Undaria Oken 1815 (stony coral)
Anthozoa - Scleractinia - Agariciidae
Parent taxon: Agariciidae according to A. F. Budd and D. F. McNeill 1998
Sister taxa: Agaricia, Anisoria, Coeloseris, Craterastraea, Cyathoseris, Gardineroseris, Helioseris, Heterogyra, Hydnophoroseris, Lamellofungia, Leptoseris, Maeandrella, Mioseris, Morphastrea, Ogilviastraea, Pachyseris, Pavona, Plocoastraea, Trochoseris, Valloria, Vaughanoseris
Subtaxa: none
Ecology: stationary intermediate-level epifaunal microcarnivore-photosymbiotic