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

Order Protostomatida Small & Lynn, 1985

Fam. Kentrophoridae Jankowski, 1980

- Kentrophoros Sauerbrey, 1928
- Prototrachelocerca Foissner, 1996
- Trachelolophos Foissner & Dragesco, 1996
- Trachelonema Dragesco, 1958 [valid name?]
- Tracheloraphis Dragesco, 1958 [1960?]

Fam. Trachelocercidae Kent, 1881

- Trachelocerca Ehrenberg, 1833 [1840?]

Order Loxodida Jankowski, 1980

Fam. Cryptopharyngidae Jankowski, 1980

- Apocryptopharynx Foissner, 1996
- Cryptopharynx Kahl, 1928

Fam. Loxodidae Bütschli, 1889

- Loxodes Ehrenberg, 1833 [1830]
- Remanella Kahl, 1933 [(Kahl, 1933) Foissner, 1996?]

Order Protoheterotrichida Nouzarède, 1977

Fam. Geleiidae Kahl, 1933

- Avelia Nouzarède, 1977
- Geleia Kahl, 1933 [(Kahl, 1933) Foissner, 1998]
- Gellertia Dragesco, 1999

Incertae sedis in Class KARYORELICTEA

- Ciliofaurea Dragesco, 1960
- Corlissia Dragesco, 1960 [1954]

Class HETEROTRICHEA Stein, 1859

Order Heterotrichida

Suborder Heterotrichina

Fam. Blepharismidae Jankowski in Small & Lynn, 1985

- Anigsteinia Isquith, 1968 - Blepharisma Perty, 1849
- Parablepharisma Kahl, 1932 [nomen nudum]
- Pseudoblepharisma Kahl, 1926 [1927]

Fam. Chattonidiidae Villeneuve-Brachon, 1940

- Chattonidium Villeneuve, 1937

Fam. Climacostomidae Repak, 1972

- Climacostomum Stein, 1859
- Copemetopus Villeneuve-Brachon, 1940
- Fabrea Henneguy, 1890

Fam. Condylostomatidae Kahl in Doflein & Reichenow, 1929

- Condylostoma Bory de St. Vincent, 1826 [1824]
- Condylostomides Da Silva Neto, 1994
- Linostoma Jankowski, 1978 [Linostomella Aescht in Foissner, Berger & Schaumberg, 1999]

Incertae sedis in Family Condylostomatidae

- Dellochus Corliss, 1960

Fam. Folliculinidae Dons, 1914

- Ampullofolliculina Hadzi, 1951
- Ascobius Henneguy, 1884
- Atriofolliculina Hadzi, 1951 [nomen nudum]
- Aulofolliculina Hadzi, 1951
- Botticula Dioni, 1972
- Claustrofolliculina Hadzi, 1951
- Diafolliculina Hadzi, 1951 [nomen nudum]
- Donsia Hadzi, 1951 [obj. syn. for Plicophrya]
- Echinofolliculina Dons, 1934
- Epifolliculina Hadzi, 1951
- Eufolliculina Hadzi, 1951
- Folliculina Lamarck, 1816
- Folliculinopsis Fauré-Fremiet, 1936 [nomen nudum]
- Halofolliculina Hadzi, 1951 [nomen nudum]
- Lagotia Wright, 1858 [1857]
- Latifolliculina Hadzi, 1951
- Magnifolliculina Uhlig, 1964 [nomen nudum]
- Metafolliculina Dons, 1925 [1924]
- Mirofolliculina Dons, 1927 [1928]
- Pachyfolliculina Hadzi, 1951
- Parafolliculina Dons, 1914
- Pebrilla Giard, 1888
- Pedifolliculina Hadzi, 1951 [obj. syn. Pseudofolliculina]
- Perifolliculina Hadzi, 1951
- Planifolliculina Hadzi, 1951
- Platyfolliculina Hadzi, 1938
- Priscofolliculina Deflandre & Deunff, 1957
- Pseudofolliculina Dons, 1914
- Pseudoparafolliculina Andrews & Nelson, 1942 [?]
- Splitofolliculina Hadzi, 1951 [nomen nudum]
- Stentofolliculina Hadzi, 1938
- Tapetofolliculina Andrews & Nelson in Hadzi, 1951 [obj. syn. of Pseudoparafolliculina]
- Valletofolliculina Andrews, 1953

Fam. Peritromidae Stein, 1867

- Peritromus Stein, 1862 [1863]

Fam. Spirostomidae Stein, 1867

- Gruberia Kahl, 1932
- Spirostomum Ehrenberg, 1833 [1834]

Incertae sedis in Family Spirostomidae

- Diplogmus Mansfeld, 1923
- Propygocirrus Mansfeld, 1923

Fam. Stentoridae Carus, 1863

- Stentor Oken, 1815

Incertae sedis in Family Stentoridae

- Parastentor Vuxanovici, 1961
- Stentoropsis Dogiel & Bychowsky, 1934

Suborder Heterotrichina Stein, 1859

Incertae sedis in Suborder Heterotrichina

- Pediostomum Kahl, 1932

Subphylum
INTRAMACRONUCLEATA Lynn, 1996

Class SPIROTRICHEA Bütschli, 1889

Subclass Protocruziidia de Puytorac, Grain & Mignot, 1987

Order Protocruziida Jankowski in Small & Lynn, 1985

Protocruziidae Jankowski in Small & Lynn, 1985

- Protocruzia de Faria, da Cunha & Pinto, 1922

Subclass Phacodiniidia Small & Lynn, 1985

Order Phacodiniida Small & Lynn, 1985

Phacodiniidae Corliss, 1979

- Phacodinium Prowazek, 1900

Subclass Licnophoridia Corliss, 1957

Order Licnophorida Corliss, 1957

Licnophoridae Bütschli, 1887

- Licnophora Claparède, 1867

Subclass Hypotrichia Stein, 1859

Order Kiitrichida Nozawa, 1941

Kiitrichidae Nozawa, 1941

- Caryotricha Kahl, 1932
- Kiitricha Nozawa, 1941

Incertae sedis in Order Kiitrichida

Reichenowellidae Kahl, 1932

- Reichenowella Kahl, 1932

Transitellidae Fryd-Versavel & Tuffrau, 1978

- Balantidioides Kahl, 1930 [Penard in Kahl, 1930]
- Transitella Gellért, 1950 [syn. of Balantidioides]

Order Euplotida Small & Lynn, 1985

Suborder Discocephalina Wicklow, 1982

Discocephalidae Jankowski, 1979

- Discocephalus Ehrenberg in Hemprich & Ehrenberg, 1828 [1831]
- Marginotricha Jankowski, 1978
- Prodiscocephalus Jankowski, 1979
- Psammocephalus Wicklow, 1982

Erionellidae Wicklow, 1982

- Erionella Jankowski, 1978 [syn. of Holosticha]

Suborder Euplotina Small & Lynn, 1985

Aspidiscidae Ehrenberg, 1838

- Aspidisca Ehrenberg, 1830
- Euplotaspis Chatton & Séguéla, 1936
- Onychaspis Stein, 1859 [syn. of Aspidisca]

Incertae sedis in Family Aspidiscidae

- Paraeuplotes Wichterman, 1942

Certesiidae Borror & Hill, 1995

- Certesia Fabre-Domergue, 1885

Euplotidae Ehrenberg, 1838

- Euplotes Ehrenberg, 1830 [Ehrenberg in Hemprich & Ehrenberg, 1831]

Gastrocirrhidae Fauré-Fremiet, 1961

- Cirrhogaster Ozaki & Yagiu, 1941 [syn. of Gastrocirrhus]
- Cytharoides Tuffrau, 1974 [1975]
- Euplotidium Noland, 1937
- Gastrocirrhus Lepsi, 1928
- Swedmarkia Dragesco, 1954

Uronychiidae Jankowski, 1979

- Diophryopsis Hill & Borror, 1992
- Diophrys Dujardin, 1840 [Levander, 1894]
- Paradiophrys Jankowski, 1978
- Uronychia Stein, 1857 [1859]

Subclass Choreotrichia Small & Lynn, 1985

Order Tintinnida Kofoid & Campbell, 1929

Ascampbelliellidae Corliss, 1960

- Acanthostomella Jörgensen, 1927
- Ascampbelliella Corliss, 1960
- Luxiella Lecal, 1953

Incertae sedis in Family Ascampbelliellidae

- Niemarshallia Corliss, 1960
- Wailesia Kofoid & Campbell, 1939

Codonellidae Kent, 1881

- Amphorellina Colom, 1948
- Chitinoidella Doben, 1963
- Claretinella Keij, 1974
- Codonaria Kofoid & Campbell, 1939
- Codonella Haeckel, 1873
- Codonopsis Kofoid & Campbell, 1939
- Coxliellina Colom, 1948
- Crassicollaria Remane, 1962
- Dicloeopella Eicher, 1965
- Durandella Dragastan, 1972
- Lorenziella Knauer & Nagy, 1964
- Parachitinoidella Trejo, 1972
- Poroecus Cleve, 1902
- Praetintinnopsella Borza, 1969
- Pseudarcella Spandel, 1909
- Remanellina Tappan & Loeblich, 1968
- Remaniella Catalano, 1965
- Salpingellina Colom, 1948
- Spinarcella Keij, 1969
- Spinophenia Szczechura, 1969
- Tintinnopsella Colom, 1948
- Tintinnopsis Stein, 1867
- Tytthocorys Tappan & Loeblich, 1968
- Urnulella Szczechura, 1969 [not listed in Aescht]
- Vautrinella Cuvillier & Sacal, 1963
- Yvonniellina Tappan & Loeblich, 1968

Codonellopsidae Kofoid & Campbell, 1929

- Calpionella Lorenz, 1902
- Calpionellites Colom, 1948
- Calpionellopsella Trejo, 1975
- Calpionellopsis Colom, 1948 [syn. of Remaniella]
- Codonellopsis Jörgensen, 1924
- Colomiella Bonet, 1956
- Deflandronella Trejo, 1975
- Laackmanniella Kofoid & Campbell, 1929
- Praecalpionellopsis Borza, 1971
- Stenosemella Jörgensen, 1924
- Stenosemellopsis Colom, 1948

Incertae sedis in Family Codonellopsidae

- Luminella Kofoid & Campbell, 1939

Cyttarocylididae Kofoid & Campbell, 1939

- Cyttarocylis Fol, 1881

Dictyocystidae Haeckel, 1873

- Dictyocysta Ehrenberg, 1854
- Wangiella Nie, 1934

Epiplocylididae Kofoid & Campbell, 1939

- Epicancella Kofoid & Campbell, 1929
- Epiplocylis Jörgensen, 1924
- Epiplocyloides Hada, 1938

Metacylididae Kofoid & Campbell, 1929

- Climacocylis Jörgensen, 1924
- Coxliella Brandt, 1908 [1907]
- Favelloides Colom, 1939 [Thalmann, 1942]
- Helicostomella Jörgensen, 1924
- Metacylis Jörgensen, 1924
- Pseudometacylis Balech, 1968
- Rhabdonelloides Colom, 1939
- Spiroxystonellites Knauer, 1969

