Protozoa Goldfuss, 1818 - protozoans Phylum Ciliophora Doflein, 1901 - ciliates Class Kinetofragminophorea - kinetofragminophoreans see Phylum Ciliophora Doflein, 1901 1 Subclass Gymnostomatia - gymnostome ciliates see Phylum Ciliophora Doflein, 1901 2 Subclass Vestibuliferia de Puytorac et al., 1974 - vestibuliferians see Order Vestibuliferida de Puytorac et al., 1974 3 Subclass Hypostomatia - hypostome ciliates see Subphylum Intramacronucleata Lynn, 1996 4 Subclass Suctoria Claparède & Lachmann, 1858 - suctorians