†subfamily Hexagonariinae Bulvanker 1958 (horn coral)
Anthozoa - Stauriida - Disphyllidae
Parent taxon: Disphyllidae according to D. Hill 1981
Sister taxa: Cantabriastraea, Diffusolasma, Disphyllinae, Paradisphyllinae, Spongonariinae
Subtaxa: Haplothecia, Hexagonaria, Marisastrum
Ecology: stationary epifaunal suspension feeder