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 Trachelostylidae Small & Lynn, 1985
                   1 Genus Terricirra Berger & Foissner, 1989
                   2 Genus Hemisincirra Hemberger, 1985
                   3 Genus Trachelostyla Kahl, 1932
                   4 Genus Lamtostyla Buitkamp, 1977
                   5 Genus Gonostomum Sterki, 1878