Class Hirudinea Lamarck, 1818 - leeches see Subclass Hirudinida
   Subclass Euhirudinea Lukin, 1956 - true leeches see Subclass Hirudinida
     Order Rhynchobdellida Blanchard, 1894
       Family Piscicolidae Johnston, 1865
         1 Subfamily Piscicolinae Llewellyn, 1966
         2 Subfamily Platybdellinae Epshtein, 1970
         3 Subfamily Pontobdellinae Caballero, 1956