Arca sp.
| 1925. | Arca sp. |
| Condition: | Missing |
| Taxonomy: | Mollusca: Bivalvia: Arcidae: |
| Geologic Time: | Cenozoic: |
| Yokoyama, M., 1925b: Molluscan remains from the middle part of the Jo-ban coal-field. Journal of the College of Science, Imperial University of Tokyo, vol. 45, art. 7, pp. 1–23, pls. 1–3. (Reference No. 0474) |
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| Ichikawa, T., 1983, no. 9, p. 312. |
