Scaphisoma unicolor

Ivan Löbl & Ryo Ogawa, 2016, On the Scaphisomatini (Coleoptera, Staphylinidae, Scaphidiinae) of the Philippines, IV: the genera Sapitia ACHARD and Scaphisoma LEACH, Linzer biologische Beiträge 48 (2), pp. 1339-1492 : 1389

5.2.13. The Scaphisoma unicolor species group

The group was established for two Japanese species ( LÖBL 1970b). It includes at present a number of Asian species. They possess aedeagi with asymmetrical, narrow and elongate median lobe, usually have robust, prominent articular process and a small basal bulb. The parameres may be symmetrical or asymmetrical, usually lacking membranous lobes, and the internal sac is simple, consisting of a long flagellum, often to part extruded in repos.