Guyniidae

Guyniidae is a family of corals belonging to the order Scleractinia (hard corals).

Genera:
 * Bistylia Tenison-Woods, 1878
 * Cyathosmilia Tenison-Woods, 1878
 * Guynia Duncan, 1873
 * Onchotrochus Duncan, 1869
 * Pourtalocyathus Cairns, 1979