Members of the Monoctonina subtribe have long been neglected in applied studies of the subfamily Aphidiinae, due to their low economic importance, as they do not parasitize pests of cultivated plants. Consequently, data about this group are scarce, including its taxonomy and phylogeny. In the present study, we explore inter- and intraspecific genetic variation of Monoctonina species, including genera Monoctonus Haliday 1833, Monoctonia Starý 1962, Falciconus Mackauer 1959 and Harkeria Cameron 1900. We employ two molecular markers, the barcode region of the mitochondrial cytochrome c oxidase subunit I (COI) and the D2 region of the 28S nuclear gene (28S rDNA), to analyze genetic structuring and phylogeny of all available Monoctonina species, and combine them with morphological data for an integrative approach. We report one new species, and three potentially new species which can be formally described when further specimens are available. Analysis of phylogenetic relationships within the subtribe shows a basal position for the genera Falciconus and Monoctonia, and the close relatedness of Harkeria and Monoctonus.

中文翻译：

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亚群Monoctonina（膜翅目，Bra科，蚜虫）的系统发育。

蚜虫亚科的成员长期以来一直在蚜虫亚科的应用研究中被忽略，因为它们的经济重要性不高，因为它们不会寄生栽培植物的害虫。因此，关于这一群体的数据很少，包括其分类学和系统发育。在本研究中，我们探讨了Monoctonina物种的种间和种内遗传变异，包括Monoctonus Haliday属，MonoctoniaStarý1962，Falciconus Mackauer 1959和Harkeria Cameron1900。我们使用两个分子标记，即线粒体细胞色素c氧化酶的条形码区域I亚基（COI）和28S核基因（28S rDNA）的D2区，分析所有可用Monoctonina物种的遗传结构和系统发育，并将它们与形态学数据结合起来进行整合。我们报告了一个新物种，还有三个潜在的新物种，可以在有更多标本时正式描述。对亚族内部系统发育关系的分析表明，Falciconus和Monoctonia属的基础地位，以及H​​arkeria和Monoctonus的密切相关性。