eukaryotes see Domain Eukaryota Chatton, 1925
   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
         1 Class Trepomonadea Cavalier-Smith, 1993
         2 Class Retortamonadea Grassé, 1952