Megasurcula yokoyamai (Otuka)
| 1957. | Megasurcula yokoyamai (Otuka) Makiyama, J. 1957 pl. 16, fig. 9 |
| 1925. | Pleurotoma sp. Yokoyama, M. 1925a p. 8, pl. 1, fig. 9 |
| Condition: | Missing |
| Taxonomy: | Mollusca: Gastropoda: Turridae: |
| Geologic Time: | Cenozoic: |
| Makiyama, J., 1957: Matajiro Yokoyama's Tertiary fossils from various localities in Japan. Part 1. Palaeontological Society of Japan, Special Papers, no. 3, pp. 1–4, pls. 1–24. (Reference No. 0367) |
| Yokoyama, M., 1925a: Molluscan remains from the uppermost part of the Jo-ban coal-field. Journal of the College of Science, Imperial University of Tokyo, vol. 45, art. 5, pp. 1–34, pls. 1–6. (Reference No. 0473) |
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| Ichikawa, T., 1983, no. 9, p. 42. |
| Ichikawa, T., 1983, no. 9, p. 304. |
