A new species of Copelatus erichson, 1832 (Coleoptera: Dytiscidae: Copelatinae) from the Adelbert Range of Papua New Guinea

Abstract

We describe Copelatus adelbert sp. n., the first member of the Copelatus hydroporoides group from the Australian Region. The species is endemic to the Adelbert Range in Papua New Guinea. In addition to lacking striae on elytra (character of the O. hydroporoides group), Copelatus adelbert sp. n. is very characteristic due to its colouration, with bright contrasting transversal, basal and apical orange bands on the otherwise dark elytron. Habitus and median lobe of the new species are illustrated and notes on the habitat are provided.