Kingdom Protista (Haeckel, 1866) - protists
   Phylum Sarcomastigophora Honigberg & Balamuth, 1963
     Subphylum Mastigophora Diesing, 1866 - flagellates
       Class Zoomastigophorea - "animal-like" flagellates see Phylum Zoomastigina
         1 Order Choanoflagellida Kent, 1880 - choanoflagellates see Class Choanoflagellatea Cavalier-Smith, 1998
         2 Order Kinetoplastida Honigberg, 1963 - kinetoplastids see Order Kinetoplastea Honigberg, 1963
         3 Order Retortamonadida Grassé, 1952 - retortamonads
         4 Order Diplomonadida Wenyon, 1926 - diplomonads
         5 Order Trichomonadida Kirby, 1947 - trichomonads
         6 Order Hypermastigida Grassi, 1911 - hypermastigids see Class Hypermastigia
         7 Genus Stephanopogon G. Entz, 1884