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 Balantidium coli (Malmsten, 1857) Stein, 1863