Metazoa Haeckel 1874 - multicellular animals see Kingdom Animalia Linnaeus, 1758
   Phylum Platyhelminthes Gegenbaur, 1859 - flatworms
     Class Trematoda Rudolphi, 1808 - flukes see Infraclass Trematoda Rudolphi, 1808
       Order Monogenea see Infraclass Monogenea
         Suborder Polyopisthocotylea Odhner, 1912 see Subclass Polyopisthocotylea
           Superfamily Diclidophoroidea Fuhrmann, 1928
             1 Family Mazocraëidae Price, 1936 see Family Mazocraeidae Price, 1936
             2 Family Discocotylidae Price, 1936
             3 Family Microcotylidae Taschenberg, 1879
             4 Family Gastrocotylidae Price, 1943
             5 Family Diclidophoridae Fuhrmann, 1928
             6 Family Hexostomatidae Price, 1936