organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Kingdom Protoctista Hogg, 1860 Phylum Phaeophyta Kjellman (1891) see Phylum Phaeophycota Genus Pelagophycus J.E. Areschoug (1881)