Pachyseris Milne-Edwards and Haime 1849 (stony coral)
Anthozoa - Scleractinia - Agariciidae
Parent taxon: Agariciidae according to J. W. Wells 1956
Sister taxa: Agaricia, Anisoria, Coeloseris, Craterastraea, Cyathoseris, Gardineroseris, Helioseris, Heterogyra, Hydnophoroseris, Lamellofungia, Leptoseris, Maeandrella, Mioseris, Morphastrea, Ogilviastraea, Pavona, Plocoastraea, Trochoseris, Undaria, Valloria, Vaughanoseris
Subtaxa: Pachyseris (Pavonaraea), Pachyseris compacta, Pachyseris cristata, Pachyseris curvata, Pachyseris denticulata, Pachyseris distans, Pachyseris rugosa, Pachyseris speciosa
Ecology: stationary intermediate-level epifaunal microcarnivore-photosymbiotic