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 Metakaryota see Domain Eukaryota Chatton, 1925
       Kingdom Chromista Caval.-Sm. (1981) - chromists
         Subkingdom Euchromista Cavalier-Sm. (1993) see [unranked] Stramenopila
           Infrakingdom Chromobiota Caval.-Sm. (1986)
             Phylum Heterokonta Caval.-Sm. (1986) see Superphylum Heterokonta Caval.-Sm. (1986)
               Subphylum Bicoecia Caval.-Sm. (1989) see Phylum Bigyra Cavalier-Smith, 1998
                 1 Class Bicoecea Caval.-Sm. (1986) see Class Bicosoecophyceae Loeblich III & Loeblich (1979), nom. nud.