Incertae sedis in Family Metcylididae

- Rhizodomus Strelkov & Virketis, 1950 [Wirketis?]
- Stylicauda Balech, 1951

Nolaclusiliidae Sniezek et al., 1991

- Nolaclusilis Snyder & Brownlee, 1991

Petalotrichidae Kofoid & Campbell, 1929

- Parapetalotricha Hada, 1970
- Petalotricha Kent, 1881

Ptychocylididae Kofoid & Campbell, 1929

- Poroecus Cleve, 1902
- Protocymatocylis Kofoid & Campbell, 1929
- Ptychocylis Brandt, 1906 [1896]

Rhabdonellidae Kofoid & Campbell, 1929

- Epirhabdonella Kofoid & Campbell, 1939
- Protorhabdonella Jörgensen, 1924
- Rhabdonella Brandt, 1906
- Rhabdonellopsis Kofoid & Campbell, 1929

Tintinnidae Claparède & Lachmann, 1858

- Albatrossiella Kofoid & Campbell, 1929
- Amphorellopsis Kofoid & Campbell, 1929
- Amphorides Strand, 1929 [1928]
- Brandtiella Kofoid & Campbell, 1929
- Bursaopsis Kofoid & Campbell, 1929
- Buschiella Corliss, 1960
- Canthariella Kofoid & Campbell, 1929
- Clevea Balech, 1948
- Dadayiella Kofoid & Campbell, 1929
- Daturella Kofoid & Campbell, 1929 [nomen dubium]
- Epicranella Kofoid & Campbell, 1929
- Eutintinnus Kofoid & Campbell, 1939
- Odontophorella Kofoid & Campbell, 1929
- Ormosella Kofoid & Campbell, 1929
- Proamphorella Kofoid & Campbell, 1939
- Prostelidiella Kofoid & Campbell, 1939
- Rhabdosella Kofoid & Campbell, 1929
- Salpingacantha Kofoid & Campbell, 1929
- Salpingella Jörgensen, 1924
- Salpingelloides Campbell, 1942
- Steenstrupiella Kofoid & Campbell, 1929
- Stelidiella Kofoid & Campbell, 1929
- Tintinnus Schrank, 1803

Tintinnidiidae Kofoid & Campbell, 1929

- Leprotintinnus Jörgensen, 1900 [1901]
- Tintinnidium Kent, 1881

Undellidae Kofoid & Campbell, 1929

- Amplectella Kofoid & Campbell, 1929
- Amplectellopsis Kofoid & Campbell, 1929
- Circundella Kofoid & Campbell, 1929 [not listed in Aescht]
- Micrundella Busch, 1949 [Loeblich & Tappan, 1968]
- Proplectella Kofoid & Campbell, 1929
- Undella Daday, 1887
- Undellopsis Kofoid & Campbell, 1929

Incertae sedis in Family Undellidae

- Rotundocylis Kufferath, 1952 [not listed in Aescht]

Xystonellidae Kofoid & Campbell, 1929

- Cymatocylis Laackmann, 1910
- Favella Jörgensen, 1924
- Parafavella Kofoid & Campbell, 1929
- Parundella Jörgensen, 1924 [problems with type designation]
- Xystonella Brandt, 1906
- Xystonellopsis Jörgensen, 1924

Incertae sedis in Family Xystonellidae

- Parafavelloides Deflandre & Deflandre-Rigaud, 1949 [delete -Rigaud]

Order Choreotrichida Small & Lynn, 1985

Suborder Leegaardiellina Laval-Peuto, Grain & Deroux, 1994

Leegaardiellidae Lynn & Montagnes, 1988

- Leegaardiella Lynn & Montagnes, 1988

Suborder Lohmanniellina Laval-Peuto, Grain & Deroux, 1994

Lohmanniellidae Montagnes & Lynn, 1991

- Lohmanniella Leegaard, 1915

Suborder Strobilidiina Small & Lynn, 1985

Strobilidiidae Kahl in Doflein & Reichenow, 1929

- Patronella Corliss, 1979 [syn. of Strombidium or Strobilidium]
- Strobilidium Schewiakoff, 1893

Incertae sedis in Family Strobilidiidae

- Ciliospina Leegaard, 1915 [nomen dubium]
- Sphaerotrichium Wulff, 1919 [syn. of Lohmaniella or Strobilidium]

Suborder Strombidinopsina Small & Lynn, 1985

Strombidinopsidae Small & Lynn, 1985

- Strombidinopsis Kent, 1881

Subclass Stichotrichia Small & Lynn, 1985

Order Plagiotomida Albaret, 1974

Plagiotomidae Bütschli, 1887

- Plagiotoma Dujardin, 1841

Order Stichotrichida Fauré-Fremiet, 1961

Amphisiellidae Jankowski, 1979

- Amphisiella Gourret & Roeser, 1888
- Amphisiellides Hemberger, 1985 [Foissner, 1988]
- Circinella Foissner, 1994
- Gastrostyla Engelmann, 1862
- Hemiamphisiella Foissner, 1988
- Orthoamphisiella Eigner & Foissner, 1991
- Paragastrostyla Hemberger, 1981
- Paramphisiella Foissner, 1982 [1988]
- Periholosticha Hemberger, 1982 [1985]
- Psammomitra Borror, 1972 [syn. of Uroleptus]
- Pseudouroleptus Hemberger, 1981 [1985]
- Uroleptoides Wenzel, 1953

Epiclintidae Wicklow & Borror, 1990

- Epiclintes Stein, 1862 [Carey & Tatchell, 1983]

Kahliellidae Tuffrau, 1979

- Cladotricha Gajewskaja, 1926
- Deviata Eigner, 1995
- Engelmanniella Foissner, 1982
- Kahliella Corliss, 1960
- Neogeneia Eigner, 1995
- Parakahliella Berger, Foissner & Adam, 1985
- Paraurostyla Borror, 1972
- Parentocirrus Voss, 1997
- Pseudokahliella Berger, Foissner & Adam, 1985
- Trachelochaeta Srámek-Husek, 1954
- Wallackia Foissner, 1977 [1976]

Incertae sedis in Family Kahliellidae

- Balladyna Kowalewski, 1882
- Banyulsella Dragesco, 1953 [1954]
- Lacazea Dragesco, 1960

Keronidae Dujardin, 1840

- Kerona Ehrenberg, 1835 [Blochmann, 1886]
- Keronopsis Penard, 1922
- Paraholosticha Kahl, 1932 [Wenzel, 1953]

Psilotrichidae Bütschli, 1889

- Hemiholosticha von Gelei, 1954
- Psilotricha Stein, 1859

Spirofilidae von Gelei, 1929

- Atractos Vörösváry, 1950
- Chaetospira Lachmann, 1856
- Hypotrichidium Ilowaisky, 1921
- Microspiretta Jankowski, 1975
- Mucotrichidium Foissner, Oleksiv & Müller, 1990
- Plesiotricha Dragesco, 1970 [syn of Kahliella microstoma]
- Spiretella Borror, 1972 [obj. syn. of Microspiretta]
- Spirofilopsis Corliss, 1960
- Stichotricha Perty, 1849
- Strongylidium Sterki, 1878
- Urospinula Corliss, 1960
- Urostrongylum Kahl, 1932

Incertae sedis in Family Spirofilidae

- Kahliela Tucolesco, 1962

Strongylidiidae Fauré-Fremiet, 1961

- Parastrongylidium Fleury & Fryd-Versavel, 1984 [1985]
- Urostrongylidium Kahl, 1932 [not listed in Aescht]

Incertae sedis in Order Stichotrichida

- Balladinopsis Ghosh, 1921 [nomen dubium]
- Klonostricha Vuxanovici, 1963 [Jankowski, 1979]
- Prooxytricha Poche, 1913 [syn. of Urostyla]
- Psilotrix Gourret & Roeser, 1888
- Stylonethes Sterki, 1878 [nomen dubium]

Order Sporadotrichina Fauré-Fremiet, 1961

Oxytrichidae Ehrenberg, 1838

- Actinotricha Cohn, 1866 [syn. of Oxytricha]
- Ancystropodium Fauré-Fremiet, 1907
- Australocirrus Blatterer & Foissner, 1988
- Balladynella Stiller, 1974 [not available; Jankowski, 1979]
- Coniculostomum Njiné, 1978
- Cyrtohymena Foissner, 1989
- Histriculus Corliss, 1960
- Laurentiella Dragesco & Njiné, 1971
- Notohymena Blatterer & Foissner, 1988
- Onychodromopsis Stokes, 1887
- Onychodromus Stein, 1859
- Opisthotricha Kent, 1882 [syn. of Oxytricha]
- Oxytricha Bory de St. Vincent in Lamouroux, Bory de St. Vincent and Deslongchamps, 1824 [Foissner & Adam, 1983]
- Parahistriculus Grolière, 1976 [1975; syn. of Histriculus?]
- Parastylonychia Dragesco, 1963
- Parurosoma von Gelei, 1954
- Pleurotricha Stein, 1859
- Pseudostrombidium Horváth, 1933
- Steinia Diesing, 1866
- Sterkiella Foissner, Blatterer, Berger & Kohmann, 1991
- Stylonychia Ehrenberg, 1830
- Tachysoma Stokes, 1887 [Borror, 1972]
- Urosoma Kowalewski, 1882 [Berger, 1999]
- Urosomoida Hemberger in Foissner, 1982
- Urosomoides Foissner, 1982 [not listed in Aescht]

Trachelostylidae Small & Lynn, 1985

- Gonostomum Sterki, 1878
- Hemisincirra Hemberger, 1984
- Lamtostyla Buitkamp, 1977
- Terricirra Berger & Foissner, 1989
- Trachelostyla Kahl, 1932 [Borror, 1972]

Incertae sedis in Order Sporadotrichida

- Allotricha Sterki, 1878
- Cinetoconia Renault, 1903 [& Roche, 1898; nomen dubium]
- Gruberella Corliss, 1960

Order Urostylida Jankowski, 1979

Pseudokeronopsidae Borror & Wicklow, 1983

- Bicoronella Foissner, 1995
- Keronella Wiackowski, 1985
- Pseudokeronopsis Borror & Wicklow, 1983
- Thigmokeronopsis Wicklow, 1981
- Tricoronella Blatterer & Foissner, 1988

Pseudourostylidae Jankowski, 1979

- Pseudourostyla Borror, 1972

Urostylidae Bütschli, 1889

- Australothrix Blatterer & Foissner, 1988
- Bakuella Agamaliev & Alekperov, 1976 [Jankowski, 1979]
- Birojima Berger & Foissner, 1989
- Eschaneustyla Stokes, 1886
- Hemicycliostyla Stokes, 1886
- Holosticha Wrzesniowski, 1877
- Notocephalus Petz, Song & Wilbert, 1988 [1995]
- Parabakuella Song & Wilbert, 1988 [syn. of Holostichides]
- Paraholosticha Kahl, 1932 [check]
- Paruroleptus Kahl, 1932 [syn. of Uroleptus]
- Perisincirra Jankowski, 1978
- Territricha Berger & Foissner, 1988
- Trichototaxis Stokes, 1891
- Urostyla Ehrenberg, 1830
- Uroleptopsis Kahl, 1932
- Uroleptus Ehrenberg, 1831 [Foissner, Blatterer, Berger & Kohmann, 1991]

