5.2.11. The Scaphisoma sexuale species group

This group is characterized by very narrow, elongate aedeagus with parameres extended proximally to surround the basal bulb and lacking apical membranous apophyses. The internal sac is simple, tubular. It contains a single Philippine species. The Australian S. funereum LÖBL, 1977, S. leai LÖBL, 1977 and S. glabripenne LÖBL, 1977 have similar median lobes of the aedeagi, simple internal sacs and parameres extended proximally, but differ by the membranous apical parameral apophyses (LÖBL 1977a).