Class Phaeophyceae (brown algae)
Parent taxon: Heterokontophyta according to E. Taylor et al. 2008
Sister taxa: Archaeomonas, Bacillariophyceae, Dictyochophyceae, Macrora, Periptera, Triceratiaceae, Stephanogonia, Biddulphiaceae, Cosmiodiscus, Bruniopsis, Discoideae, Cymatogonia, Mediaria, Bacillariophytina, Dossetia, Clavicula, Pleurosigma, Xanthophyceae
Subtaxa: Chordites Ectocarpales Fucales Fucus Laminariales Limnophycus Staurofucus