Incertae sedis in Subclass Stichotrichia

- Cossothigma Jankowski, 1978
- Gastrosticha Kahl, 1932 [nomen dubium]
- Hemianthophorus Ehrenberg, 1838 [check source?]
- Paramitrella Jankowski, 1978
- Pelagotrichidium Jankowski, 1978
- Pescozoon Jankowski, 1978
- Stenotricha Jankowski, 1978
- Uncinata Bullington, 1940

Subclass Oligotrichia Bütschli, 1887

Order Halteriida Petz & Foissner, 1992

Halteriidae Claparède & Lachmann, 1858

- Cephalotrichium Meunier, 1910 [syn. of Strobilidium]
- Halteria Dujardin, 1841
- Halterioforma Horváth, 1956 [syn. of Jeannellia]
- Meseres Schewiakoff, 1893 [1892]
- Metastrombidium Fauré-Fremiet, 1924 [Jankowski, 1980]
- Parastrombidium Fauré-Fremiet, 1924 [syn. of Strobilidium]
- Pelagohalteria Foissner, Skogstad & Pratt, 1988

Incertae sedis in Family Halteriidae

- Jeannellia Tucolesco, 1962 [syn. of Halterioforma]
- Octocirrus Rao, 1928 [or Madhava Rao, 1929; nomen dubium]
- Spelaeonecta Jankowski, 1975 [not available]

Order Stombidiida Petz & Foissner, 1992

Strombidiidae Fauré-Fremiet, 1970

- Buehringa Busch, 1921 [syn. of Strombidium]
- Cyrtostrombidium Lynn & Gilron, 1993
- Laboea Lohmann, 1908
- Strombidium Claparède & Lachmann, 1859
- Tontonia Fauré-Fremiet, 1961 [1914]

Incertae sedis in Class SPIROTRICHEA

Class ARMOPHOREA [authorship?]

Order Armophorida Jankowksi, 1964

Caenomorphidae Poche, 1913

- Caenomorpha Perty, 1852
- Cirranter Jankowski, 1964
- Ludio Penard, 1922

Metopidae Kahl, 1927

- Bothrostoma Stokes, 1887
- Brachonella Jankowski, 1964
- Eometopus Small & Lynn, 1985
- Metopus Claparède & Lachmann, 1858 [Kahl, 1932]
- Palmarella Jankowski, 1975
- Parametopus Grolière, de Puytorac & Grain, 1980 [Parametopidium Aescht, 2001]
- Spirorhynchus da Cunha, 1915 [syn. of Metopus]
- Tesnospira Jankowski, 1964 [syn. of Metopus]
- Tropidoatractus Levander, 1884 [1894]

Order Clevelandellida de Puytorac & Grain, 1976

Clevelandellidae Kidder, 1938

- Clevelandella Kidder, 1938
- Metaclevelandella Uttangi & Desai, 1963
- Paraclevelandia Kidder, 1937

Inferostomatidae Ky, 1971

- Inferostoma Ky, 1971

Neonyctotheridae Affa'a, 1987

- Neonyctotherus Affa'a, 1983

Nyctotheridae Amaro, 1972

- Cichlidotherus Affa'a, 1989
- Metanyctotherus Albaret, 1970
- Nyctositum Affa'a, 1979
- Nyctotheroides Grassé, 1928
- Nyctotherus Leidy, 1849
- Paracichlidotherus Grim, 1992
- Pronyctotherus Albaret & Njiné, 1976
- Pygmotheroides Affa'a, 1979 [1980]

Sicuophoridae Amaro, 1972

- Geimania Albaret, 1975
- Metasicuophora Albaret, 1973
- Parasicuophora Albaret, 1968
- Prosicuophora de Puytorac & Oktem, 1967
- Sicuophora de Puytorac & Grain, 1969 [1968]

Incertae sedis in Family Sicuophoridae

- Ichthyonyctus Jankowski, 1974

Incertae sedis in Order Clevelandellida

Nathellidae Singh, 1953

- Nathella Singh, 1953 [nomen nudum]

Order Odontostomatida Sawaya, 1940

Discomorphellidae Corliss, 1960

- Discomorphella Corliss, 1960

Epalxellidae Corliss, 1960

- Atopodinium Kahl, 1932
- Epalxella Corliss, 1960
- Pelodinium Lauterborn, 1908
- Saprodinium Lauterborn, 1908

Mylestomatidae Kahl in Doflein & Reichenow, 1929

- Mylestoma Kahl, 1928

Class LITOSTOMATEA Small & Lynn, 1981

Subclass Haptoria Corliss, 1974

Order Cyclotrichida Jankowski, 1980

Mesodiniidae Jankowski, 1980

- Askenasia Blochmann, 1895 [Kahl, 1930]
- Mesodinium Stein, 1862 [1863]
- Myrionecta Jankowski, 1976 [nomen nudum]
- Pelagovasicola Jankowski, 1980
- Rhabdoaskenasia Krainer & Foissner, 1990

Order Haptorida Corliss, 1974

Acropisthiidae Foissner & Foissner, 1988

- Acropisthium Perty, 1852
- Fuscheria Foissner, 1983

Actinobolinidae Kahl, 1930

- Actinobolina Strand, 1928
- Belonophrya André, 1914
- Dactylochlamys Lauterborn, 1901
- Legendrea Fauré-Fremiet, 1908

Didiniidae Poche, 1913

- Astrostoma Alekperov in Corliss, 1979 [nomen nudum]
- Choanostoma Wang, 1931 [nomen dubium]
- Cyclotrichium Meunier, 1910
- Didinium Poche, 1913 [Stein, 1859]
- Dinophrya Bütschli, 1889 [syn. of Acropisthium]
- Liliimorpha Gajewskaja, 1928
- Monodinium Fabre-Domergue, 1888
- Zonotrichium Meunier, 1910

Enchelyidae Ehrenberg, 1838

- Crobylura André, 1914
- Enchelydium Kahl, 1930
- Enchelys O. F. Müller, 1773
- Haematophagus Woodcock & Lodge, 1921
- Ileonema Stokes, 1884
- Lagynurus Mansfeld, 1923
- Longitricha Gajewskaja, 1933
- Microregma Kahl, 1930
- Nannophrya Kahl, 1933
- Papillorhabdos Foissner, 1984
- Pithothorax Kahl, 1926
- Quasillagilis Busch, 1920 [nomen dubium]
- Rhopalophrya Kahl, 1926 [not available]
- Schewiakoffia Corliss, 1960 [nomen dubium]
- Spasmostoma Kahl, 1927
- Sphaerobactrum Schmidt, 1920
- Thalassiomastix Busch, 1923 - Urochaenia Savi, 1913

Incertae sedis in Family Enchelyidae

- Microcardiosoma Vuxanovici, 1963
- Microchoanostoma Vuxanovici, 1963

Helicoprorodontidae Small & Lynn, 1985

- Helicoprorodon Fauré-Fremiet, 1950

Homalozoonidae Jankowski, 1980

- Homalozoon Stokes, 1890

Lacrymariidae de Fromentel, 1876

- Lacrymaria Bory de St. Vincent, 1826 [1824]
- Phialina Bory de St. Vincent, 1824

Pleuroplitidae Foissner, 1996

- Pleuroplites Foissner, 1988

Pseudoholophryidae Berger, Foissner & Adam, 1984

- Ovalorhabdos Foissner, 1984
- Paraenchelys Foissner, 1983
- Pseudoholophrya Berger, Foissner & Adam, 1983 [1984]

Pseudotrachelocercidae Song, 1990

- Pseudotrachelocerca Song, 1990

Spathidiidae Kahl in Doflein & Reichenow, 1929

- Arcuospathidium Foissner, 1984
- Bryophyllum Kahl, 1931
- Cranotheridium Schewiakoff, 1893
- Diceratula Corliss, 1960 [nomen dubium]
- Epispathidium Foissner, 1984
- Lacerus Jankowski, 1967
- Micromidas Delphy, 1938
- Myriokaryon Jankowski, 1973
- Penardiella Kahl, 1930
- Perispira Stein, 1859
- Protospathidium Dragesco & Dragesco-Kernéis, 1979 [Foissner, 1984]
- Spathidiodes Kahl, 1926
- Spathidioides Brodsky, 1925
- Spathidiosus Gajewskaja, 1933
- Spathidium Dujardin, 1841
- Supraspathidium Foissner & Didier, 1981
- Thysanomorpha Jankowski, 1967

Incertae sedis in Family Spathidiidae

- Proboscidium Meunier, 1910 [nomen dubium]

Tracheliidae Ehrenberg, 1838

- Branchiocetes Kahl, 1931 [nomen nudum]
- Dileptus Dujardin, 1840 [1841]
- Dimacrocaryon Jankowski, 1967
- Micruncus Delphy, 1938
- Monilicaryon Jankowski, 1967
- Paradileptus Wenrich, 1929
- Rimaleptus Foissner, 1984
- Teuthophrys Chatton & de Beauchamp, 1923
- Trachelius Schrank, 1803

Incertae sedis in Family Tracheliidae

- Ctenoctophrys Weill, 1946 [not listed in Aescht]

Trachelophyllidae Kent, 1882

- Acaryophrya Perty, 1852 [André, 1915]
- Chaenea Quennerstedt, 1867
- Enchelyodon Claparède & Lachmann, 1859
- Foissnerides Song & Wilbert, 1989
- Lagynophrya Kahl, 1927
- Lepidotrachelophyllum Nicholls & Lynn, 1984 [Foissner, 1994?]
- Trachelophyllum Claparède & Lachmann, 1859

Order Pleurostomatida Schewiakoff, 1896

Amphileptidae Bütschli, 1889

- Amphileptus Ehrenberg, 1830
- Opisthodon Stein, 1859
- Pseudoamphileptus Foissner, 1983

Litonotidae Kent, 1882

- Acineria Dujardin, 1841
- Heminotus Kahl, 1933
- Litonotus Wresniowski, 1870 [Foissner, Berger, Blatterer & Kohmann, 1995]
- Loxophyllum Dujardin, 1841
- Siroloxophyllum Foissner & Leipe, 1995

Incertae sedis in Subclass Haptoria

- Baznosanuia Tucolesco, 1962
- Celerita Tucolesco, 1962
- Pseudoenchelys Tucolesco, 1962 [syn. of Enchelydium]
- Racovitzaia Tucolesco, 1962 [Racovitzaiella Aescht, 2001]

