Class: Rotaliata    Subclass: Rotaliana    Order: Nummulitida    Family: Nummulitidae
Operculina d'Orbigny, 1826

Operculina complanata
Defrance, 1824
identified by scientist   
Quaternary
Banda, Timor and Arafura Sea

Operculina gaimardi
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.

Operculina sp.

identified by scientist   
Quaternary