Protozoa Goldfuss, 1818 - protozoans
   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
         Order Colpodida de Puytorac et al., 1974
         Order Entodiniomorphida Reichenow, in Doflein & Reichenow, 1929
         Order Trichostomatida Bütschli, 1889 see Subclass Trichostomatia Bütschli, 1889