living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Platyhelminthes Gegenbaur, 1859 - flatworms
           Class Trematoda Rudolphi, 1808 - flukes see Infraclass Trematoda Rudolphi, 1808
             Subclass Monogenea Carus, 1863 see Infraclass Monogenea
               Suborder Polyopisthocotylea Odhner, 1912 see Subclass Polyopisthocotylea
                 Superfamily Diclidophoroidea Fuhrmann, 1928
                   01 Family Diclidophoridae Fuhrmann, 1928
                   02 Family Mazocraeidae Price, 1936
                   03 Family Pterinotrematidae Bychowsky & Nagibina, 1959
                   04 Family Discocotylidae Price, 1936
                   05 Family Plectanocotylidae Monticelli, 1903
                   06 Family Dactylocotylidae
                   07 Family Protomicrocotylidae Johnston & Tiegs, 1922
                   08 Family Octolabeidae Yamaguti, 1963
                   09 Family Macrovalvitrematidae Yamaguti, 1963
                   10 Family Hexostomatidae Price, 1936
                   11 Family Pseudodiclidophoridae Yamaguti, 1965