Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Bacillariobiota Doweld (2001) Subkingdom Bacillariobiotina Doweld (2001) Phylum Fucophyta Pax (1904) see Phylum Phaeophyta Kjellman (1891) Class Fucophyceae Warming (1884) see Class Phaeophyceae Hansgirg (1886)