| 1958. | Alvania (Actonia) sadoensis Yokoyama Syntype Makiyama, J. 1958 pl. 45, fig. 12 |
| 1926. | Rissoa (Apicularia) sadoensis Yokoyama, 1926 Syntype Yokoyama, M. 1926f p. 272, pl. 33, fig. 12 |
| Condition: | Present |
| Taxonomy: | Mollusca: Gastropoda: Rissoidae: |
| Geologic Time: | Cenozoic: Pliocene: |
| Horizon: | Sawane 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., 1926f: Fossil shells from Sado. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 1, pt. 8, pp. 249–312, pls. 32–37. (Reference No. 0483) |
 |
| Ichikawa, T., 1983, no. 9, p. 52. |
| Ichikawa, T., 1983, no. 9, p. 326. |
