organisms Animalia [Linnaeus, 1758] Eumetazoa [Bütschli, 1910] Bilateria [Hatschek, 1888] Protostomia [Grobben, 1908] Spiralia [Schleip, 1929] Teloblastica [(C. Nielsen, 1995)] Articulata [Cuvier] Mollusca [Linnaeus, 1758] Ostrea [Linnaeus, 1758] Ostrea edulis [Linnaeus, 1758]