Biota see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Eukarya Chatton, 1925 see Domain Eukaryota Chatton, 1925
     "Bikonta"
       Supergroup Chromalveolata Adl et al., 2005 - chromalveolates see Kingdom Chromista Caval.-Sm. (1981)
         Stramenopila see [unranked] Stramenopiles Patterson, 1990
           Phylum Heterokontophyta Moestrup (1992) - heterokonts see Phylum Ochrophyta Caval.-Sm. (1995)
             1 Class Eustigmatophyceae Hibberd & Leedale (1971)
             2.1.1 Class Synurophyceae Andersen (1987) see Class Chrysophyceae Fritsch (1927)
             2.1.2 Class Chrysophyceae Fritsch (1927)
             2.2.1.1 Class Raphidophyceae Chadef. ex P.C.Silva (1980) - raphidophytes
             2.2.1.2.1 Class Tribophyceae Hibberd (1982) see Class Xanthophyceae P. Allorge ex Fritsch (1935)
             2.2.1.2.2 Class Phaeothamniophyceae R.A. Andersen & J.C. Bailey (1998)
             2.2.1.2.3 Class Phaeophyceae Hansgirg (1886) - brown algae
             2.2.2.1 Class Pinguiophyceae Kawachi, Inouye, Honda, O'Kelly, Bailey, Bidigare & Andersen (2002)
             2.2.2.2.1 Class Dictyochophyceae Silva (1980)
             2.2.2.2.2.1 Class Pelagophyceae R.A. Andersen & G.W.Saunders (1993) see Class Dictyochophyceae Silva (1980)
             2.2.2.2.2.2.1 Class Bacillariophyceae Haeckel (1878) - pennates
             2.2.2.2.2.2.2 Class Bolidophyceae Guillou & Chret.-Dinet (1999)