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 Protozoa Goldfuss, 1818 see Kingdom Protozoa Goldfuss, 1818
         Phylum Ciliophora Doflein, 1901 - ciliates
           Class Oligohymenophora see Class Oligohymenophorea de Puytorac et al., 1974
             Subclass Hymenostomata see Subclass Hymenostomatia (Delage & Hérouard, 1896) Cavalier-Smith, 1993
               Order Astomatida Schewiakoff, 1896
                 Family Radiophryidae de Puytorac, 1972
                   1 Genus Metaradiophrya Heidenreich, 1935, nom. nud.
                   2 Genus Mrazekiella Kijenskii, 1926
                   3 Genus Ochridanus Georgévitch, 1941
                   4 Genus Radiophrya Rossolimo, 1926