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 Urostylida Jankowski, 1979
                 Family Urostylidaeᵀ Bütschli, 1889
                   01 Genus Notocephalus Petz et al., 1995
                   02 Genus Eschaneustyla Stokes, 1886
                   03 Genus Birojima Berger & Foissner, 1989
                   04 Genus Urostyla Ehrenberg, 1830
                   05 Genus Australothrix Blatterer & Foissner, 1988
                   06 Genus Paruroleptus Kahl, 1932 see Genus Uroleptus Ehrenberg, 1831[1832]
                   07 Genus Parabakuella Song & Wilbert, 1988
                   08 Genus Bakuella Agamaliev & Alekperov, 1976
                   09 Genus Holosticha Wrzesniowski, 1877
                   10 Genus Territricha Berger & Foissner, 1988