[Order] Coleoptera Linnaeus, 1758 - beetles
   Suborder Myxophaga Crowson, 1955 - skiff beetles
     Family Hydroscaphidae LeConte, 1874
       Genus Hydroscapha LeConte, 1874
         1 Hydroscapha natans LeConte, 1874
         2 Hydroscapha granulum (Motschulsky)
         3 Hydroscapha redfordi Maier, Ivie, Johnson & Maddison, 2010