Kingdom Protoctista Hogg, 1860 Phylum Ciliophora Doflein, 1901 - ciliates Subphylum Cyrtophora see Subphylum Intramacronucleata Lynn, 1996 1 Class Phyllopharyngea de Puytorac et al., 1974 2 Class Nassophorea Small & Lynn, 1981 3 Class Oligohymenophorea de Puytorac et al., 1974 - oligohymenophoreans 4 Class Colpodea Small & Lynn, 1981