Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Bacillariobiota Doweld (2001) Subkingdom Bacillariobiotina Doweld (2001) Phylum Fucophyta Pax (1904) see Phylum Phaeophyta Kjellman (1891) Class Dictyotophyceae Engl. (1892) 1 Subclass Ectocarpophycidae Doweld (2001) 2 Subclass Dictyotophycidae Pax (1894) 3 Subclass Laminariophycidae Doweld (2001)