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 Discicristata Cavalier-Smith, 1998
Phylum Euglenozoa Cavalier-Smith, 1981
Subphylum Plicostoma Patterson, 1988 ex T. Cavalier-Smith, 1998
see Phylum Euglenozoa Cavalier-Smith, 1981
Class Diplonemea Cavalier-Smith, 1993
1 Order Diplonemida Cavalier-Smith, 1993