Ostrea gravitesta Yokoyama, 1926
| 1926. | Ostrea gravitesta Yokoyama, 1926 Syntype |
| Condition: | Missing |
| Taxonomy: | Mollusca: Bivalvia: Ostreidae: |
| Geologic Time: | Cenozoic: |
| Yokoyama, M., 1926j: Fossil Mollusca from the oil-fields of Akita. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 1, pt. 9, pp. 377–389, pls. 44–45. (Reference No. 0487) |
 |
| Ichikawa, T., 1983, no. 9, p. 342. |
