Rock oysters are true oysters of the genus Saccostrea, belonging to the subfamily Saccostreinae of the family Ostreidae . The best-known species is the Sydney rock oyster (Saccostrea glomerata). Species The World Register of Marine Species lists these species: Saccostrea circumsuta (Gould, 1850) Saccostrea cucullata (Born, 1778) – hooded oyster Saccostrea echinata (Quoy & Gaimard, 1835) – tropical black-lip rock oyster Saccostrea glomerata (Gould, 1850) - Sydney rock oyster Saccostrea kegaki Torigoe & Inaba, 1981 Saccostrea malabonensis (Faustino, 1932) – Philippine hooded oyster (talabang kukong kabayo) Saccostrea mordoides Z.-M. Cui, L.-S. Hu, C. Li, Z. Zhang, X.-M. Guo & H.-Y. Wang, 2021 Saccostrea palmula (Carpenter, 1857) † Saccostrea saccellus (Dujardin, 1837) Saccostrea scyphophilla (Peron & Lesueur, 1807) Saccostrea spathulata (Lamarck, 1819) Saccostrea subtrigona (G.B. Sowerby II, 1871) † Saccostrea virleti (Deshayes, 1835) Synonyms Saccostrea commercialis (Iredale & Roughley, 1933): synonym of Saccostrea glomerata (Gould, 1850) Saccostrea cucullata [sic]: synonym of Saccostrea cuccullata (Born, 1778) (misspelling) Saccostrea forskahlii (Gmelin, 1791): synonym of Saccostrea cuccullata (Born, 1778) Saccostrea margaritacea (Lamarck, 1819): synonym of Striostrea margaritacea (Lamarck, 1819) Saccostrea mordax (Gould, 1850): synonym of Saccostrea scyphophilla (Peron & Lesueur, 1807) Saccostrea tubulifera (Dall, 1914): synonym of Saccostrea palmula (Carpenter, 1857) References Dollfus, G.F. & Dautzenberg, P. (1920). Conchyliologie du Miocène moyen du Bassin de la Loire. 1re Partie: Pélécypodes (suite et fin). Mémoires de la Société Géologique de France, Paléontologie. 22(2-4): 379-500, pls 34-51. Coan, E. V.; Valentich-Scott, P. (2012). Bivalve seashells of tropical West America. Marine bivalve mollusks from Baja California to northern Peru. 2 vols, 1258 pp. External links Harry, H.W. (1985). Synopsis of the supraspecific classification of living oysters (Bivalvia: Gryphaeidae and Ostreidae. The Veliger. 28(2): 121-158. Salvi D. & Mariottini P. (2017 [nomenclatural availability: 2016). Molecular taxonomy in 2D: a novel ITS2 rRNA sequence-structure approach guides the description of the oysters' subfamily Saccostreinae and the genus Magallana (Bivalvia: Ostreidae). Zoological Journal of the Linnean Society. 179(2): 263-276.]