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)
         Class Phaeophycea Kjellman (1891) see Class Phaeophyceae Hansgirg (1886)
           Subclass Phaeophycidae Scagel ex Caval.-Sm. (1986)