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 Strigeata
                   Superfamily Strigeoidea
                     1 Family Strigeidae Railliet, 1919
                     2 Family Diplostomatidae Poirier, 1886
                     3 Family Cyathocotylidae Poche, 1926
                     4 Family Proterodiplostomatidae (G. Dubois, 1936)
                     5 Family Ophiodiplostomatidae
                     6 Family Neostrigeidae B. Bisseru, 1956
                     7 Family Bolbocephalodidae Strand, 1935
                     8 Family Brauninidae Wolf, 1903