organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain eukaryotes see Domain Eukaryota Chatton, 1925
     alveolates Cavalier-Smith see [unranked] Alveolata Cavalier-Smith, 1991
       Phylum Ciliophora Doflein, 1901 - ciliates
         Subphylum Intramacronucleata Lynn, 1996 - amphiesmates
           Class Spirotrichea Bütschli, 1889
             Subclass Stichotrichia Small & Lynn, 1985
               Order Sporadotrichida Fauré-Fremiet, 1961
                 Family Oxytrichidae Ehrenberg, 1838
                   01 Genus Ancystropodium Fauré-Fremiet, 1908
                   02 Genus Pleurotricha Stein, 1859
                   03 Genus Histriculus Corliss, 1960
                   04 Genus Parastylonychia Dragesco, 1963
                   05 Genus Tachysoma Stokes, 1887
                   06 Genus Laurentiella Dragesco & Njiné, 1972
                   07 Genus Onychodromus Stein, 1859
                   08 Genus Coniculostomum Njiné, 1979
                   09 Genus Onychodromopsis Stokes, 1887
                   10 Genus Cyrtohymena Foissner, 1987
                   11 Genus Pseudostrombidium Horváth, 1933
                   12 Genus Sterkiella Foissner et al., 1991
                   13 Genus Notohymena Blatterer & Foissner, 1988
                   14 Genus Steinia Diesing, 1866
                   15 Genus Australocirrus Blatterer & Foissner, 1988
                   16 Genus Stylonychia Ehrenberg, 1830
                   17 Genus Urosoma Kowalewski, 1882
                   18 Genus Urosomoida Hemberger, in Foissner, 1982
                   19 Genus Oxytricha Bory, 1824