†class Chrysophyceae (heterokonts)
PaleoDB taxon number: 69590
Parent taxon: Heterokontophyta according to W. Kiessling 2004
Sister taxa: Dictyochophyceae, Phaeophyceae, Xanthophyceae
Subtaxa: Bullasphaera, Clathropyxidella, Litharchaeocystis, Nothyocha, Phytomastigophora, Pseudorocella
Ecology: passively mobile planktonic "photoautotroph"