Kingdom Protista (Haeckel, 1866) - protists
   Phylum Ciliophora Doflein, 1901 - ciliates
     Class Kinetofragminophorea - kinetofragminophoreans see Phylum Ciliophora Doflein, 1901
       Subclass Hypostomatia - hypostome ciliates see Subphylum Intramacronucleata Lynn, 1996
         Genus Chlamydodon Ehrenberg, 1835
         Genus Collinia Cépède, 1910
         Genus Dysteria Huxley, 1857
         Genus Gymnodinioides Minkiewicz, 1912
         Genus Heliochona Plate, 1888[1889]
         Genus Isochona Jankowski, 1973
         Genus Microthorax Engelmann, 1862
         Genus Nassula Ehrenberg, 1834