Kingdom Protoctista Hogg, 1860
   Subkingdom Phycobionta
     01 Division Xanthophyta
     02 Division Chrysophyta see Phylum Chrysophyta Pascher (1914)
     03 Division Dinophyta see Phylum Dinophyta auct.
     04 Division Bacillariophyta Engl. & Gilg (1919) see Phylum Bacillariophyta Engl. & Gilg (1919)
     05 Division Cryptophyta see Phylum Cryptophyta Caval.-Sm. (1986)
     06 Division Haptophyta Hibberd
     07 Division Euglenophyta see Phylum Euglenophyta Pascher (1931)
     08 Division Chlorophyta Reichenbach (1834) - green algae sensu stricto see Phylum Chlorophyta Pascher (1914)
     09 Division Phaeophyta see Phylum Phaeophyta Kjellman (1891)
     10 Division Rhodophyta Wettst. (1901) see Phylum Rhodophyta Wettst. (1901)