†Hillastraea Brownlaw and Jell 1997 (horn coral)
Anthozoa - Stauriida - Disphyllidae
Parent taxon: Disphyllinae according to R. L. S. Brownlaw and J. S. Jell 2008
Sister taxa: Alaiophyllum, Amaraphyllum, Aphraxonia, Argutastrea, Aristophyllum, Ceratophyllum, Chalcidophyllum, Charactophyllum, Chostophyllum, Disphyllum, Dushanophrentis, Eoglossophyllum, Hemiaulacophyllum, Hunanophrentis, Kunthia, Minussiella, Noviphyllum, Pseudocampophyllum, Spinophyllum, Temnophyllum
Subtaxa: Hillastraea floriformis, Hillastraea georgeae
Ecology: stationary epifaunal suspension feeder