[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Eukaryota Chatton, 1925 - eukaryotes see Domain Eukaryota Chatton, 1925
     Supergroup Excavata Cavalier-Smith, 2002 see [unranked] Excavata Cavalier-Smith, 2002
       Parabasalia Honigberg, 1973 see Infraphylum Parabasalia Honigberg, 1973
         Spirotrichonymphida Light, 1927
           1 Genus Holomastigotes Grassi, 1892
           2 Genus Holomastigotoides Grassi, 1911
           3 Genus Microjoenia Grassi, 1892
           4 Genus Spironympha Koidzumi, 1917
           5 Genus Spirotrichonympha Grassi, 1911