Protohalliidae da Cunha & Muniz, 1927

- Protohallia da Cunha & Muniz, 1927

Subclass Trichostomatia Bütschli, 1889

Order Vestibuliferida de Puytorac et al., 1974

Balantidiidae Reichenow in Doflein & Reichenow, 1929

- Balantidium Claparède & Lachmann, 1858

Isotrichidae Bütschli, 1889

- Bitricha Cameron, O'Donoghue & Adlard, 2000
- Dasytricha Schuberg, 1888
- Isotricha Stein, 1859
- Protoisotricha Kopperi, 1937 [1935]

Paraisotrichidae da Cunha, 1917

- Enterophrya Hasselmann, 1918
- Paraisotricha Fiorentini, 1890
- Rhizotricha Wolska, 1964

Incertae sedis in Family Paraisotrichidae

- Helicozoster Latteur, 1967

Pycnotrichidae Poche, 1913

- Collinina Chatton & Pérard, 1921 [1924]
- Infundibulorium Bozhenko, 1925
- Nicollella Chatton & Pérard, 1919
- Pycnothrix Schubotz, 1908 [1909]
- Vestibulongum Grim, 1988

Incertae sedis in Order Vestibuliferida

- Buxtonella Jameson, 1926
- Muniziella da Fonseca, 1939
- Taliaferria Hegner & Rees, 1933

Protocaviellidae Grain in Corliss, 1979

- Hydrochoerella da Cunha & Muniz, 1925
- Protocaviella Kopperi, 1937 [1935]

Order Entodiniomorphida Reichenow in Doflein & Reichenow, 1929

Suborder Archistomatina de Puytorac et al., 1974

Buetschliidae Poche, 1913

- Alloiozona Hsiung, 1930
- Ampullacula Hsiung, 1930
- Amylophorus Pereira & Almeida, 1942
- Blepharocodon Bundle, 1895
- Blepharoconus Gassovsky, 1919
- Blepharomonas Kopperi, 1937
- Blepharoplanum Kopperi, 1937
- Blepharoposthium Bundle, 1895
- Blepharosphaera Bundle, 1895
- Blepharozoum Gassovsky, 1919
- Buetschlia Schuberg, 1888
- Buissonella de Cunha & Muniz, 1925
- Bundleia da Cunha & Muniz, 1928
- Cucurbella Thurston & Grain, 1971
- Didesmis Fiorentini, 1890
- Hemiprorodon Strelkow, 1939
- Holophryoides Gassovsky, 1919
- Holophryozoon Jirovec, 1933
- Kopperia Corliss, 1960
- Levanderella Kopperi, 1937
- Meiostoma Sandon, 1941
- Paraisotrichopsis Gassovsky, 1919
- Pingius Hsiung, 1932
- Polymorphella Corliss, 1960
- Prorodonopsis Gassovsky, 1919
- Protolutzia da Cunha & Muniz, 1925
- Pseudobuetschlia Jirovec, 1933
- Sciurula Corliss, 1960
- Sulcoarcus Hsiung, 1935
- Wolskana Ito, Ogimoto & Nakahara, 1996

Suborder Blepharocorythina Wolska, 1971

Blepharocorythidae Hsiung, 1929

- Blepharocorys Bundle, 1895
- Charonina Strand, 1928
- Charonnautes Strelkow, 1939
- Circodinium Wolska, 1971
- Ochoterenaia Chavarria, 1933
- Pararaabena Wolska, 1968
- Raabena Wolska, 1967
- Spirocorys Wolska, 1969

Suborder Entodiniomorphina Reichenow in Doflein & Reichenow, 1929

Cycloposthiidae Poche, 1913

- Bertolinella Carpano, 1941
- Bozasella Buisson, 1923
- Cycloposthium Bundle, 1895
- Diplolophus Hollande & Batisse, 1959 [nomen nudum]
- Lavierella Buisson, 1923
- Prototapirella da Cunha, 1919 [1918]
- Toxodinium da Cunha, 1938
- Tricaudalia Buisson, 1923
- Trifascicularia Strelkow, 1931
- Tripalmaria Gassovsky, 1919
- Triplumaria Hoare, 1937

Incertae sedis in Family Cycloposthiidae

- Monoposthium Thurston & Noirot-Timothée, 1973
- Parentodinium Thurston & Noirot-Timothée, 1973

Ditoxidae Strelkow, 1939

- Ditoxum Gassovsky, 1919
- Tetratoxum Gassovsky, 1919
- Triadinium Fiorentini, 1890

Macropodiniidae Dehority, 1996

- Macropodinium Dehority, 1996

Ophryoscolecidae Stein, 1859

- Caloscolex Dogiel, 1926
- Campylodinium Jankowski, 1975
- Cunhaia Hasselmann, 1918 [1924]
- Diplodinium Schuberg, 1888
- Diploplastron Kofoid & MacLennan, 1932
- Elytroplastron Kofoid & MacLennan, 1932
- Enoploplastron Kofoid & MacLennan, 1932
- Entodinium Stein, 1859
- Eodinium Kofoid & MacLennan, 1932
- Epidinium Crawley, 1923
- Epiplastron Kofoid & MacLennan, 1933
- Eremoplastron Kofoid & MacLennan, 1932
- Eudiplodinium Dogiel, 1927
- Metadinium Awerinzew & Mutafowa, 1914
- Ophryoscolex Stein, 1859
- Opisthotrichium Buisson, 1923 [Dogiel, 1927]
- Ostracodinium Dogiel, 1927
- Polyplastron Dogiel, 1927

Polydiniellidae Corliss, 1960

- Elephantophilus Kofoid, 1935
- Polydiniella Corliss, 1960
- Pterodinium Latteur & Dartevelle, 1971 [Pterodiniella Aescht, 2001]
- Thoracodinium Latteur, 1958

Rhinozetidae Van Hoven, Gilchrist & Hamilton-Attwell, 1988

- Rhinozeta Van Hoven, Gilchrist & Hamilton-Attwell, 1988

Spirodiniidae Strelkow, 1939

- Cochliatoxum Gassovsky, 1919
- Spirodinium Fiorentini, 1890

Telamodiniidae Latteur & Dufey, 1967

- Megadinium Latteur & Dufey, 1967
- Telamodinium Latteur & Dufey, 1967
- Teratodinium Latteur & Dufey, 1967

Troglodytellidae Corliss, 1979

- Gorillophilus Imai, Ikeda, Collet & Bonhomme, 1991
- Troglodytella Brumpt & Joyeux, 1912

Class PHYLLOPHARYNGEA de Puytorac et al., 1974

Subclass Phyllopharyngia de Puytorac et al., 1974

Order Chlamydodontida Deroux, 1976

Chilodonellidae Deroux, 1970

- Chilodonatella Dragesco, 1966
- Chilodonella Strand, 1928
- Phascolodon Stein, 1859
- Pseudochilodonopsis Foissner, 1979
- Thigmogaster Deroux, 1976
- Trithigmostoma Jankowski, 1967

Incertae sedis in Family Chilodonellidae

- Odontochlamys Certes, 1891
- Phyllotrichum Engelmann, 1875 [Engelmann in Bütschli, 1889]

Chitonellidae Small & Lynn, 1985

- Chitonella Small & Lynn, 1985

Chlamydodontidae Stein, 1859

- Chlamydodon Ehrenberg, 1835
- Cyrtophoron Deroux, 1975

Gastronautidae Deroux, 1994

- Gastronauta Bütschli, 1889 [Engelmann in Bütschli, 1889 or Engelmann, 1875]

Kryoprorodontidae Alekperov & Mamajeva, 1992

- Gymnozoum Meunier, 1910

Lynchelliae Jankowski, 1968

- Atopochilodon Kahl, 1933
- Chlamydonella Deroux, 1970 [Petz, Song & Wilbert, 1995]
- Chlamydonellopsis Blatterer & Foissner, 1990
- Coeloperix Deroux, 1976 [1978; nomen nudum]
- Lynchella Kahl, 1933 [Jankowski, 1968]

Incertae sedis in Family Lynchellidae

- Lophophorina Penard, 1922

Order Dysteriida Deroux, 1976

Dysteriidae Claparède & Lachmann, 1858

- Agnathodysteria Deroux, 1977 [1976]
- Allosphaerium Kidder & Summers, 1935
- Dysteria Huxley, 1857
- Hartmannulopsis Deroux & Dragesco, 1968
- Microdysteria Kahl, 1933 [not listed in Aescht]
- Schedotrochilia Deroux, 1977 [1976]
- Trochilia Dujardin, 1841

Hartmannulidae Poche, 1913

- Aegyriana Deroux, 1975 [syn. of Dysteria]
- Brooklynella Lom & Nigrelli, 1970
- Chlamydonyx Deroux, 1977 [1976]
- Hartmannula Poche, 1913
- Microxysma Deroux, 1977 [1976]
- Orthotrochilia Deroux, 1977 [nomen nudum]
- Paratrochilia Kahl, 1933
- Sigmocineta Jankowski, 1967
- Trichopodiella Corliss, 1960
- Trochilioides Kahl, 1931 [nomen nudum]

Incertae sedis in Family Hartmannulidae

- Horocontus Deroux, 1977 [1976]

Kyaroikeidae Sniezek & Coats, 1996

- Kyaroikeus Sniezek, Coats & Small, 1995

Plesiotrichopidae Deroux, 1976

- Atelepithites Deroux, 1976
- Parachilodonella Dragesco, 1966
- Pithites Deroux & Dragesco, 1968
- Plesiotrichopus Fauré-Fremiet, 1965
- Trochochilodon Deroux, 1976

Incertae sedis in Subclass Phyllopharyngia

- Dysterioides Matthes, 1950

Subclass Chonotrichia Wallengren, 1895

Order Exogemmida Jankowski, 1972

Chilodochonidae Wallengren, 1895

- Chilodochona Wallengren, 1895
- Mystichona Jankowski, 1972 [nomen nudum]
- Vasichona Jankowski, 1972

Filichonidae Jankowski, 1973

- Aurichona Jankowsi, 1973
- Filichona Jankowski, 1973

Heliochonidae Jankowski, 1972

- Heliochona Plate, 1888 [1889]
- Heterochona Jankowski, 1972

Lobochonidae Jankowski, 1967

- Lobochona Dons, 1940
- Oenophorachona Matsudo & Mohr, 1968
- Physochona Batisse & Crumeyrolle, 1988
- Toxochona Jankowski, 1972

Phyllochonidae Jankowski, 1972

- Phyllochona Jankowski, 1972

Spirochonidae Stein, 1854

- Cavichona Jankowski, 1973
- Serpentichona Jankowski, 1973
- Spirochona Stein, 1852

Sedis mutabilis in Order Exogemmida

- Eleutherochona Jankowski, 1971 [nomen nudum]

Order Cryptogemmida Jankowski, 1975

Actinichonidae Jankowski, 1973

- Actinichona Jankowski, 1973
- Carinichona Jankowski, 1973
- Crassichona Jankowski, 1973
- Cristichona Jankowski, 1973
- Kentrochonopsis Doflein, 1897
- Rhizochona Jankowski, 1973

Echinichonidae Jankowski, 1973

- Coronochona Jankowski, 1973
- Echinichona Jankowski, 1973
- Eurychona Jankowski, 1973

