Kingdom Protozoa Goldfuss, 1818 - protozoa
   Subkingdom Gymnomyxa (Lankester, 1878) Cavalier-Smith, 2002 see Kingdom Protozoa Goldfuss, 1818
     Infrakingdom Sarcomastigota Cavalier-Smith, 1983 see Subkingdom Sarcomastigota Cavalier-Smith, 1983
       Phylum Amoebozoa Lühe, 1913
         Subphylum Conosa Cavalier-Smith, 1998 see Infraphylum Conosa Cavalier-Smith, 1998
           Infraphylum Archamoebae Cavalier-Smith, 1983 see Class Archamoebea Cavalier-Smith, 1983
             Genus Phreatamoeba Chávez et al., 1986 see Genus Mastigamoeba Schulze, 1875
               Phreatamoeba balamuthi see Mastigamoeba balamuthi