life see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Empire Eukaryota (Chatton, 1925) see Domain Eukaryota Chatton, 1925
     Superkingdom Archezoa Cavalier-Smith, 1983 [monotypic] see Infrakingdom Archezoa Cavalier-Smith, 1983
       Kingdom Archezoa Cavalier-Smith, 1983 see Infrakingdom Archezoa Cavalier-Smith, 1983
         Phylum Archamoebae Cavalier-Smith, 1983 [monotypic]
           Class Pelobiontea Page, 1976 see Order Pelobiontida Page, 1976
             Order Phreatamoebida Cavalier-Smith, 1991 [monotypic]
               Genus Phreatamoeba Chávez et al., 1986 see Genus Mastigamoeba Schulze, 1875