Phylum Parabasalia Honigberg, 1973 see Infraphylum Parabasalia Honigberg, 1973
   Class Trichonymphea Hartmann, 1911
     Order Trichonymphida Hartmann, 1911
       1 Family Hoplonymphidae Light, 1926
       2 Family Staurojoeninidae Grassi, 1917
       3 Family Trichonymphidae Kent, 1880
       4 Family Teranymphidae Koidzumi, 1921
       5 Family Spirotrichosomidae Hollande & Carruette-Valentin, 1971