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 Phylum Parabasalia Honigberg, 1973 see Infraphylum Parabasalia Honigberg, 1973 Genus Trichomonas Donné, 1836 Trichomonas vaginalis