Ancilla okawai Yokoyama
| 1928. | Ancilla okawai Yokoyama |
| Condition: | Present |
| Taxonomy: | Mollusca: Gastropoda: Olividae: |
| Geologic Time: | Cenozoic: |
| Yokoyama, M., 1928a: Pliocene shells from Hyuga. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 2, pt. 7, pp. 331–350, pls. 66–67. (Reference No. 0494) |
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| Ichikawa, T., 1983, no. 9, p. 371. |
