Invalid names: Liostrea cucurbita Zakharov 1966 [synonym], Liostrea gibberosa Zakharov 1974 [synonym], Liostrea moreana Pugaczewska 1971 [synonym], Liostrea oxfordiana Pugaczewska 1971 [synonym], Liostrea planoconvexa Zakharov 1974 [synonym], Liostrea quadrangularis Pugaczewska 1971 [synonym], Liostrea unciformis Pugaczewska 1971 [synonym], Liostrea uralensis Zakharov 1972 [synonym], Ostrea (Liostrea) delta Arkell 1932 [synonym], Ostrea deltoidea Sowerby 1818 [synonym], Ostrea expansa Sowerby 1821 [synonym], Ostrea hemideltoidea Gerasimov 1955 [synonym], Ostrea unciformis Buvignier 1852 [synonym]