Kingdom Protozoa Goldfuss, 1818 - protozoa
   Subkingdom Corticata Lankester, 1878 see Subkingdom Biciliata
     Infrakingdom Alveolata Cavalier-Smith, 1991 see [unranked] Alveolata Cavalier-Smith, 1991
       1 Genus Prorocentrum Ehrenb. (1834)
       2 Genus Perkinsus Levine, 1978
       3 Genus Theileria Bettencourt, Franca & Borges, 1907
       4 Genus Oxytricha Bory, 1824
       5 Phylum Miozoa Cavalier-Smith, 1987
       6 Phylum Ciliophora Doflein, 1901 - ciliates