Inversochonidae Jankowski, 1973

- Ceratochona Jankowski, 1973
- Chonosaurus Jankowski, 1973
- Inversochona Jankowski, 1973
- Kentrochona Rompel, 1894
- Pleochona Jankowski, 1973

Isochonidae Jankowski, 1973

- Cyamichona Jankowski, 1971
- Inermichona Jankowski, 1971
- Isochona Jankowski, 1973
- Thalassochona Jankowski, 1971
- Trichochona Mohr, 1948

Isochonopsidae Batisse & Crumeyrolle, 1988

- Isochonopsis Batisse & Crumeyrolle, 1988

Stylochonidae Mohr, 1948

- Armichona Jankowski, 1973
- Ctenochona Jankowski, 1973
- Dentichona Jankowski, 1973
- Eriochona Jankowski, 1973
- Flectichona Jankowski, 1973
- Oxychonina Corliss, 1979
- Paraoxychona Jankowski, 1973
- Pterochona Jankowski, 1973
- Spinichona Jankowski, 1973
- Stylochona Kent, 1881

Subclass Rhynchodia Chatton & Lwoff, 1939

Order Rhynchodida Chatton & Lwoff, 1939

Suborder Ancistrocomina Chatton & Lwoff, 1939

Ancistrocomidae Chatton & Lwoff, 1939

- Ancistrocoma Chatton & Lwoff, 1926
- Anisocomides Chatton & Lwoff, 1950
- Colligocineta Kozloff, 1965
- Crebricoma Kozloff, 1946
- Enerthecoma Jarocki, 1935
- Goniocoma Chatton & Lwoff, 1950
- Heterocinetopsis Jarocki, 1935
- Holocoma Chatton & Lwoff, 1950
- Hypocomagalma Jarocki & Raabe, 1932
- Hypocomatidium Jarocki & Raabe, 1932
- Hypocomella Chatton & Lwoff, 1924
- Hypocomides Chatton & Lwoff, 1922
- Hypocomidium Raabe, 1938
- Hypocomina Chatton & Lwoff, 1924
- Ignotocoma Kozloff, 1961
- Insignicoma Kozloff, 1946
- Isocomides Chatton & Lwoff, 1950
- Kozloffiella Raabe, 1970
- Nordicoma Jankowski in Corliss, 1979 [nomen nudum]
- Raabella Chatton & Lwoff, 1950
- Stegotricha Bower & Meyer, 1993
- Syringopharynx Collin, 1914 [1915; syn. of Ancistrocoma]

Incertae sedis in Family Ancistrocomidae

- Cepedella Poyarkoff, 1909

Suborder Rhynchodina Chatton & Lwoff, 1939

Sphenophryidae Chatton & Lwoff, 1921

- Gargarius Chatton & Lwoff, 1934
- Pelecyophrya Chatton & Lwoff, 1922
- Sphenophrya Chatton & Lwoff, 1921

Incertae sedis in Order Rhynchodida

- Lwoffia Kozloff, 1955

Order Hypocomatida Deroux, 1976

Hypocomidae Bütschli, 1889

- Crateristoma Jankowski, 1967
- Hypocoma Gruber, 1884
- Parahypocoma Chatton & Lwoff, 1939
- Rhynchocoma Jankowski, 1975

Subclass Suctoria Claparède & Lachmann, 1858

Order Exogenida Collin, 1912

Corynophryidae Jankowski, 1981

- Corynophrya Kahl, 1934 [Curds, 1987]

Ephelotidae Kent, 1882

- Actinocyathula Corliss, 1960
- Ephelota Wright, 1858
- Metephelota Willis, 1945
- Podocyathus Kent, 1882
- Tunicophrya Jankowski, 1973

Metacinetidae Bütschli, 1889

- Metacineta Bütschli, 1889

Ophryodendridae Stein, 1867

- Loricodendron Jankowski, 1973 [not recognized by Matthes]
- Ophryodendron Claparède & Lachmann, 1859
- Schizactinia Jankowski, 1967

Paracinetidae Jankowski, 1978

- Paracineta Collin, 1911

Parapodophryidae Jankowski, 1973

- Parapodophrya Kahl, 1931

Phalacrocleptidae Kozloff, 1966

- Phalacrocleptes Kozloff, 1966

Podophryidae Haeckel, 1866

- Gajewskajophrya Matthes, 1988
- Kystopus Jankowski, 1967 [syn. of Podophrya]
- Manuelophrya Matthes, 1988 [Jankowski, 1997]
- Mistarcon Jankowski, 1997
- Mucophrya Gajewskaja, 1928
- Ophryocephalus Wailes, 1925
- Podophrya Ehrenberg, 1838 [1834]
- Sphaerophrya Claparède & Lachmann, 1859

Incertae sedis in Family Podophryidae

- Lecanophrya Kahl, 1934

Rhabdophryidae Jankowski, 1970

- Dendrosomides Collin, 1906 [1905]
- Rhabdophrya Chatton & Collin, 1910
- Trophogemma Jankowski, 1970

Spelaeophryidae Jankowski in Batisse, 1975

- Spelaeophrya Stammer, 1935

Stylostomatidae Batisse, 1975

- Asterifer Jankowski, 1967 [not recognized by Matthes]
- Stylostoma Milne, 1886

Tachyblastonidae Grell, 1950

- Tachyblaston Martin, 1909

Thecacinetidae Matthes, 1956

- Canellana Jankowski, 1967 [syn. of Acineta]
- Praethecacineta Matthes, 1956
- Thecacineta Collin, 1909 [1912]

Urnulidae Fraipont, 1878

- Urnula Claparède & Lachmann, 1859 [1857]

Order Endogenida Collin, 1912

Acinetidae Stein, 1859

- Acineta Ehrenberg, 1833 [1834]
- Acinetides Swarczewsky, 1928
- Acinetopsis Robin, 1879
- Arcosoma Jankowski, 1967
- Cryptophrya Jankowski, 1973
- Dactylophrya Collin, 1909 [syn. of Tachyblaston]
- Lecanodiscus Jankowski, 1973
- Loricophrya Matthes, 1956
- Plicophrya Jankowski, 1975 [syn. of Acineta]
- Pseudocorynophrya Small & Lynn, 1985
- Pseudogemma Collin, 1909
- Pseudogemmides Kormos, 1935
- Solenophrya Claparède & Lachmann, 1859
- Squalorophrya Goodrich & Jahn, 1943 [potentially valid]
- Suctorella Frenzel, 1891 [1892]
- Tokophryella Jankowski, 1973
- Trematosoma Batisse, 1972 [1973]

Incertae sedis in Family Acinetidae

- Cucumophrya Kunz, 1936

Dendrosomatidae Fraipont, 1878

- Baikalodendron Swarczewsky, 1928
- Baikalophrya Swarczewsky, 1928
- Brachysoma Batisse, 1975
- Dendrosoma Ehrenberg, 1838 [1837]
- Gorgonosoma Swarczewsky, 1928 [syn. of Dendrosoma]
- Lernaeophrya Pérez, 1903 [syn. of Trichophrya]
- Thaumatophrya Collin, 1912
- Tokophryopsis Swarczewsky, 1928

Enchelyomorphidae Augustin & Foissner, 1992

- Enchelyomorpha Kahl, 1930

Endosphaeridae Jankowski in Corliss, 1979

- Endosphaera Engelmann, 1876
- Physaliella Penard, 1920 [syn. of Trypanococcus]
- Trypanococcus Zacharias, 1885 [Stein in Zacharias, 1885]

Tokophryidae Jankowski in Small & Lynn, 1985

- Allantosoma Gassovsky, 1919
- Choanophrya Hartog, 1902
- Erastophrya Fauré-Fremiet, 1944 [1943]
- Hypophrya López-Ochoterena, 1964 [syn. of Tokophrya]
- Multifasciculatum Goodrich & Jahn, 1943
- Pottsiocles Corliss, 1960
- Pseudogemma Collin, 1909 [or in Acinetidae - check]
- Rhyncheta Zenker, 1866
- Staurophrya Zacharias, 1893
- Tokophrya Bütschli, 1889

Trichophryidae Fraipont, 1878

- Actinobranchium Jankowski, 1967
- Astrophrya Awerinzew, 1904 [syn. of Dendrosoma]
- Capriniana Mazzarelli, 1906 [Strand, 1928; syn. of Trichophrya]
- Heliophrya Saedeleer & Tellier, 1930 [Matthes, 1954]
- Marinecta Jankowski, 1973
- Phagobranchium Jankowski, 1967 [syn. of Capriniana or Trichophrya]
- Platophrya Gönnert, 1935 [obj. syn. of Heliophrya]
- Tetraedrophrya Zykoff, 1902 [nomen nudum]
- Trichophrya Claparède & Lachmann, 1859

Order Evaginogenida Jankowski in Corliss, 1979

Cyathodiniidae da Cuhna, 1914

- Cyathodinium da Cunha, 1914

Dendrocometidae Haeckel, 1866

- Cometodendron Swarczewsky, 1928
- Dendrocometes Stein, 1852
- Dendrocometides Swarczewsky, 1928
- Discosomatella Corliss, 1960
- Stylocometes Stein, 1867
- Stylophrya Swarczewsky, 1928

Discophryidae Collin, 1912

- Anarma Goodrich & Jahn, 1943 [syn. of Discophrya]
- Caracatharina Kormos, 1961 [Kormos in Corliss, 1960; syn. of Discophrya]
- Cyclophrya Gönnert, 1935
- Dactylostoma Jankowski, 1967
- Discophrya Lachmann, 1859
- Echinophrya Swarczewsky, 1928
- Periacineta Collin, 1909 [potentially valid]
- Peridiscophrya Nozawa, 1938
- Prodiscophrya Kormos, 1935
- Rhynchophrya Collin, 1909
- SqualorophryaGoodrich & Jahn, 1943 [potentially valid]
- Testudinicola Jahn, Bovee & Jahn, 1979 [potentially valid]

Incertae sedis in Class PHYLLOPHARYNGEA

- Silenella Fenchel, 1965

Class NASSOPHOREA Small & Lynn, 1981

Order Synhymeniida de Puytorac et al., 1974

Orthodonellidae Jankowski, 1968

- Orthodonella Bhatia, 1936
- Zosterodasys Deroux, 1978

Incertae sedis in Family Orthodonellidae

- Eucamptocerca da Cunha, 1914 [nomen dubium]

Nassulopsidae Deroux in Corliss, 1979

- Nassulopsis Fauré-Fremiet, 1959 [Foissner, Berger & Kohmann, 1994]
- Phasmatopsis Deroux, 1978 [obj. syn. of Beersena Jankowski, 1989]

Scaphidiodontidae Deroux, 1978

- Chilodontopsis Blochmann, 1895
- Scaphidiodon Stein, 1859

Synhymeniidae Jankowski in Small & Lynn, 1985

- Synhymenia Jankowski, 1967 [1968]

