed to re-examine the tribal classification within Lachninae, with a focus on the diverse Tuberolachnini and the previously understudied genera Miyalachnus and Sinolachnus. We conducted a comprehensive phylogenetic analysis using four genes (COI, COII, CytB, and EF1α), employing both maximum likelihood (ML) and Bayesian inference (BI) methods on a combined dataset. Our findings challenge the monophyly of Tuberolachnini. The analyses revealed that Miyalachnus and Sinolachnus are phylogenetically distinct from the core Tuberolachnini genera (Nippolachnus, Pyrolachnus, and Tuberolachnus), instead showing a closer relationship with Tramini. Specifically, the Miyalachnus clade forms a sister clade to the clade containing Sinolachnus and Tramini. On the basis of these molecular results, corroborated by morphological evidence, we propose to erect a new tribe within the Lachninae-Miyalachnini trib. nov. with Miyalachnus as the type genus. We also provide updated taxonomic diagnoses for the remaining tribes and discuss their relationships as well as distinguishing features.

中文翻译：

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Tuberolachnini 和 Lachninae （Insecta， Hemiptera） 的系统发育重建：形态学和分子分析揭示了一个新的部落


Lachninae（昆虫：蚜虫科）代表了一组迷人的蚜虫，传统上分为五个部落。其中，Tuberolachnini 部落的成员表现出显着的形态和生物多样性。该组的一个属，Miyalachnus，已知于日本，具有独特的特征。我们的研究旨在重新检查 Lachninae 内的部落分类，重点是多样化的 Tuberolachnini 和以前研究不足的属 Miyalachnus 和 Sinolachnus。我们使用四个基因 （COI 、 COII 、 CytB 和 EF1α） 进行了全面的系统发育分析，在组合数据集上采用了最大似然 （ML） 和贝叶斯推理 （BI） 方法。我们的发现挑战了 Tuberolachnini 的单系性。分析表明，Miyalachnus 和 Sinolachnus 在系统发育上与核心 Tuberolachnini 属 （Nippolachnus、Pyrolachnus 和 Tuberolachnus） 不同，而是与 Tramini 关系更密切。具体来说，Miyalachnus 分支与包含 Sinolachnus 和 Tramini 的分支形成姊妹分支。根据这些分子结果，并得到形态学证据的证实，我们建议在 Lachninae-Miyalachnini 部落中建立一个新的部落。以 Miyalachnus 为类型属。我们还为其余部落提供了最新的分类诊断，并讨论了它们的关系和区别特征。