Order Coleoptera Linnaeus, 1758 - beetles
   Family group Palpicornia see Series Scarabaeiformia Crowson, 1960
     Family Hydraenidae Mulsant, 1844
       1 Genus Hydraena Kugelan, 1794
       2 Genus Ochthebius Leach, 1815
       3 Genus Limnebius Leach, 1815
       4 Genus Hydrochus Leach, 1817
       5 Genus Helophorus Fabricius, 1775