Notes on Dineutus helleri Ochs, 1925, with new records for the Cyclops Mountains Whirligig Beetle, Dineutus h. stueberi Ochs, 1955 (Coleoptera, Gyrinidae)

We review Dineutus helleri Ochs, 1925, a whirligig beetle species endemic to New Guinea’s north coast mountains. Its diagnostic characters are illustrated for easy species identification. We provide a summary and geographic interpretation of historical records, provide new records and, for the first time, habitat photographs for the subspecies D. h. stueberi Ochs, 1955, which is endemic to the Cyclops Mountains area. We also discuss the subspecies classification of this species