†Holocoenia Milne-Edwards and Haime 1851 (stony coral)
Anthozoa - Scleractinia - Actinastreidae
Alternative spelling: Holocsi
Parent taxon: Actinastreidae according to R. Baron-Szabo 2006
Sister taxa: Actinastrea, Agrostyliastraea, Allocoenia, Allocoeniopsis, Araucanastrea, Chondrocoenia, Coenastraea, Columactinastraea, Floriastrea, Stelidioseris, Stephanastrea, Texastrea
Subtaxa: Holocoenia hilli, Holocoenia jaccardi, Holocoenia parvula
Ecology: stationary intermediate-level epifaunal photosymbiotic-suspension feeder