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 Metamonada Grassé, 1952
           Subphylum Eopharyngia Cavalier-Smith, 1993 see Superclass Eopharyngia (Cavalier-Smith, 1993) Cavalier-Smith, 2003
             Class Retortamonadea Grassé, 1952 [monotypic]
               Order Retortamonadida Grassé, 1952 - retortamonads