[living organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryota Whittaker & Margulis, 1978 see Domain Eukaryota Chatton, 1925
     Kingdom Chromista Caval.-Sm. (1981) - chromists
       Subkingdom Harosa Cavalier-Smith, 2010
         Infrakingdom Halvaria Cavalier-Smith, 2010
           Superphylum Alveolata Cavalier-Smith, 1991
             Phylum Ciliophora Doflein, 1901 - ciliates
               Subphylum Intramacronucleata Lynn, 1996 - amphiesmates
                 Class Spirotrichea Bütschli, 1889
                   Subclass Oligotrichia Bütschli, 1889 [monotypic]
                     1 Order Strombidiida Petz & Foissner, 1992