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 Digenea Carus, 1863
               Order Strigeidida
                 Suborder Brachylaimata
                   Superfamily Brachylaimoidea Joyeux & Foley, 1930
                     01 Family Brachylaimidae Joyeux & Foley, 1930
                     02 Family Leucochloridiidae Poche, 1907
                     03 Family Leucochloridiomorphidae Yamaguti, 1958
                     04 Family Hasstilesiidae Hall, 1916
                     05 Family Liolopidae Odhner, 1912
                     06 Family Urotrematidae
                     07 Family Harmotrematidae (Yamaguti, 1933) Mehra, 1962
                     08 Family Moreauiidae Johnstone, 1915
                     09 Family Ovariopteridae V.A. Leonov et al., 1963
                     10 Family Thapariellidae Srivastava, 1955