Ancyronyx clisteri, a new Spider Water Beetle species from Borneo and comments on the variability and distribution of A. sarawacensis Jäch with description of the larva using DNA barcodes (Coleoptera: Elmidae). Ancyronyx of Borneo

Ancyronyx clisteri sp.n. (Coleoptera: Elmidae) a new Spider Water Beetle species discovered from Northern Borneo (Sarawak, Brunei, Sabah) and the larva of Ancyronyx sarawacensis Jäch are described. COI mtDNA barcodes are provided for several Ancyronyx species. The differences of the closely related species are discussed based on DNA barcodes and morphological characters. Larva and imago of A. sarawacensis are associated using COI mtDNA. The identity of Ancyronyx procerus Jäch from Peninsular Malaysia is confirmed by COI mtDNA comparison.