Pecten tairanus Yokoyama, 1925
YOKOYAMA, M. 1925. Molluscan remains from the middle part of the Jô-ban coal-field. Journal of the College of Science, Imperial University of Tokyo, 45 (7): 1-23. [p. 8, pl. 1, figs. 8-9]
«13. Pecten tairanus, n· sp.
PI. 1. Figs. 8, 9. A small, neat, flat shell circuler in outline, slightly longer than high. The surface is smooth, only coarse concentric corrugations being present. The ears of the left valve, though somewhat unequal in shape, are triangular, while the anterior one of the right valve is long and narrow with a few coarse radiating ribs and a deep byssal notch below. The left valve (fig. 8) which is nearly perfect is 13 millim. long and 11 millim. high.
Fossil occurrence.— Kamenoo-Beds: Kubo-Street in the town of Taira.» MATAJIRO YOKOYAMA, 1925
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M. Yokoyama, 1925, plate 1.
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