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
           Infraphylum Ventrata Cavalier-Smith, 2004
             1 Class Phyllopharyngea de Puytorac et al., 1974
             2 Class Colpodea Small & Lynn, 1981
             3 Class Nassophorea Small & Lynn, 1981
             4 Class Prostomatea Schewiakoff, 1896
             5 Class Plagiopylea Small & Lynn, 1985
             6 Class Oligohymenophorea de Puytorac et al., 1974 - oligohymenophoreans