JAPAN: Pleistocene, see for formation below pictures.

Screen 21: Acteonoidea, Nuculoidea

Ringicula doliaris (3 mm), colno 36558 Semata Formation	Scaphander japonica (15 mm), colno 36571 Semata Formation
Acila divaricata (24 mm), colno 37540 Omma Formation	Acila insignis (18 mm), colno 37536 Omma Formation

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Chitonina	Dentaliida	Patelloidea	Fissurelloidea	Trochoidea	Cirroidea	Cerithioidea	Xenophoroidea
Buccinoidea	Columbelloidea	Conoidea	Mitroidea	Volutoidea	Muricoidea	Naticoidea	Calyptraeoidea
Tonnoidea	Architectonicoidea	Pyramidelloidea	Acteonoidea	Nuculoidea	Nuculanoidea	Arcoidea	Limopsoidea
Mytiloidea	Limopsoidea	Ostreoidea	Pectinoidea	Anomioidea	Lucinoidea	Galeommatoidea	Carditoidea
Cardioidea	Mactroidea	Solenoidea	Tellinoidea	Glossoidea	Corbiculoidea	Veneroidea	Myoidea
Hiatelloidea	Pandoroidea	Cuspidariina