Class Phaeophyceae (brown algae)
PaleoDB taxon number: 306705
Parent taxon: Heterokontophyta according to E. Taylor et al. 2008
Sister taxa: Chrysophyceae, Dictyochophyceae, Xanthophyceae
Subtaxa: Chordites, Ectocarpales, Fucales, Fucus, Laminariales, Limnophycus, Staurofucus