Molecular phylogeny and classification of Chelidurella Verhoeff, stat. restit. (Dermaptera: Forficulidae)

<p>We present herein the first phylogenetic analysis of the genus <i>Chelidura</i> and the taxonomic revision of the genus <i>Chelidurella</i>, <b>stat. restit.</b>, based on DNA sequences. The results confirm the generic status of <i>Chelidurella</i> Verhoeff, 1902 and <i>Mesochelidura</i> Verhoeff, 1902, and they are removed from the synonymy with <i>Chelidura</i> and reinstated as valid genera. Many individual <i>Chelidurella</i> species are defined based on the combination of a few variable characters on the pygidium and forceps, and the systematics and phylogeny of this genus are unclear. The validity of most of the species is revisited here by molecular phylogenetic analyses, and individual morphological characters are evaluated for their relevance in the identification of all described species. We describe two new species to science, Chelidurella galvagnii Kirstová & Kočárek, sp. nov. from Austria, and C. pseudovignai Kočárek & Kirstová, sp. nov. from Italy and Austria; two species, C. guentheri Galvagni, 1994, and C. tatrica Chládek, 2017 are newly synonymized. Critical diagnostic characters are illustrated, and an identification key for males of <i>Chelidurella</i> is provided.</p>