eukaryotes see Domain Eukaryota Chatton, 1925
   Kingdom Protozoa Goldfuss, 1818 [paraphyletic] - protozoa
     Subkingdom Sarcomastigota Cavalier-Smith, 1983 [paraphyletic] see [unranked] dorsates Cavalier-Smith, 2021
       Phylum Amoebozoa Lühe, 1913
         Subphylum Conosa Cavalier-Smith, 1998 see Infraphylum Conosa Cavalier-Smith, 1998
           Infraphylum Archamoebae Cavalier-Smith, 1983 [monotypic] see Class Archamoebea Cavalier-Smith, 1983
             Class Archamoebea Cavalier-Smith, 1983
               Order Mastigamoebida Frenzel, 1892 see Order Rhizomastigida Doflein, 1916
                 Family Mastigamoebidae Goldschmidt, 1907 [paraphyletic?]
                   1 Genus Mastigamoeba Schulze, 1875
                   2 Genus Phreatamoeba Chávez et al., 1986 see Genus Mastigamoeba Schulze, 1875
                   3 Genus Mastigella Frenzel, 1897