chromalveolates see Supergroup Chromalveolata Adl et al., 2005
   Kingdom Protozoa Goldfuss, 1818 - protozoa
     Infrakingdom Alveolata Cavalier-Smith, 1991 see [unranked] Alveolata Cavalier-Smith, 1991
       Phylum Ciliophora Doflein, 1901 - ciliates
         Subphylum Intramacronucleata Lynn, 1996 - amphiesmates
           1 Infraphylum Spirotrichia Bütschli, 1889 [monotypic]
           2 Infraphylum Rhabdophora [monotypic]
           3 Infraphylum Ventrata Cavalier-Smith, 2004