Genus OSTREA
Kingdom / Phylum . . . . . . . . . Class / Subclass / Infraclass Division / Superorder / Order Suborder / Infraorder . . . . . . Superfamily / Family . . . . . . . Subfamily / Genus . . . . . . . . .	Animalia / Mollusca Bivalvia / Pteriomorphia / n.a. Pteriomorphia / n.a. / Pterioida Ostreina / n.a. Ostreioidea / Ostreidae n.a. / Ostrea
Age: Distribution:	Permian - Recent Global
Depicted on: Ethiopia, 1977 (50 c., fossil, as Ostrea [Gryphea]) Korea (North), 1995 (50 c., fossil, twice in sheet, also in stamp booklet)