Placopecten wakuyaensis Masuda, 1956
MASUDA, K. 1956. Some Fossil Pectinidae from the Oido Formation, Wakuya-machi, Tôda-gun, Miyagi Prefecture, Northeast Honshu, Japan. Saito Ho-on Kai Museum Research Bulletin, 25: 22-26, pI. 3 [p. 23, pl. 3, figs. 1-4]