Cyrena sp.
| 1932. | Cyrena sp. |
| 1927. | Nucula sp. |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Corbiculidae: |
| Geologic Time: | Cenozoic: |
| 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) |
 |
| Yokoyama, M., 1932a: Tertiary Mollusca from the coalfield of Uryu, Ishikari. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 3, pt. 6, pp. 221–247, pls. 1–4. (Reference No. 0503) |
| |
| Ichikawa, T., 1983, no. 9, p. 392. |
| Ichikawa, T., 1983, no. 9, p. 369. |