Order Nassulida Jankowski, 1967

Colpodidiidae Foissner, 1995

- Colpodidium Wilbert, 1982
- Pedohymena Foissner, 1995

Furgasoniidae Corliss, 1979

- Furgasonia Jankowski, 1964
- Parafurgasonia Foissner & Adam, 1981

Nassulidae de Fromentel, 1874

- Nassula Ehrenberg, 1833 [1834]
- Naxella Foissner & Donoghue, 1990 [Fryd-Versavel, Iftode & Deroux, 1980]
- Obertrumia Foissner & Adam, 1981 [Foissner, 1987]
- Rhinakis Iftode, Fryd & Deroux in Deroux, 1994 [nomen nudum]

Incertae sedis in Family Nassulidae

- Archinassula Kahl, 1935
- Chilodina Srämek-Husek, 1957
- Cyrtohymenostoma Das, Chatterjee & Ray, 1969 [not available]
- Stomatophrya Kahl, 1933

Paranassulidae Fauré-Fremiet, 1962

- Enneameron Jankowski, 1964 [syn. of Nassulopsis]
- Paranassula Kahl, 1931

Order Microthoracida Jankowski, 1967

Discotrichidae Jankowski, 1967

- Discotricha Tuffrau, 1954

Microthoracidae Wrzesniowski, 1870

- Drepanomonas Fresenius, 1858
- Hemicyclium Eberhard, 1862 [syn. of Microthorax]
- Leptopharynx Mermod, 1914
- Microthorax Engelmann, 1862
- Stammeridium Wenzel, 1969
- Trochiliopsis Penard, 1922

Incertae sedis in Family Microthoracidae

- Conchophrys Chatton, 1911
- Hexotricha Conn in Conn & Edmondson, 1918

Pseudomicrothoracidae Jankowski, 1967

- Pseudomicrothorax Mermod, 1914

Class COLPODEA Small & Lynn, 1981

Order Bryometopida Foissner, 1985

Bryometopidae Jankowski, 1980

- Bryometopus Kahl, 1932
- Thylakidium Schewiakoff, 1892 [1893]

Jaroschiidae Foissner, 1993

- Jaroschia Foissner, 1993
- Pentahymena Foissner, 1994

Kreyellidae Foissner, 1979

- Kreyella Kahl, 1931
- Microdiaphanosoma Wenzel, 1953
- Orthokreyella Foissner, 1984

Trihymenidae Foissner, 1988

- Trihymena Foissner, 1988

Order Bryophryida de Puytorac et al., 1979

Bryophryidae de Puytorac et al., 1979

- Bryophrya Wenzel, 1953
- Notoxoma Foissner, 1993
- Parabryophrya Foissner, 1985
- Puytoraciella Njiné, 1979

Order Bursariomorphida Fernández-Galiano, 1978

Bursariidae Bory de St. Vincent, 1826

- Bursaria O.F. Müller, 1773

Bursaridiidae Foissner, 1993

- Bursaridium Lauterborn, 1894
- Paracondylostoma Foissner, 1980

Order Colpodida de Puytorac et al., 1974

Bardeliellidae Foissner, 1984

- Bardeliella Foissner, 1984

Colpodidae Bory de St. Vincent, 1826

- Apocolpoda Foissner, 1993
- Bresslaua Kahl, 1931
- Colpoda O.F. Müller, 1773
- Corticocolpoda Foissner, 1993
- Cosmocolpoda Foissner, 1993
- Idiocolpoda Foissner, 1993
- Krassniggia Foissner, 1987
- Kuehneltiella Foissner, 1990

Grandoriidae Corliss, 1960

- Grandoria Corliss, 1960

Grossglockneriidae Foissner, 1980

- Grossglockneria Foissner, 1980
- Nivaliella Foissner, 1980
- Pseudoplatyophrya Foissner, 1980

Hausmanniellidae Foissner, 1987

- Avestina Jankowski, 1980
- Corallocolpoda Alekperov, 1991
- Bresslauides Blatterer & Foissner, 1988
- Hausmanniella Foissner, 1984
- Kalometopia Bramy, 1962

Marynidae Poche, 1913

- Ilsiella Foissner, 1987
- Maryna Gruber, 1879
- Mycterothrix Lauterborn, 1898 [Kahl, 1931]
- Opisthostomatella Corliss, 1960

Order Cyrtolophosidida Foissner, 1978

Cyrtolophosididae Stokes, 1888

- Aristerostoma Kahl, 1926
- Cyrtolophosis Stokes, 1885
- Pseudocyrtolophosis Foissner, 1980

Platyophryidae de Puytorac et al., 1979

- Cirrophrya Géllert, 1950
- Platyophrya Kahl, 1926
- Platyophryides Foissner, 1987
- Reticulowoodruffia Foissner, 1993
- Semiplatyophrya Wilbert & Kahan, 1986

Sagittariidae R. & L. Grandori, 1935

- Sagittaria R. & L. Grandori, 1934

Woodruffiidae von Gelei, 1954

- Kuklikophrya Njiné, 1979
- Rhyposophrya Kahl, 1935 [1933]
- Rostrophrya Njiné, 1979 [Foissner, 1993]
- Rostrophryides Foissner, 1987
- Woodruffia Kahl, 1931
- Woodruffides Foissner, 1987

Order Sorogenida Foissner, 1985

Sorogenidae Bradbury & Olive, 1980

- Sorogena Bradbury & Olive, 1980

Incertae sedis in Class COLPODEA

Pseudoglaucoma Wenzel, 1953

- Rigchostoma Vuxanovici, 1963
- Telostomatella Foissner, 1985

Pseudochlamydonellidae Buitkamp et al., 1989

- Pseudochlamydonella Buitkamp, Song & Wilbert, 1989

Tectohymenidae Foissner, 1993

- Pseudokreyella Foissner, 1985
- Tectohymena Foissner, 1993

Class PROSTOMATEA Schewiakoff, 1896

Order Prostomatida Schewiakoff, 1896

Apsiktratidae Foissner, Berger & Kohmann, 1994

- Apsiktrata Foissner, Berger & Kohmann, 1994

Metacystidae Kahl, 1926

- Metacystis Cohn, 1866
- Pelatractus Kahl, 1930
- Vasicola Tatem, 1869

Order Prorodontida Corliss, 1974

Balanionidae Small & Lynn, 1985

- Balanion Wulff, 1922 [1919]

Colepidae Ehrenberg, 1838

- Baikalocoleps Obolkina, 1995
- Coleps Nitzsch, 1827
- Macrocoleps Obolkina, 1995
- Plagiopogon Stein, 1859
- Planicoleps Dragesco & Dragesco-Kernéis, 1991
- Tiarina Bergh, 1881

Holophryidae Perty, 1852

- Bursellopsis Corliss, 1960
- Holophrya Ehrenberg, 1831
- Pleurofragma Jankowski, 1976

Lagynidae Sola et al., 1990

- Lagynus Quennerstedt, 1867

Malacophryidae Foissner, 1980

- Malacophrys Kahl, 1926

Placidae Small & Lynn, 1985

- Placus Cohn, 1866
- Spathidiopsis Fabre-Domergue, 1889 [syn. of Plagiopogon or Placus]

Plagiocampidae Kahl, 1926

- Plagiocampa Schewiakoff, 1892 [1893]

Prorodontidae Kent, 1881

- Prorodon Ehrenberg, 1833 [1834]

Urotrichidae Small & Lynn, 1985

- Dissothigma Jankowski, 1976
- Rhagadostoma Kahl, 1926
- Urotricha Claparède & Lachmann, 1859

Incertae sedis in Class PROSTOMATEA

- Amphibothrella R. & L. Grandori, 1934
- Peridion Vuxanovici, 1962
- Peridionella Vuxanovici, 1963
- Cryptocaryon Brown, 1951

Class PLAGIOPYLEA Small & Lynn, 1985

Order Plagiopylida Small & Lynn, 1985

Plagiopylidae Schewiakoff, 1896

- Lechriopyla Lynch, 1930
- Paraplagiopyla Thurston & Grain, 1971
- Plagiopyla Stein, 1860
- Pseudoplagiopyla Small & Lynn, 1985

Sonderiidae Small & Lynn, 1985

- Parasonderia Fauré-Fremiet, 1973 [nomen nudum]
- Sonderia Kahl, 1928
- Sonderiella Kahl, 1928

Trimyemidae Kahl, 1926

- Trimyema Lackey, 1925

Class OLIGOHYMENOPHOREA de Puytorac et al., 1974

Subclass Peniculia Fauré-Fremiet in Corliss, 1956

Order Peniculida Fauré-Fremiet in Corliss, 1956

Suborder Frontoniina Small & Lynn, 1985

Clathrostomatidae Kahl, 1926

- Clathrostoma Penard, 1922

Frontoniidae Kahl, 1926

- Didieria Small & Lynn, 1985
- Disematostoma Lauterborn, 1894
- Frontonia Ehrenberg, 1838
- Frontoniella Wetzel, 1927 [syn. of Frontonia]
- Paraclathrostoma Small & Lynn, 1985
- Wenrichia Jankowski, 1967 [syn. of Disematostoma]

Incertae sedis in Family Frontoniidae

- Schistophrya Kahl, 1933
- Sigmostomum Gulati, 1925 [syn. of Frontonia]

Lembadionidae Jankowski in Corliss, 1979

- Lembadion Perty, 1849

Maritujidae Jankowski in Small & Lynn, 1985

- Marituja Gajewskaja, 1928

Stokesiidae Roque, 1961

- Parastokesia Jankowski, 1967 [syn. of Disematostoma]
- Stokesia Wenrich, 1929

Suborder Parameciina Jankowski in Small & Lynn, 1985

Parameciidae Dujardin, 1840

- Paramecium O.F. Müller, 1773

Incertae sedis in Family Parameciidae

- Physanter Jankowski, 1975

Neobursaridiidae Dragesco & Tuffrau, 1967

- Neobursaridium Balech, 1941

Urocentridae Claparède & Lachmann, 1858

- Urocentrum Nitzsch, 1827

Subclass Scuticociliatia Small, 1967

Order Philasterida Small, 1967

Cinetochilidae Perty 1852

- Cinetochilum Perty, 1849
- Platynematum Kahl, 1935 [Foissner, Berger & Kohmann, 1994; syn. of Colpodopsis]
- Pseudoplatynematum Bock, 1952
- Sathrophilus Corliss, 1960
- Sphenostomella Jankowski in Small & Lynn, 1985 [Jankowski, 1980]

Cohnilembidae Kahl, 1933

- Cohnilembus Kahl, 1933
- Porpostoma Moebius, 1888 [syn. of Helicostoma]

Cryptochilidae Berger in Corliss, 1979

- Biggaria Kahl, 1934 [Aescht, 2001]
- Biggariella Profant in Corliss, 1979 [nomen nudum]
- Cryptochilum Maupas, 1883
- Metaxystomium Berger in Corliss, 1979 [jun. syn. of Velistoma Jankowski, 1980]
- Metoikos Berger & Thompson in Corliss, 1979 [nomen nudum]
- Tanystomium Berger in Corliss, 1979
- Thigmozoon Santhakumari & Nair, 1973
- Velistoma Jankowski, 1980
- Yagiua Profant in Corliss, 1979 [nomen nudum]

