†family Placocoeniidae Alloiteau 1952 (stony coral)
Parent taxon: Faviina according to R. Baron-Szabo 2006
Sister taxa: Columastreidae, Faviicae, Heliastraeidae, Isastreidae, Misistellidae, Mussidae, Oculinidae, Pamiroseriidae, Phyllocoeniidae, Placosmiliidae, Stylophyllicae, Tropidastraeidae
Subtaxa: Astrogyra, Columnocoenia, Neocoenia, Paraplacocoenia, Placocoenia, Placocoeniopsis, Taxogyra
Ecology: stationary intermediate-level epifaunal photosymbiotic-suspension feeder