5. Cephennomicrus tuberculifrons species group

Three species that belong here share an elongate, slender body form, the head of males modified, with modifications restricted to its anterior portion (tubercles on frons in front of eyes or an unusually formed clypeus), indistinctly delimited trimerous antennal club; and the aedeagus in ventral view with rounded sides and a circular ventral diaphragm. This group comprises C. tuberculifrons sp. n., C. semidividus sp. n. and C. longissimus sp. n.