organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain eukaryotes see Domain Eukaryota Chatton, 1925
     flagellated protists
       Phylum Parabasalia Honigberg, 1973 see Infraphylum Parabasalia Honigberg, 1973
         Class Hypermastigia see Superclass Parabasalia Honigberg, 1973
           Order Spirotrichonymphida Grassé, 1952
             Family Spirotrichonymphidae Grassi, 1917 see Family Holomastigotoididae Copeland, 1956
               1 Genus Spirotrichonympha Grassi, 1911
               2 Genus Spirotrichonymphella Grassi, 1917
               3 ?Genus Spironympha Koidzumi, 1917
               4 Genus Microspironympha Koidzumi, 1921 see Genus Spironympha Koidzumi, 1917
               5 ?Genus Micromastigotes Hollande & Carruette-Valentin, 1971