eukaryotes see Domain Eukaryota Chatton, 1925
   Kingdom Protozoa Goldfuss, 1818 [paraphyletic] - protozoa
     Subkingdom Eozoa Cavalier-Smith, 1997 [paraphyletic] see Infrakingdom Eozoa Cavalier-Smith, 1997
       Infrakingdom Excavata T. Cavalier-Smith, 2002 [paraphyletic] see Supergroup Excavata Cavalier-Smith, 2002
         Phylum Loukozoa Cavalier-Smith, 1999 [paraphyletic]
           Subphylum Metamonada Grassé, 1952 see Phylum Metamonada Grassé, 1952
             Infraphylum Anaeromonada Cavalier-Smith, 1997 see Subphylum Anaeromonada Cavalier-Smith, 1997
               Class Anaeromonadea Cavalier-Smith, 1997
                 Order Oxymonadida Grassé, 1952 - oxymonads
                   1 Family Oxymonadidae 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