A Revision of the Prionus gahani Species Group (Coleoptera: Cerambycidae: Prioninae: Prionini)

This study contributes to the taxonomic research on the “Prionus gahani” species group, which includes six species. A new species, Prionus zhumingyui Lin & Drumont, sp. nov., is described from Guangdong Province, China. The new species is distinguished by having pronotum longer, antennomere III with obvious apical lobe more stretched outward and cone-shaped. Illustrations of the habitus and genitalia of the new species and other four species are provided. The habitats and collecting experiences of four species are provided: P. zhumingyui Lin & Drumont, sp. nov., P. sontinh Do, Drumont & Komiya, 2019 (with new locality information), P. antonkozlovi Drumont & Komiya, 2021, and P. gahani Lameere, 1912 (with female described for the first time). It is concluded that the species of this group are diurnal, although they have somber colors. Their small compound eyes (especially compared with other Prionus species, which have large compound eyes and are attracted to light) are well-matched to their diurnal lifestyle.