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 Opisthorchiida
                 Suborder Opisthorchiata La Rue, 1957
                   Superfamily Opisthorchioidea Looss, 1899
                     Family Heterophyidae Odhner, 1914
                       Genus Heterophyes Cobbold, 1866
                         Heterophyes heterophyes (Siebold, 1853)