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
     Kingdom Chromista Caval.-Sm. (1981) - chromists
       Subkingdom Chromobiota Caval.-Sm. (1991)
         Infrakingdom Heterokonta Caval.-Sm. (1986) - heterokonts see Superphylum Heterokonta Caval.-Sm. (1986)
           Superphylum Sagenista Caval.-Sm. (1995) [monotypic] see Subphylum Sagenista Cavalier-Smith, 1995
             Phylum Sagenista Caval.-Sm. (1995) see Subphylum Sagenista Cavalier-Smith, 1995
               Subphylum Bicoecia Caval.-Sm. (1989) see Phylum Bigyra Cavalier-Smith, 1998
                 Class Bicoecea Caval.-Sm. (1986) see Class Bicosoecophyceae Loeblich III & Loeblich (1979), nom. nud.
                   Order Pirsoniales Caval.-Sm. (1998) [monotypic]
                     1 Family Pirsoniaceae Caval.-Sm. (1998)