Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] 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 Trichomonadea Kirby, 1947
                           Order Tritrichomonadida Cepicka, Hampl & Kulda, 2010 - tritrichomonadids
                             Family Monocercomonadidae Kirby, 1944 [monotypic]
                               0.1 [Subfamily Chilomitinae Honigberg, 1963]
                               0.2 [Subfamily Hypotrichomonadinae Honigberg, 1963] see Family Hypotrichomonadidae Honigberg, 1963
                               1 Genus Monocercomonasᵀ Grassi, 1879
                               n.0 [Subfamily Monocercomonadinaeᵀ Kirby, 1944] see Family Monocercomonadidae Kirby, 1944