Order Coleoptera Linnaeus, 1758 - beetles
   Family group Adephaga Clairville, 1806 see Suborder Adephaga Schellenberg, 1806
     Family Dytiscidae Leach, 1815 - predaceous diving beetles
       Subfamily Hydroporinae Aubé, 1836
         Genus Hygrotus Stephens, 1828