Entodiscidae Jankowski, 1973

- Cryptochilidium Schouteden, 1906
- Entodiscus Madsen, 1931
- Pectenita Jankowski, 1973

Entorhipidiidae Madsen, 1931

- Entorhipidium Lynch, 1929

Loxocephalidae Jankowski, 1964

- Balanonema Kahl, 1931 [nomen nudum]
- Cardiostomatella Corliss, 1960
- Dexiotricha Stokes, 1885 [Foissner, Berger & Kohmann, 1994]
- Loxocephalus Eberhard, 1862
- Paradexiotricha Grolière, 1975
- Paraloxocephalus Small & Lynn, 1985
- Paratetrahymena Thompson, 1963

Orchitorphryidae Cépède, 1910

- Anophryoides de Puytorac & Grolière, 1979 [syn. of Paranophrys]
- Mesanophrys Small & Lynn, 1985 [S & L in Aescht, 2001]
- Metanophrys de Puytorac, Grolière, Roque & Detcheva, 1974
- Mugardia Small & Lynn, 1985 [jun. obj. syn. of Anophryoides]
- Orchitophrya Cépède, 1907
- Paranophrys Thompson & Berger, 1965

Paralembidae Corliss & de Puytorac in Small & Lynn, 1985

- Anophrys Cohn, 1866
- Cryptolembus Gunderson, 1985
- Magnalembus Small & Lynn, 1985
- Mesolembus Small & Lynn, 1985
- Ovolembus Small & Lynn, 1985
- Paralembus Kahl, 1933 [not available]

Parauronematidae Small & Lynn, 1985

- Glauconema Thompson, 1966
- Miamiensis Thompson & Moewus, 1964
- Parauronema Thompson, 1967
- Potomacus Thompson, 1966

Philasteridae Kahl, 1931

- Helicostoma Cohn, 1866
- Madsenia Kahl, 1934
- Paraphilaster Grolière, de Puytorac & Grain, 1980 [1978]
- Philaster Fabre-Domergue, 1885
- Philasterides Kahl, 1931

Pseudocohnilembidae Evans & Thompson, 1964

- Pseudocohnilembus Evans & Thomspon, 1964 [Foissner & Wilbert, 1981]

Thigmophryidae Chatton & Lwoff, 1926

- Cochliodomus Raabe, 1971
- Cochliophilus Kozloff, 1945
- Conchophyllum Raabe, 1936
- Myxophyllum Raabe, 1934
- Thigmophrya Chatton & Lwoff, 1923

Thyrophylacidae Berger in Corliss, 1961

- Plagiopyliella Polijansky, 1951
- Thyrophylax Berger in Corliss, 1961 [Lynn & Berger, 1973]

Uronematidae Thompson, 1964

- Homalogastra Kahl, 1926
- Pseuduronema Hoare, 1927
- Urocyclon Small & Lynn, 1985 [Song & Wilbert, 2000]
- Uronema Dujardin, 1841
- Uronemopsis Kahl, 1931
- Uropedalium Kahl, 1928

Urozonidae Grolière, 1975

- Urozona Schewiakoff, 1889

Sedis mutabilis in Order Philasterida

- Kahlilembus Grolière & Couteaux, 1984 [Foissner, Berger & Kohmann, 1994]

Incertae sedis in Order Philasterida

- Andreula Kahl, 1934
- Bizonula Corliss, 1960
- Colpodopsis Gourret & Roeser, 1888 [syn. of Platynematum]
- Cryptostomina Fedele, 1938
- Eurychilum André, 1910
- Gullmarella Fenchel, 1964
- Lembadionella Kahl, 1933
- Ptyssostoma Hentschel, 1927
- Pusilloburius Corliss, 1979
- Rhinodisculus Mansfeld, 1923
- Sertumia Tucolesco, 1962

Order Pleuronematida Fauré-Fremiet in Corliss, 1956

Calyptotrichidae Small & Lynn, 1985

- Calyptotricha Phillips, 1882

Conchophthiridae Kahl in Doflein & Reichenow, 1929

- Conchopththirus Stien, 1861
- Conchoscutum Raabe, 1947

Ctedoctematidae Small & Lynn, 1985

- Compsosomella Small & Lynn, 1985
- Ctedoctema Stokes, 1884
- Hippocomos Czapik & Jordan, 1977
- Paractedectema Small & Lynn, 1985

Cyclidiidae Ehrenberg, 1838

- Abathostoma Berger in Corliss, 1979 [jun. obj. syn. of Echinocyclidium]
- Cristigera Roux, 1899
- Cyclidium O.F. Müller, 1786 [1773]
- Echinocyclidium Jankowski, 1980
- Isocyclidium Esteban, Embley & Finlay, 1993
- Mesogymnus Berger in Corliss, 1979 [Berger, 1994]
- Paracyclidium Grolière, de Puytorac & Grain, 1980
- Paurotricha Dragesco & Dragesco-Kernéis, 1991 [syn. of Cristigera]
- Pseudocyclidium Small & Lynn, 1985

Dragescoidae Jankowski in Small & Lynn, 1985

- Dragescoa Jankowski, 1974

Histiobalantiidae de Pytorac & Corliss in Corliss, 1979

- Histiobalantium Stokes, 1886

Peniculistomatidae Fenchel, 1965

- Echinosociella Berger in Small & Lynn, 1985
- Mytilophilus Antipa & Dolan, 1985
- Peniculistoma Jankowski, 1964

Pleuronematidae Kent, 1881

- Pleurocoptes Wallengren, 1896
- Pleuronema Dujardin, 1836 [1841]
- Schizocalyptra Dragesco, 1968

Thigmocomidae Kazubski, 1958

- Thigmocoma Kazubski, 1958

Incertae sedis in Suborder Pleuronematina

- Larvulina Penard, 1922

Order Thigmotrichida Chatton & Lwoff, 1922

Ancistridae Issel, 1903

- Ancistrella Cheissin, 1930 [1931; nomen nudum]
- Ancistrum Maupas, 1883
- Ancistrumina Raabe, 1959
- Eupoterion MacLennan & Connell, 1931 [syn. of Ancistrum]
- Fenchelia Raabe, 1970
- Protophyra Kofoid, 1903
- Protophyropsis Raabe, 1959
- Semiboveria Raabe, 1970
- Syncilancistrumina Knight & Thorne, 1982

Hemispeiridae König, 1894

- Ancistrospira Chatton & Lwoff, 1926
- Boveria Stevens, 1901
- Cheissinia Chatton & Lwoff, 1949
- Hemispeira Fabre-Domergue, 1888
- Plagiospira Issel, 1903
- Proboveria Chatton & Lwoff, 1936
- Protospira Raabe, 1968 [Protospirella Aescht, 2001]

Hysterocinetidae Diesin, 1866

- Coelothigma de Puytorac, 1968 [1969]
- Cotylothigma Raabe, 1949
- Craticuloscuta Kozloff, 1965
- Drilocineta Raabe, 1972
- Elliptothigma Meier, 1954
- Eminothigma Jankowski in Corliss, 1979
- Epicharocotyle Kozloff, 1965
- Hysterocineta Diesing, 1866
- Kozloffia de Puytorac, 1968
- Kysthothigma Raabe, 1949
- Preptychostomum de Puytorac, 1968 [1969]
- Protoptychostomum Raabe, 1949
- Ptychostomum Stein, 1860
- Raabellocineta de Puytorac, Grolière & Grain, 1979
- Taeniocineta Raabe, 1972
- Thurstonia de Puytorac, 1968 [1969]

Paraptychostomidae Ngassam, de Puytorac & Grain, 1994

- Paraptychostomum Ngassam, de Puytorac & Grain, 1994

Protanoplophryidae Miyashita, 1929

- Protanoplophrya Miyashita, 1929

Incertae sedis in Subclass Scuticociliatia

- Agigea Lepsi, 1965 [nomen nudum]

Schizocaryidae Jankowski, 1979

- Schizocaryum Poljansky & Golikova, 1957

Subclass Hymenostomatia Delage & Hérouard, 1896

Order Hymenostomatida Delage & Hérouard, 1896

Suborder Tetrahymenina Fauré-Fremiet in Corliss, 1956

Curimostomatidae Jankowski, 1968

- Curimostoma Kozloff, 1954
- Dogielella Poljansky, 1925

Glaucomidae Corliss, 1971

- Bursostoma Vörösváry, 1950
- Chasmatostoma Engelmann, 1862 [syn. of Colpoda]
- Dichilum Schewiakoff, 1889 [1893]
- Epenardia Corliss, 1971
- Espejoia Bürger, 1908
- Glaucoma Ehrenberg, 1830
- Glaucomella Grolière, 1977
- Jaocorlissia Small & Lynn, 1985
- Monochilum Schewiakoff, 1893
- Physalophrya Kahl, 1931

Incertae sedis in Family Glaucomidae

- Dexiotrichides Kahl, 1951 [1931]
- Discozoon Vuxanovici, 1960
- Pinchatia Shibuya, 1931
- Pleurochilidium Stein, 1860

Spirozonidae Kahl, 1926

- Spirozona Kahl, 1926
- Stegochilum Schewiakoff, 1893

Trichospiridae Kahl, 1926

- Trichospira Roux, 1899

Tetrahymenidae Corliss, 1952

- Deltopylum Fauré-Fremiet & Mugard, 1946
- Lambornella Keilin, 1921
- Tetrahymena Furgason, 1940 [Lwoff, 1947?]

