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 Myzozoa Cavalier-Smith & Chao, 2004 see Subphylum Myzozoa Cavalier-Smith & Chao, 2004
         Subphylum Apicomplexa Levine, 1970 see Infraphylum Apicomplexa Levine, 1970
           Infraphylum Sporozoa Leuckart, 1879 see Superclass Sporozoa Leuckart, 1879
             Class Gregarinea Bütschli, 1882 see Subclass Gregarinasina Dufour, 1828
               Genus Monocystis Stein, 1848