Three new species of genus Onycholabis Bates, 1873 (Coleoptera, Carabidae, Platynini) based on morphological and molecular data

Three new species of the genus Onycholabis Bates, 1873 are described, O. hainanus Bolkiboev & Liang, sp. nov. from Hainan; O. tengjhihensis Bolkiboev & Liang, sp. nov., and O. cheni Bolkiboev & Liang, sp. nov. from Taiwan, based on morphological comparisons and molecular analyses. Illustrations of habitus and genitalia with distribution maps are presented for the new species. A key to the nine known Onycholabis species is compiled, and a phylogenetic tree based on the barcode COI is provided.