Turaniellidae Didier, 1971

- Colpidium Stein, 1860
- Dexiostoma Jankowski, 1967
- Turaniella Corliss, 1960

Suborder Ophryoglenina Canella, 1964

Ichthyophthiriidae Kent, 1881

- Ichthyophthirioides Roque & de Puytorac, 1966 [syn. of Ichthyophthirius]
- Ichthyophthirius Fouquet, 1876

Ophryoglenidae Kent, 1881

- Ophryoglena Ehrenberg, 1831
- Protophryoglena Mugard, 1949 [syn. of Ophryoglena]

Incertae sedis in Order Hymenostomatida

- Blepharostoma Schewiakoff, 1893 [1892; nomen nudum]

Subclass Apostomatia Chatton & Lwoff, 1928

Order Apostomatida Chatton & Lwoff, 1928

Colliniidae Cépède, 1910

- Collinia Cépède, 1910
- Metacollinia Jankowski, 1980

Cyrtocaryidae Corliss, 1979

- Cyrtocaryum Fauré-Fremiet & Mugard, 1949

Incertae sedis in Family Cyrtocaryidae

- Spirobuetschliella Hovasse, 1950

Foettingeriidae Chatton, 1911

- Calospira Chatton & Lwoff, 1935
- Foettingeria Caullery & Mesnil, 1903
- Gymnodinioides Minkiewicz, 1912
- Hyalophysa Bradbury, 1966
- Hyalospira Miyashita, 1933 [syn. of Gymnodinioides]
- Metaphrya Ikeda, 1917
- Ophiuraespira Chatton & Lwoff, 1930
- Pericaryon Chatton, 1911
- Phoretophrya Chatton, A. & M. Lwoff, 1930
- Phtorophrya Chatton, A. & M. Lwoff, 1930
- Polyspira Minkiewicz, 1912
- Rosea de Puytorac in Corliss, 1979 [nomen nudum]
- Spirophrya Chatton & Lwoff, 1924
- Synophrya Chatton & Lwoff, 1926
- Terebrospira Debaisieux, 1960
- Traumatiophtora Chatton & Lwoff, 1930 [1931]
- Vampyrophrya Chatton & Lwoff, 1930 [1931]

Incertae sedis in Family Foettingeriidae

- Jeppsia Corliss, 1960
- Kofoidella Cépède, 1910
- Perezella Cépède, 1910

Order Astomatophorida Jankowski, 1966

Opalinopsidae Hartog, 1906

- Chromidina Gonder, 1905
- Opalinopsis Foettinger, 1881

Order Pilisuctorida Jankowski, 1966

Conidophryidae Kirby, 1941

- Ascophrys Campillo & Deroux, 1974
- Askoella Fenchel, 1965
- Conidophrys Chatton & Lwoff, 1934

Subclass Peritrichia Stein, 1859

Order Sessilida Kahl, 1933

Astylozoidae Kahl, 1935

- Astylozoon Engelmann, 1862
- Hastatella Erlanger, 1890

Ellobiophryidae Chatton & Lwoff, 1923

- Caliperia Laird, 1953
- Clausophrya Naidenova & Zaika, 1969 [syn. of Ellobiophrya]
- Ellobiophrya Chatton & Lwoff, 1923

Epistylididae Kahl, 1933

- Apiosoma Blanchard, 1885
- Campanella Goldfuss, 1820
- Epistylis Ehrenberg, 1830
- Heteropolaria Foissner & Schubert, 1977
- Nidula Gajewskaja, 1933 [syn. of Epistylis]
- Opisthostyla Stokes, 1886 [syn. of Rhabdostyla]
- Rhabdostyla Kent, 1881

Incertae sedis in Family Epistylididae

- Systylis Bresslau, 1919

Lagenophryidae Bütschli, 1889

- Circolagenophrys Jankowski, 1980 [syn. of Lagenophrys]
- Clistolagenophrys Clamp, 1991
- Lagenophrys Stein, 1851 [1852]
- Operculigera Kane, 1969
- Paralagenophrys Clamp, 1987
- Setonophrys Jankowski, 1986
- Stylohedra Kellicott, 1884 [syn. of Lagenophrys]

Incertae sedis in Family Lagenophryidae

- Eilymophrys Corliss, 1979

Operculariidae Fauré-Fremiet in Corliss, 1979

- Ampullaster Jankowski, 1976 [not available]
- Ballodora Dogiel & Furssenko, 1921 [nomen dubium]
- Bezedniella Stloukal & Matis, 1994
- Opercularia Goldfuss, 1820
- Operculariella Stammer, 1948
- Orbopercularia Lust, 1950 [Guhl, 1979]
- Propyxidium Corliss, 1979

Incertae sedis in Family Operculariidae

- Orsomia Baer, 1952

Ophrydiidae Ehrenberg, 1838

- Gerda Claparède & Lachmann, 1858
- Ophrydium Bory de St. Vincent, 1826 [1824]

Opisthonectidae Foissner, 1976

- Opisthonecta Fauré-Fremiet, 1906
- Telotrochidium Kent, 1881

Rovinjellidae Mathes, 1972

- Rovinjella Matthes, 1972

Scyphidiidae Kahl, 1933

- Ambiphrya Raabe, 1952
- Gonzeella Kufferath, 1953
- Ophrydiopsis Penard, 1922 [syn. of Scyphidiella]
- Paravorticella Kahl, 1933
- Scyphidia Dujardin, 1841

Incertae sedis in Family Scyphidiidae

- Pachystomos Rudzinska, 1952

Termitophryidae Lom in Corliss, 1979

- Termitophrya Noirot & Noirot-Timothée, 1959

Usconophryidae Clamp, 1991

- Usconophrys Jankowski, 1985

Vaginicolidae de Fromentel, 1874

- Caulicola Stokes, 1894 [syn. of Pyxicola]
- Cothurnia Ehrenberg, 1831
- Cothurniopsis Entz, Sr., 1884 [Stokes, 1893]
- Pachytrocha Kent, 1882 [syn. of Cothurnia]
- Platycola Kent, 1882
- Pseudothuricola Kahl, 1935
- Pyxicola Kent, 1882
- Thuricola Kent, 1881
- Vaginicola Lamarck, 1816 [Ehrenberg, 1838]

Incertae sedis in Family Vaginicolidae

- Cyclodonta Matthes, 1958

Vorticellidae Ehrenberg, 1838

- Carchesium Ehrenberg, 1830 [1831]
- Entziella Stiller, 1951
- Haplocaulus Precht, 1935 [Warren, 1988]
- Intranstylum Fauré-Fremiet, 1904
- Myoschiston Precht, 1935 [Jankowski, 1985]
- Parazoothamnium Piesik, 1975
- Planeticovorticella Clamp & Coats, 2000
- Pseudocarchesium Sommer, 1951 [nomen nudum]
- Pseudovorticella Foissner & Schiffmann, 1975
- Rugaecaulis Lom in Corliss, 1979 [Lom & de Puytorac, 1994]
- Ruthiella Schödel, 1983
- Tucolesca Lom in Corliss, 1979
- Vorticella Linnaeus, 1767

Incertae sedis in Family Vorticellidae

- Monintranstylum Banina, 1976 [Jankowski, 1993]

Zoothamniidae Sommer, 1951

- Craspedomyoschiston Precht, 1935
- Zoothamniun Bory de St. Vincent, 1826

Order Mobilida Kahl, 1933

Leiotrochidae Johnston, 1938

- Leiotrocha Fabre-Domergue, 1888 [syn. of Cyclochaeta]

Polycyclidae Poljansky, 1951

- Polycycla Polijansky, 1951

Trichodinidae Claus, 1874

- Dipartiella G. Stein, 1961
- Hemitrichodina Basson & Van As, 1989
- Pallitrichodina Van As & Basson, 1993 [V A & B in Aescht, 2001]
- Paratrichodina Lom, 1963
- Semitrichodina Kazubski, 1958
- Trichodina Ehrenbeg, 1830
- Trichodinella Sràmek-Husek, 1953
- Tripartiella Lom, 1959 [Raabe, 1963; syn. of Semitrichodina]
- Vauchomia Mueller, 1938

Incertae sedis in Family Trichodinidae

- Acyclochaeta Zick, 1928 [syn. of Trichodina]

Trichodinopsidae Kent, 1881

- Trichodinopsis Claparède & Lachmann,1858 [syn. of Urceolaria]

Urceolariidae Dujardin, 1840

- Urceolaria Stein, 1854 [1867]

Subclass Astomatia Schewiakoff, 1896

Order Astomatida Schewiakoff, 1896

Anoplophryidae Cépède, 1910

- Almophrya de Puytorac & Dragesco, 1969
- Anoplophyra Stein, 1860
- Corlissiella de Puytorac, 1960
- Herpetophrya Siedlecki, 1902
- Lomiella de Puytorac, 1961 [de Puytorac & Rakotoarivelo, 1965; nomen nudum]
- Lubetiella de Puytorac, 1959 [nomen nudum]
- Metastomum Georgévitch, 1941
- Njinella Ngassam, 1983
- Paranoplophrya Rohrbach, 1936
- Perseia Rossolimo, 1926
- Prototravassosia Artigas & Unti, 1938
- Sigmophrya de Puytorac, 1971

Buetschliellidae de Puytorac in Corliss, 1979

- Anoplophryopsis de Puytorac, 1954
- Buetschliella Awerinzew, 1908
- Herpinella de Puytorac, 1954
- Rhizocaryum Caullery & Mesnil, 1907

Clausilocolidae de Puytorac in Corliss, 1979

- Clausilocola Lom, 1959
- Haptophryopsis de Puytorac, 1971
- Proclausilocola Lom, 1959

Contophryidaae de Puytorac, 1972

- Contophyra de Puytorac & Dragesco, 1968 [1969]
- Dicontophrya de Puytorac & Dragesco, 1968 [1969]

Haptophryidae Cépède, 1910

- Annelophrya Lom, 1959
- Cepedietta Kay, 1942
- Haptophrya Stein, 1867
- Lachmannella Cépède, 1910
- Steinella Cépède, 1910

Hoplitophryidae Cheissein, 1930

- Akidodes Lom, 1959 [Lom in Aescht, 2001]
- Anglasia Delphy, 1938 [1936]
- Buetschliellopsis de Puytorac, 1954
- Delphyella de Puytorac, 1969
- Hoplitophrya Stein, 1859 [1860]
- Jirovecella Lom, 1957
- Juxtamesnilella de Puytorac, 1954 [1969]
- Juxtaradiophrya de Puytorac, 1954 [1957]
- Mesnilella Cépède, 1910
- Mixtophrya de Puytorac, 1969
- Protoradiophryopsis Georgévitch, 1950
- Radiophryoides Lom, 1956

Intoshellinidae Cépède, 1910

- Intoshellina Cépède, 1910
- Monodontophrya Vejdovsky, 1892

Maupasellidae Cépède, 1910

- Acanthophrya Heidenreich, 1935
- Buchneriella Heidenreich, 1935
- Georgevitchiella de Puytorac, 1957
- Maupasella Cépède, 1910

Radiophryidae de Puytorac, 1972

- Acanthodiophrya de Puytorac & Dragesco, 1968 [1969]
- Anthonyella Delphy, 1936
- Cheissiniophrya de Puytorac & Dragesco, 1969 [misspelled in Corliss, 1979?]
- Coelophrya de Puytorac & Dragesco, 1968 [1969]
- Desmophrya Raabe, 1933
- Dicoelophrya de Puytorac & Dragesco, 1968 [1969]
- Durchoniella de Puytorac, 1954
- Eudrilophrya de Puytorac, 1971 [1969, 1970?]
- Helella Kaczanowski, 1961 [Helellophrya Aescht, 2001]
- Hovasseiella de Puytorac, 1955
- Metaracoelophrya de Puytorac & Dragesco, 1969
- Metaradiophrya Heidenreich, 1935 [nomen nudum]
- Mimophrya de Puytorac, 1969
- Mrazekiella Kijenskij, 1925 [1926]
- Ochridanus Georgévitch, 1941
- Paracoelophrya de Puytorac, 1969 [nomen nudum]
- Radiophrya Rossolimo, 1926
- Radiophryopsis Georgévitch, 1941

Sedis mutabilis in Class OLIGOHYMENOPHOREA

Azeridae Alekperov, 1985

- Azerella Alekperov, 1985

Nucleocorbulidae Santhakumari & Nair, 1970

- Nucleocorbula Santhakumari & Nair, 1970

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]