Scaphisoma binaluanum

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 : 1363

5.2.7. The Scaphisoma binaluanum species group

The members of this group possess symmetrical aedeagi with distinct articular processes and narrow apical processes of the median lobe, parameres lacking membranous lobes and internal sacs tubular, often very long and convoluted, lacking flagellum or sclerites (e.g., as in the Sulawesian S. bugi LÖBL, 1983 and in S. invertum LÖBL, 2000 from Sichuan). Three species, S. binaluanum, S. lunabianum and S. nabiluanum share most diagnostic characters, including a conspicuous colour patter. The following Philippine species: S. apomontium, S. bolmarum, S. casiguran, S. compactum, S. deharvengi, S. densepunctatum, S. hexamerum, S. kodadai, S. maculosum, S. maramag, S. minutipenis, S. sagax, S. subanun, and S. subfasciatum possess similar aedeagi as S. binaluanum, but differs in external characters and are therefore placed tentatively within this group.