1. Genus Amphisiellides Foissner, 1988
2. Genus Ancystropodium Fauré-Fremiet, 1907
3. Genus Apoamphisiella Foissner, 1997
4. Genus Gastrostyla Engelmann, 1862
5. Genus Hemigastrostyla Song & Wilbert, 1997
6. Genus Kerona Müller, 1786
7. Genus Neokeronopsis Warren, Fyda & Song, 2002
8. Subfamily Oxytrichinae Ehrenberg, 1838
   1. Genus Allotricha Sterki, 1878
   2. Genus Australocirrus Blatterer & Foissner, 1988
   3. Genus Cyrtohymena Foissner, 1989
   4. Genus Notohymena Blatterer & Foissner, 1988
   5. Genus Onychodromopsis Stokes, 1887
   6. Genus Oxytricha Bory de Saint-Vincent, 1824
   7. Genus Parurosoma Gelei, 1954
   8. Genus Pseudostrombidium Horváth, 1933
   9. Genus Rubrioxytricha Berger, 1999
   10. Genus Tachysoma Stokes, 1887
   11. Genus Urosoma Kowalewskiego, 1882
   12. Genus Urosomoida Hemberger in Foissner, 1982
   13. Genus Actinotricha Cohn, 1866 accepted as Oxytricha Bory de Saint-Vincent, 1824
   14. Genus Opisthotricha Kent, 1881 accepted as Oxytricha Bory de Saint-Vincent, 1824 (synonym)
   15. Genus Opistotricha accepted as Opisthotricha Kent, 1881 accepted as Oxytricha Bory de Saint-Vincent, 1824 (incorrect subsequent spelling)
   16. Genus Oxitricha accepted as Oxytricha Bory de Saint-Vincent, 1824 (incorrect subsequent spelling)
9. Genus Paraurostyla Borror, 1972
10. Genus Parentocirrus Voß, 1997
11. Genus Ponturostyla Jankowski, 1989
12. Genus Pseudouroleptus Hemberger, 1985
13. Subfamily Stylonychinae Berger & Foissner, 1997
    1. Genus Coniculostomum Njiné, 1979
    2. Genus Histriculus Corliss, 1960
    3. Genus Laurentiella Dragesco & Njine, 1971
    4. Genus Onychodromus Stein, 1859
    5. Genus Parastylonychia Dragesco, 1963
    6. Genus Patersoniella Foissner, 1987
    7. Genus Pleurotricha Stein, 1859
    8. Genus Rigidocortex Berger, 1999
    9. Genus Rigidohymena Berger, 2011
    10. Genus Steinia Diesing, 1866
    11. Genus Sterkiella Foissner, Blatterer, Berger & Kohmann, 1991
    12. Genus Stylonychia Ehrenberg, 1830
    13. Genus Histrio Sterki, 1878 accepted as Histriculus Corliss, 1960
    14. Genus Laurentia Dragesco, 1966 accepted as Laurentiella Dragesco & Njine, 1971
    15. Genus Parahistriculus Grolière, 1975 accepted as Histriculus Corliss, 1960
    16. Genus Stylonichea Ehrenberg, 1830 accepted as Stylonychia Ehrenberg, 1830 (incorrect subsequent spelling)
    17. Genus Stylonichia Ehrenberg, 1830 accepted as Stylonychia Ehrenberg, 1830
14. Genus Territricha Berger & Foissner, 1988
15. Genus Urostyloides Shi & He, 1989
16. Genus Alastor Perty, 1852 accepted as Kerona Müller, 1786
17. Genus Mixotricha Dragesco & Dragesco-Kernéis, 1986 accepted as Ponturostyla Jankowski, 1989
18. Genus Nothopleurotricha Diesing, 1866 accepted as Gastrostyla Engelmann, 1862

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