Phylum Parabasalia Honigberg, 1973 see Infraphylum Parabasalia Honigberg, 1973
   Class Trichonymphea Hartmann, 1911
     Order Trichonymphida Hartmann, 1911
       Family Staurojoeninidae Grassi, 1917
         1 Genus Staurojoeninaᵀ Kirby, 1926
         2 Genus Idionympha Cleveland, Hall, Sanders & Collier, 1934