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<p>Recently, the taxonomy of <i>Dichotomius</i> Hope, 1838 (Coleoptera: Scarabaeidae: Scarabaeinae) was updated, a new species group division was proposed, and the <i>Dichotomius depressicollis</i> (Harold, 1867) species group was created. Based on the external morphology and the male genitalia of all type material and 1443 specimens deposited in eight entomological collections, the taxonomic revision of this group is carried out. The group contains eight species, five of which are new: <i>Dichotomius audinoae</i> <b>sp. nov.</b> (Brazil), <i>Dichotomius barberoi</i> <b>sp. nov.</b> (Brazil), <i>Dichotomius davidedmondsi</i> <b>sp. nov.</b> (Bolivia), <i>Dichotomius depressicollis</i> (Harold, 1867) (Argentina and Brazil), <i>Dichotomius inca</i> <b>sp. nov.</b> (Peru), <i>Dichotomius melzeri</i> (Luederwaldt, 1922) (Bolivia, Brazil, and Peru), <i>Dichotomius salomaoi</i> <b>sp. nov.</b> (Brazil), and <i>Dichotomius zikani</i> (Luederwaldt, 1922) (Bolivia and Brazil). Lectotypes were designated for <i>Pinotus depressicollis</i> Harold, 1867, <i>Pinotus melzeri</i> Luederwaldt, 1922, and <i>Pinotus zikani</i> Luederwaldt, 1922. A complete description of the <i>D. depressicollis</i> species group and a species identification key are presented. For each species, the following information is provided: taxonomic history, description or redescription, list of material examined, photographs of external morphology, male genitalia and its endophallites, and distribution map.</p>

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A Taxonomic Revision of the Dichotomius depressicollis (Harold, 1867) Species Group (Coleoptera: Scarabaeidae: Scarabaeinae), with Description of Five New Species

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  • 发表日期：

    2026年4月8日

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  • JA Arias-Buriticá,
  • FZ Vaz-de-Mello

摘要

Recently, the taxonomy of Dichotomius Hope, 1838 (Coleoptera: Scarabaeidae: Scarabaeinae) was updated, a new species group division was proposed, and the Dichotomius depressicollis (Harold, 1867) species group was created. Based on the external morphology and the male genitalia of all type material and 1443 specimens deposited in eight entomological collections, the taxonomic revision of this group is carried out. The group contains eight species, five of which are new: Dichotomius audinoae sp. nov. (Brazil), Dichotomius barberoi sp. nov. (Brazil), Dichotomius davidedmondsi sp. nov. (Bolivia), Dichotomius depressicollis (Harold, 1867) (Argentina and Brazil), Dichotomius inca sp. nov. (Peru), Dichotomius melzeri (Luederwaldt, 1922) (Bolivia, Brazil, and Peru), Dichotomius salomaoi sp. nov. (Brazil), and Dichotomius zikani (Luederwaldt, 1922) (Bolivia and Brazil). Lectotypes were designated for Pinotus depressicollis Harold, 1867, Pinotus melzeri Luederwaldt, 1922, and Pinotus zikani Luederwaldt, 1922. A complete description of the D. depressicollis species group and a species identification key are presented. For each species, the following information is provided: taxonomic history, description or redescription, list of material examined, photographs of external morphology, male genitalia and its endophallites, and distribution map.