Macoma optiva Yokoyama
| 1959. | Macoma optiva Yokoyama Makiyama, J. 1959 pl. 63, fig. 1 |
| 1927. | Tellina izurensis Yokoyama Yokoyama, M. 1927e p. 200, pl. 52, fig. 1 |
| Condition: | Missing |
| Taxonomy: | Mollusca: Bivalvia: Tellinidae: |
| Geologic Time: | Cenozoic: |
| Makiyama, J., 1959: Matajiro Yokoyama's Tertiary fossils from various localities in Japan. Part 3. Palaeontological Society of Japan, Special Papers, no. 5, pp. 1–4, pls. 58–86. (Reference No. 0369) |
| Yokoyama, M., 1927e: Tertiary shells from the coal-field of Haboro, Teshio. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 2, pt. 4, pp. 191–204, pls. 51–52. (Reference No. 0492) |
 |
| Ichikawa, T., 1983, no. 9, p. 63. |
| Ichikawa, T., 1983, no. 9, p. 368. |
