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
             01 Subclass Monogenea Carus, 1863 see Infraclass Monogenea
             02 Subclass Aspidogastrea Faust & Tang, 1936
             03 Subclass Digenea Carus, 1863
             04 Family Gyliauchenidae Ozaki, 1933, incertae sedis
             05 Family Gekkonotrematidae incertae sedis
             06 Family Jubilariidae incertae sedis
             07 Family Meristocotylidae Fischthal & Kuntz, 1964, incertae sedis
             08 Family Mesotretidae Poche, 1926, incertae sedis
             09 Family Treptodemidae incertae sedis
             10 Family Acanthocollaritrematidae L. Travassos et al., 1965, incertae sedis
             11 Family Echinoporidae T.A. Krasnolova & T.N. Timofeeva, 1965, incertae sedis