Kingdom Protista (Haeckel, 1866) - protists
   Phylum Ciliophora Doflein, 1901 - ciliates
     Class Kinetofragminophorea - kinetofragminophoreans see Phylum Ciliophora Doflein, 1901
       Subclass Vestibuliferia de Puytorac et al., 1974 - vestibuliferians see Order Vestibuliferida de Puytorac et al., 1974
         Genus Balantidium Claparède & Lachmann, 1858
         Genus Colpoda Müller, 1773
         Genus Entodinium Stein, 1859
         Genus Isotricha Stein, 1859
         Genus Raabena Wolska, 1967
         Genus Woodruffia Kahl, 1931