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