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 Azygiida Schell, 1982
                 Suborder Hemiurata Skrjabin & Guschanskaja, 1954
                   Superfamily Hemiuroidea Faust, 1929
                     01 Family Hemiuridae Lühe, 1901
                     02 Family Halipegidae Poche, 1926
                     03 Family Bathycotylidae Dollfus, 1932
                     04 Family Botulidae
                     05 Family Ptychogonimidae Dollfus, 1936
                     06 Family Hirudinellidae Dollfus, 1932
                     07 Family Sclerodistomatidae
                     07 Family Sclerodistomidae Odhner, 1927 see Family Sclerodistomatidae
                     08 Family Mabiaramidae
                     09 Family Prosogonotrematidae I. Perez Vigueras, 1940
                     10 Family Oesophagicolidae H.R. Mehra, 1962
                     11 Family Arnolidae H.R. Mehra, 1962
                     12 Family Lampritrematidae
                     13 Family Lobatovitelliovaridae see Family Lobatovitelliovariidae
                     13 Family Lobatovitelliovariidae
                     14 Family Syncoeliidae Looss, 1899