A new species of the genus Donacia Fabricius (Coleoptera, Chrysomelidae, Donaciinae) from South Korea: morphology, ecology, and COI gene analysis

<i>Donacia koreana</i> <b>sp. nov.</b> is described from South Korea, with detailed descriptions and illustrations of both the adult and larval stages. A key for species identification, distribution map, host plant associations, oviposition behaviors, feeding patterns, and other ecological information, along with partial sequences of mitochondrial cytochrome c oxidase subunit I, are also presented.