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 Plagiorchiida La Rue, 1957
                 Suborder Plagiorchiata
                   Superfamily Plagiorchioidea (Luhe) Dollfus
                     01 Family Plagiorchiidae Lühe, 1901
                     02 Family Haematoloechidae Freitas & Lent, 1939
                     03 Family Macroderoididae McMullen, 1937
                     04 Family Brachycoeliidae Johnston, 1912
                     05 Family Mesocoeliidae Faust, 1924
                     06 Family Cephalogonimidae Looss, 1899
                     07 Family Auridistomatidae
                     08 Family Rhytidodidae Odhner, 1926
                     09 Family Calycodidae Dollfus, 1929
                     10 Family Pachypsolidae Yamaguti, 1958
                     11 ?Family Omphalometridae
                     12 ?Family Encyclometridae Mehra, 1931
                     13 ?Family Cephaloporidae