[living organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryota Whittaker & Margulis, 1978 see Domain Eukaryota Chatton, 1925
     Kingdom Protozoa Goldfuss, 1818 - protozoa
       Subkingdom Eozoa Cavalier-Smith, 1997 see Infrakingdom Eozoa Cavalier-Smith, 1997
         Infrakingdom Excavata T. Cavalier-Smith, 2002 see Supergroup Excavata Cavalier-Smith, 2002
           Phylum Metamonada Grassé, 1952
             Class Trichomonadea Kirby, 1947
               1 Order Cristamonadida Brugerolle & Patterson, 2001
               2 Order Spirotrichonymphida Grassé, 1952
               3 Order Trichomonadida Kirby, 1947 - trichomonads
               4 Order Tritrichomonadida Cepicka, Hampl & Kulda, 2010 - tritrichomonadids