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 Oligotrichia Bütschli, 1889
               1 Order Halteriida Petz & Foissner, 1992 see Order Sporadotrichida Fauré-Fremiet, 1961
               2 Order Strombidiida Petz & Foissner, 1992