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 Echinostomida LaRue, 1957
                 Suborder Paramphistomata
                   Superfamily Paramphistomatoidea Fischoeder, 1901 see Superfamily Paramphistomoidea Fischoeder, 1901
                     Family Paramphistomatidae Fischoeder, 1901 see Family Paramphistomidae Fischoeder, 1901
                       Genus Megalodiscus Chandler, 1923
                         Megalodiscus temperatus (Stafford, 1905) Harwood, 1932