eukaryotes see Domain Eukaryota Chatton, 1925
Status: extant
   Kingdom Chromista Caval.-Sm. (1981) - chromists
  Status: extant
     Subkingdom Heterokonta Caval.-Sm. (1986)
    Status: extant
       Phylum Sagenista Caval.-Sm. (1995) see Subphylum Sagenista Cavalier-Smith, 1995
      Status: extant
         Class Bicoecea Caval.-Sm. (1986) see Class Bicosoecophyceae Loeblich III & Loeblich (1979), nom. nud.
        Status: extant
           Order Bicoecales Grassé & Deflandre (1952) see Order Bicosoecales Grassé (1926)
          Status: extant