Class Hirudinea Lamarck, 1818 - leeches see Subclass Hirudinida
   Subclass Euhirudinea Lukin, 1956 - true leeches see Subclass Hirudinida
     Order Arhynchobdellida Blanchard, 1894
       Suborder Erpobdelliformes
         1 Family Erpobdellidae Blanchard, 1894
         2 Family Salifidae Johansson, 1910