Kingdom Protozoa Goldfuss, 1818 - protozoa Subkingdom Corticata Lankester, 1878 see Subkingdom Biciliata Infrakingdom Excavata T. Cavalier-Smith, 2002 see Supergroup Excavata Cavalier-Smith, 2002 Infrakingdom Loukozoa Cavalier-Smith, 1999 see Superphylum Loukozoa (Cavalier-Smith, 1999) Cavalier-Smith, 2002