Arca sp.
| 1932. | Arca sp. |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Arcidae: |
| Geologic Time: | Cenozoic: |
| 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) |
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| Ichikawa, T., 1983, no. 9, p. 392. |
