eukaryotes see Domain Eukaryota Chatton, 1925
   Kingdom Protozoa Goldfuss, 1818 - protozoa
     Subkingdom Dictyozoa Cavalier-Smith, 1991
       Branch Bikonta Cavalier-Smith, 1993
         Infrakingdom Neozoa Cavalier-Smith, 1993
           Parvkingdom Ciliomyxa Cavalier-Smith, 1993
             Phylum Opalozoa Cavalier-Smith, 1992 see Subphylum Opalozoa Cavalier-Smith, 1992
               1 Subphylum Proterozoa Cavalier-Smith, 1991
               2 Subphylum Opalinata Wenyon, 1926 see Superclass Opalinata Wenyon, 1926
               3 Subphylum Kinetomonada Cavalier-Smith, 1993
               4 Subphylum Hemimastigophora Foissner, Blatterer & Foissner, 1988 see Phylum Hemimastigophora Foissner, Blatterer & Foissner, 1988