†Helenia Walcott 1889 (mollusk)
Hyolitha - Hyolithida - Hyolithidae
Parent taxon: Hyolithidae according to D. W. Fisher 1962
Sister taxa: Carinolithes, Hallotheca, Korilithes, Nevadotheca, Novakotheca, Sololites, Yalarrnga
Subtaxa: none
Ecology: facultatively mobile epifaunal suspension feeder