Phylum Parabasalia Honigberg, 1973 see Infraphylum Parabasalia Honigberg, 1973
Count: [*] 6c;7o;16f;90g;15s [10 Dec 2023]
   Class Trichonymphea Hartmann, 1911
  Count: [*] 1o;5f;16g
     Order Trichonymphida Hartmann, 1911
    Count: [*] 5f;16g
       Family Spirotrichosomidae Hollande & Carruette-Valentin, 1971
      Count: [*] 6g
         1 Genus Spirotrichosomaᵀ Sutherland, 1933
        Count: -
         2 Genus Macrospironympha Cleveland, Hall, Sanders & Collier, 1934
        Count: -
         3 Genus Leptospironympha Cleveland, Hall, Sanders & Collier, 1934
        Count: -
         4 Genus Apospironympha Cleveland & Day, 1958
        Count: -
         5 Genus Colospironympha Cleveland & Day, 1958
        Count: -
         6 Genus Bispironympha Bobyleva, 1969
        Count: -