![]() Operculina gaimardi D'Orbigny in Deshayes, 1832 identified by scientist Quaternary Micronesia + Philippine Basin | ![]() Operculina philippinensis Cushman, 1921 identified by M. Hesemann Quaternary off Indonesia and Malaysia | ![]() Operculina subgranulosa (d'Orbigny, 1850) identified by M. Hesemann Quaternary Andaman Sea and Malacca St. | ||