†Hexagonaria (Pinyonastraea) Merriam 1974 (horn coral)
Anthozoa - Stauriida - Disphyllidae
Full reference: C. W. Merriam. 1974. Lower and Lower Middle Devonian rugose corals of the central Great Basin. United States Geological Survey Professional Paper 805:1-83
Parent taxon: Hexagonaria according to C. W. Merriam 1974
Sister taxa: Hexagonaria davidsoni, Hexagonaria hexagona, Hexagonaria reedi
Subtaxa: Hexagonaria (Pinyonastraea) kirki
Type: Prismatophyllum kirki
Ecology: stationary epifaunal suspension feeder
Distribution: found only at Bartine Member 1996-28 (Devonian of Nevada)