†family Pachythecalidae Cuif 1975 (stony coral)
Parent taxon: Pachythecaliina according to D. Turnsek 1997
Sister taxa: Amphiastraeidae, Atelophyllia, Axosmiliidae, Gablonzeriidae, Pachycoeniidae, Volzeiidae, Volzeioidea, Zardinophyllidae
Subtaxa: Cassianastraea, Pachydendron, Radiophyllia, Simplexastraea
Ecology: stationary intermediate-level epifaunal microcarnivore-photosymbiotic