Kingdom Protozoa Goldfuss, 1818 - protozoa
Count: 5p;16c;30o;4f;64g
   Subkingdom Corticata Lankester, 1878 see Subkingdom Biciliata
  Count: 4p;14c;26o;3f;57g
     Infrakingdom Excavata T. Cavalier-Smith, 2002 see Supergroup Excavata Cavalier-Smith, 2002
    Count: [o] 4p;14c;26o;3f;57g
       Superphylum Eozoa Cavalier-Smith, 1997 see Infrakingdom Eozoa Cavalier-Smith, 1997
      Count: [o] 2p;8c;13o;3f;23g
         Phylum Metamonada Grassé, 1952
        Count: [o] 6c;11o;1f;19g
           Subphylum Trichozoa Cavalier-Smith, 1997
          Count: [o] 5c;9o;1f;16g
             Superclass Eopharyngia (Cavalier-Smith, 1993) Cavalier-Smith, 2003
            Count: [o] 2c;4o;8g
               Class Trepomonadea Cavalier-Smith, 1993
              Count: [g] 3o;6g
                 Subclass Diplozoa (Dangeard, 1910) Cavalier-Smith, 1996 - diplomonads see Order Diplomonadida Wenyon, 1926
                Count: [g] 2o;5g
                   Order Distomatida Klebs, 1892 see Subfamily Hexamitinae Kent, 1880
                  Count: [g] 3g
                     Genus Spironucleus Lavier, 1936
                    Count: -