Taxon classification Animalia Coleoptera Hydraenidae

Genus Hydraena Kugelann, 1794

Hydraena Kugelann, 1794: 578. Type species Hydraena riparia Kugelann, 1794.

Diagnosis.

Labral-mandibular interlocking device present. Mentum (Fig. 8) with acute median projection on anterior part. Sensilla various and complex. Features of the secretion delivery system specialized ( Jäch et al. 2000).

Key to the subgenera of South Korean Hydraena