3. Cephennomicrus mediorugosus species group

Three species that belong here share a modified frons in males, with modifications restricted to the posterior half of head and composed of median carina or tubercle; sharply delimited dimerous and strongly flattened antennal club; and the aedeagus with paired bunches of dense, needle-like sclerites flanking simple, uncoiled flagellum, and subapical region of dorsal wall bearing paired setae. This group includes C. mediorugosus sp. n., C. wunundarranus sp. n. and C. carinatus sp. n.