Integrative taxonomy, phylogenetics and historical biogeography of subgenus Aeschyntelus Stål, 1872 (Hemiptera: Heteroptera: Rhopalidae)

IF 3.6 1区 生物学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY Molecular Phylogenetics and Evolution Pub Date : 2024-06-06 DOI:10.1016/j.ympev.2024.108121
Juhong Chen , Kun Jiang , Tianyi Qi , Yanfei Li , Huaxi Liu , Huaijun Xue , Zhen Ye , Shujing Wang , Wenjun Bu
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Abstract

The subgenus Aeschyntelus includes six species that show variations in body color and shape, thus making it difficult to identify them based on morphological identification alone. To date, no genetic study has evaluated species within this genus. Herein, we collected 171 individuals from 90 localities of Rhopalus and employed an integrative taxonomic approach that incorporated morphological data, mitochondrial genomic data (COI, whole mitochondrial data) and nuclear genomic data (18S + 28S rRNAs, nuclear genome-wide SNPs) to delineate species boundaries. Our analyses confirmed the status of nine described species of Rhopalus and proposed the recognition of one new species known as Rhopalus qinlinganus sp. nov., which is classified within the subgenus Aeschyntelus. Discrepancies arising from nuclear and mitochondrial data suggest the presence of mito-nuclear discordance. Specifically, mitochondrial data indicated admixture within Clade A, comprising R. kerzhneri and R. latus, whereas genome-wide SNPs unambiguously identified two separate species, aligning with morphological classification. Conversely, mitochondrial data clearly distinguished Clade B- consisting of R. sapporensis into two lineages, whereas genome-wide SNPs unequivocally identified a single species. Our study also provides insights into the evolutionary history of Aeschyntelus, thus indicating that it likely originated in East Asia during the middle Miocene. The development of Aeschyntelus biodiversity in the southwestern mountains of China occurred via an uplift-driven diversification process. Our findings highlight the necessity of integrating both morphological and multiple molecular datasets for precise species identification, particularly when delineating closely related species. Additionally, it reveals the important role of mountain orogenesis on speciation within the southwestern mountains of China.

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亚属 Aeschyntelus Stål, 1872(半翅目:异型昆虫纲:Rhopalidae)的综合分类学、系统发生学和历史生物地理学。
Aeschyntelus 亚属包括六个物种,这些物种的体色和体形各不相同,因此很难仅凭形态鉴定来识别它们。迄今为止,还没有基因研究对该属的物种进行评估。在本文中,我们从 Rhopalus 的 90 个地点收集了 171 个个体,并采用了综合分类方法,结合形态学数据、线粒体基因组数据(COI、全线粒体数据)和核基因组数据(18S + 28S rRNAs、核全基因组 SNPs)来划分物种边界。我们的分析确认了 9 个已描述的 Rhopalus 物种的地位,并提议确认一个新物种,即 Rhopalus qinlinganus sp.nov.,将其归入 Aeschyntelus 亚属。核与线粒体数据的不一致表明存在有丝分裂与核分裂不一致的现象。具体来说,线粒体数据表明,在由 R. kerzhneri 和 R. latus 组成的支系 A 中存在混杂现象,而全基因组 SNP 则明确指出了两个独立的物种,与形态学分类一致。相反,线粒体数据清楚地将由 R. sapporensis 组成的支系 B 区分为两个世系,而全基因组 SNP 则明确地确定了一个物种。我们的研究还揭示了Aeschyntelus的进化历史,从而表明它很可能起源于中新世中期的东亚。Aeschyntelus生物多样性在中国西南山区的发展经历了一个隆升驱动的多样化过程。我们的研究结果突显了整合形态学和多种分子数据集进行精确物种鉴定的必要性,尤其是在划分近缘物种时。此外,它还揭示了山地造山运动对中国西南山区物种分化的重要作用。
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来源期刊
Molecular Phylogenetics and Evolution
Molecular Phylogenetics and Evolution 生物-进化生物学
CiteScore
7.50
自引率
7.30%
发文量
249
审稿时长
7.5 months
期刊介绍: Molecular Phylogenetics and Evolution is dedicated to bringing Darwin''s dream within grasp - to "have fairly true genealogical trees of each great kingdom of Nature." The journal provides a forum for molecular studies that advance our understanding of phylogeny and evolution, further the development of phylogenetically more accurate taxonomic classifications, and ultimately bring a unified classification for all the ramifying lines of life. Phylogeographic studies will be considered for publication if they offer EXCEPTIONAL theoretical or empirical advances.
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