| 1960. | Opis (Coelopis ?) sp. Tamura, M. 1960d p. 288, pl. 33, figs. 3, 4 |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Astartidae: |
| Geologic Time: | Mesozoic: |
| Tamura, M., 1960d: Heterodont and other pelecypods from the Upper Jurassic Soma group, Japan. Transactions and Proceedings of the Palaeontological Society of Japan. New Series, no. 39, pp. 285–292, pl. 33. (Reference No. 0295) |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 275. |
