Kingdom Protozoa Goldfuss, 1818 - protozoa
   Subkingdom Corticata Lankester, 1878 see Subkingdom Biciliata
     Infrakingdom Excavata T. Cavalier-Smith, 2002 see Supergroup Excavata Cavalier-Smith, 2002
       Superphylum Archezoa Cavalier-Smith, 1983 see Infrakingdom Archezoa Cavalier-Smith, 1983
         1 Phylum Metamonada Grassé, 1952
         2 Phylum Parabasalia Honigberg, 1973 see Infraphylum Parabasalia Honigberg, 1973