life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukarya Chatton, 1925 see Domain Eukaryota Chatton, 1925
     Kingdom Protoctista Hogg, 1860
       "alveolates" Cavalier-Smith see [unranked] Alveolata Cavalier-Smith, 1991
         Phylum Ciliophora Doflein, 1901 - ciliates
           Subphylum Cyrtophora see Subphylum Intramacronucleata Lynn, 1996
             Class Oligohymenophora see Class Oligohymenophorea de Puytorac et al., 1974
               1 Subclass Scuticociliatida (E.B. Small, 1967) see Subclass Scuticociliatia (E.B. Small, 1967)
               2 Subclass Peritrichia Stein, 1859