living organisms
   Superkingdom Eukaryotae
     Kingdom Animalia [Linnaeus, 1758]
       Subkingdom Eumetazoa [Butschli, 1910]
         Phylum Platyhelminthes [Gegenbaur, 1859]
           Class Trematoda [Rudolphi, 1808]
             Subclass Digenea [Carus, 1863]
               Order Plagiorchiida [La Rue, 1957]
                 Suborder Plagiorchiata
                   Superfamily Plagiorchioidea [(Luhe) Dollfus]
                     Family Rhytidodidae [Odhner, 1926]
                       1 Genus Rhytidode
                       2 Genus Rhytidodoides [Price, 1939]