I.  Hayami, ?Lower Cretaceous marine pelecypods of Japan. Part 1?, Memoirs of the Faculty of Science, Kyushu University. Series D. Geology, vol. 15, pp. 221-349, 1965.

I.  Hayami, ?Lower Cretaceous marine pelecypods of Japan. Part 1?, Memoirs of the Faculty of Science, Kyushu University. Series D. Geology, vol. 15, pp. 221-349, 1965.