Kingdom Animalia Linnaeus, 1758 - animals
   Phylum Platyhelminthes Gegenbaur, 1859 - flatworms
     Class Trematoda Rudolphi, 1808 - flukes see Infraclass Trematoda Rudolphi, 1808
       Subclass Digenea Carus, 1863
         Genus Fasciola Linnaeus, 1758
         Genus Microphallus Ward, 1901
         Genus Opisthorchis Blanchard, 1895
         Genus Sanguinicola Plehn, 1905
         Genus Schistosoma Weinland, 1858