Phylum Heterokonta Caval.-Sm. (1986) see Superphylum Heterokonta Caval.-Sm. (1986)
   Subphylum Ochrista Caval.-Sm. (1986), orth. inval. see Phylum Ochrista Caval.-Sm. (1995)
     Infraphylum Chrysista Caval.-Sm. (1993)
       Superclass Fucistia Caval.-Sm. (1995)
         1 Class Chrysomerophycea Caval.-Sm. (1995) see Class Chrysomerophyceae Caval.-Sm. (1995)
         2 Class Xanthophycea Fritsch (1935) see Class Xanthophyceae P. Allorge ex Fritsch (1935)
         3 Class Phaeophycea Kjellman (1891) see Class Phaeophyceae Hansgirg (1886)