chromalveolates see Supergroup Chromalveolata Adl et al., 2005
   Kingdom Chromista Caval.-Sm. (1981) - chromists
     Subkingdom Chromobiota Caval.-Sm. (1991)
       Infrakingdom Heterokonta Caval.-Sm. (1986) - heterokonts see Superphylum Heterokonta Caval.-Sm. (1986)
         Phylum Sagenista Caval.-Sm. (1995) see Subphylum Sagenista Cavalier-Smith, 1995
           Class Bicoecea Caval.-Sm. (1986) see Class Bicosoecophyceae Loeblich III & Loeblich (1979), nom. nud.
             1 Genus Bicosoeca James-Clark, 1866
             2 Genus Cafeteria Fenchel & Patterson, 1988
             3 Genus Caecitellus Patterson et al., 1993