Curiously, this individual is very similar to the Diastosphya genus from Fiji (I have a specimen in my collection). It seems to me that there is a genus or two in Papua?
Yes, there are two genera (Oloessa and Haplorhabdus) each with only one species in Papua, but Oloessa is different, and H. nymani Auriv. I don't know, maybe anybody has a type picture from the last one.