Osmylus angustimarginatus sp. n. a–e Male: a apex of the abdomen and genitalia b genitalia, lateral view c genitalia, dorsal view d mediuncus, lateral view e mediuncus, dorsal view f–h Female: f apex of the abdomen and genitalia g subgenital plate, ventral view h spermatheca, lateral view. Abbreviations: dp, dorsal process; vm, ventral margin.