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 Fellodistomatoidea (Woolcock, 1912) LaRue, 1957
                     1 Family Fellodistomatidae Woolcock, 1912
                     2 Family Monascidae
                     3 Family Monodhelminthidae Dollfuss, 1937
                     4 Family Gymnophallidae Dollfus, 1939
                     5 Family Botulisaccidae Yamaguti, 1971