Ancilla angusta suavis Yokoyama
| 1958. | Ancilla angusta suavis Yokoyama Holotype Makiyama, J. 1958 pl. 50, fig. 17 |
| 1926. | Ancilla suavis Yokoyama, 1926 Holotype Yokoyama, M. 1926g p. 334, pl. 38, fig. 17 |
| Condition: | Missing |
| Taxonomy: | Mollusca: Gastropoda: Olividae: |
| Geologic Time: | Cenozoic: |
| Horizon: | Hijikata formation: |
| Makiyama, J., 1958: Matajiro Yokoyama's Tertiary fossils from various localities in Japan. Part 2. Palaeontological Society of Japan, Special Papers, no. 4, pp. 1–6, pls. 25–57. (Reference No. 0368) |
| Yokoyama, M., 1926g: Tertiary Mollusca from southern Totomi. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 1, pt. 9, pp. 313–364, pls. 38–41. (Reference No. 0484) |
 |
| Ichikawa, T., 1983, no. 9, p. 55. |
| Ichikawa, T., 1983, no. 9, p. 333. |
