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<p>The genus <i>Maculolachnus</i> Gaumont, 1920 (Hemiptera: Aphididae: Lachninae) exhibits substantial hidden diversity, yet its life history remains poorly understood. Here, we present an integrative taxonomic study of <i>Maculolachnus</i> in South Korea, revealing a previously unrecognized species closely related to <i>M</i>. <i>submacula</i> and providing the first biological insights into the group. We combined detailed morphological examinations, mitochondrial COI sequence analyses, and field observations of colony structure and phenology to clarify species boundaries and elucidate life history traits. Populations formerly identified as <i>M</i>. <i>submacula</i> exhibited distinct morphological characters and significant COI divergence. Phylogenetic reconstructions (BI, ML, NJ), species delimitation methods (ABGD, ASAP, bPTP), and haplotype network analyses consistently supported four distinct species: <i>M</i>. <i>submacula</i>, <i>M</i>. <i>sijpkensi</i>, <i>M</i>. <i>paiki</i>, and a new species described herein as <i>Maculolachnus koreanus</i> sp. nov. The COI distance between <i>M</i>. <i>koreanus</i> sp. nov. and <i>M</i>. <i>submacula</i> exceeded 2.4%, surpassing the typical aphid barcode gap. We redescribe the rare alate viviparous female of <i>M</i>. <i>paiki</i>, which is endemic to South Korea. Observations on <i>M</i>. <i>koreanus</i> sp. nov. revealed ant attendance and seasonal reproductive strategies. Scanning electron microscopy (SEM) provided the first detailed characterization of sensorial structures. This study highlights the value of integrative taxonomy in revealing hidden diversity within Lachninae.</p><p>International Commission on Zoological Nomenclature (ICZN). International Code of ZoologicalNomenclature 4th edn, i–xxix, 1–306 (The International Trust for Zoological Nomenclature,1999). urn:lsid:zoobank.org:pub:F4BF9295-FF83-434C-9A29-74FDB7A64A9E</p>

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Integrative taxonomic study reveals a new species of Maculolachnus (Hemiptera: Aphididae) from South Korea

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  • 发表日期：

    2026年3月5日

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  • Minho Lee,
  • Mariusz Kanturski,
  • Seunghwan Lee

摘要

The genus Maculolachnus Gaumont, 1920 (Hemiptera: Aphididae: Lachninae) exhibits substantial hidden diversity, yet its life history remains poorly understood. Here, we present an integrative taxonomic study of Maculolachnus in South Korea, revealing a previously unrecognized species closely related to M. submacula and providing the first biological insights into the group. We combined detailed morphological examinations, mitochondrial COI sequence analyses, and field observations of colony structure and phenology to clarify species boundaries and elucidate life history traits. Populations formerly identified as M. submacula exhibited distinct morphological characters and significant COI divergence. Phylogenetic reconstructions (BI, ML, NJ), species delimitation methods (ABGD, ASAP, bPTP), and haplotype network analyses consistently supported four distinct species: M. submacula, M. sijpkensi, M. paiki, and a new species described herein as Maculolachnus koreanus sp. nov. The COI distance between M. koreanus sp. nov. and M. submacula exceeded 2.4%, surpassing the typical aphid barcode gap. We redescribe the rare alate viviparous female of M. paiki, which is endemic to South Korea. Observations on M. koreanus sp. nov. revealed ant attendance and seasonal reproductive strategies. Scanning electron microscopy (SEM) provided the first detailed characterization of sensorial structures. This study highlights the value of integrative taxonomy in revealing hidden diversity within Lachninae.

International Commission on Zoological Nomenclature (ICZN). International Code of ZoologicalNomenclature 4th edn, i–xxix, 1–306 (The International Trust for Zoological Nomenclature,1999). urn:lsid:zoobank.org:pub:F4BF9295-FF83-434C-9A29-74FDB7A64A9E