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 Anaeromonada Cavalier-Smith, 1997 [monotypic]
                       Class Anaeromonadeaᵀ Cavalier-Smith, 1997
                         Order Oxymonadida Grassé, 1952 - oxymonads
                           1 Family Oxymonadidaeᵀ Kirby, 1928
                           2 Family Pyrsonymphidae Grassi, 1892
                           3 Family Streblomastigidae Kofoid & Swezy, 1919 [monotypic]
                           4 Family Saccinobaculidae Cavalier-Smith, 2012
                           5 Family Polymastigidae Bütschli, 1884