Scaphisoma subconvexum

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 : 1352

5.2.2. The Scaphisoma subconvexum species group

Members of the group share fused or reduced mesepimera, in combination with comparatively weakly convex body, irregular, to part coarsely and densely punctate elytra, and usually large submetacoxal areas. The aedeagi are moderately sclerotized and symmetrical, with articular process usually prominent, and the internal sac simple, lacking flagellum and sclerotized pieces. The following Philippine species placed within this group: S. simplex, S. simplexides, S. subconvexum, S. subgracile, S. subplanatum, and S. subpunctum.