Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade discaria Cavalier-Smith, 2021
                 Clade natates Cavalier-Smith, 2021
                   Phylum Metamonada Grassé, 1952 [coordinate rank]
                     Subphylum Trichozoa Cavalier-Smith, 1997
                       Infraphylum Parabasalia Honigberg, 1973
                         Class Trichonymphea Hartmann, 1911
                           Order Trichonymphidaᵀ Hartmann, 1911
                             Family Hoplonymphidae Light, 1926
                               1 Genus Barbulanympha Cleveland, Hall, Sanders & Collier, 1934
                               2 Genus Hoplonymphaᵀ Light, 1926 [monotypic]
                               3 Genus Rhynchonympha Cleveland, Hall, Sanders & Collier, 1934
                               4 Genus Urinympha Cleveland, Hall, Sanders & Collier, 1934