 Isastraea was named by Milne-Edwards and Haime 1851.It was misspelled as Isstraea by Sepkoski 2002; it was corrected as Isastrea by Prinz 1991, Lauxmann 1991 and Baron-Szabo 2006.It was assigned to Montlivaltiidae by Beauvais 1986 and Prinz 1991; to Isastraeidae by Roniewicz 1976 and Lauxmann 1991; to Scleractinia by Sepkoski 2002; and to Isastreidae by Baron-Szabo 2006.Isastraea arachnoidea, I. alimena, I. angulosa, I. bernardi, I. bernardiana, I. bernensis, I. browni, I. cesarensis, I. collignoni, I. crassa, I. crassisepta, I. decorata, I. deligata, I. elegans, I. excentrica, I. explanata, I. explanulata, I. fallax, I. favosiformis, I. fromenteli, I. goldfussi, I. greppini, I. gresslyi, I. helianthoides, I. hemisphaerica, I. hourcqi, I. incerta, I. kosodeensis, I. limitata, I. marcoui, I. matumotoi, I. nantuacumensis, I. neocomiensis, I. parvistella, I. propinqua, I. qingyanensis, I. rariseptata, I. richardsoni, I. robusta, I. salinensis, I. sinemuriensis, I. splendida, I. sugiyamai, I. superficialis, I. taruensis, I. tenuisepta, I. tenuistriata, I. whitneyi, I. yuraensis, Parisastraea collignoniPlacastrea was named by Stoliczka 1873.It was synonymized subjectively with Isastrea by Baron-Szabo 2009.It was assigned to Montlivaltiidae by Löser et al. 2009.Parisastraea was named by Alloiteau 1958 Sepkoskis age data: J m Sepkoskis reference number: 658. It is not extant.It was synonymized subjectively with Isastrea by Kiessling 2014.It was assigned to Isastreidae by Alloiteau 1958; and to Scleractinia by Sepkoski 2002.1851 Isastraea Milne-Edwards and Haime1873 Placastrea Stoliczka1958 Parisastraea Alloiteau1976 Isastraea Roniewicz1986 Isastraea Beauvais1991 Isastrea Lauxmann1991 Isastrea Prinz2002 Isstraea Sepkoski, Jr.2002 Parisastraea Sepkoski, Jr.2006 Isastrea Baron-Szabo p. 452009 Placastrea Löser et al.genus Isastrea Milne-Edwards and Haime 1851 