Classification of the Phylum Ciliophora, down to genus, revised by Denis Lynn (unpubl.)
Revised April 24, 2002

Phylum CILIOPHORA Doflein, 1901

Subphylum POSTCILIODESMATOPHORA Gerassimova & Seravin, 1976

Class KARYORELICTEA Corliss, 1974
Class HETEROTRICHEA Stein, 1859

Subphylum INTRAMACRONUCLEATA Lynn, 1996

Class SPIROTRICHEA Bütschli, 1889
Class ARMOPHOREA [authorship?]
Class LITOSTOMATEA Small & Lynn, 1981
Class PHYLLOPHARYNGEA de Puytorac et al., 1974
Class NASSOPHOREA Small & Lynn, 1981
Class COLPODEA Small & Lynn, 1981
Class PROSTOMATEA Schewiakoff, 1896
Class PLAGIOPYLEA Small & Lynn, 1985
Class OLIGOHYMENOPHOREA de Puytorac et al., 1974

Incertae sedis in Phylum Ciliophora

- Arachnidiopsis Penard, 1918 [nomen dubium]
- Euploia Lohmann, 1920 [nomen dubium]
- Isosticha Kiesselbach, 1936 [not mentioned in Aescht]
- Orcavia Tucolesco, 1962
- Sigalasia Delphy, 1938 [nomen dubium]

Coelosomidiidae Corliss, 1961

- Coelosomides Strand, 1928
- Conchostoma Fauré-Fremiet, 1963

Incertae sedis in Family Coelosomidiidae

- Epimecophrya Kahl, 1933
- Paraspathidium Noland, 1937

Sulcigeridae Gajewskaja, 1933 [1928]

- Sulcigera Gajewskaja, 1933 [1928]