| 1960. | Purpura (Thais) pseudodiadema (Yokoyama) Syntype Makiyama, J. 1960 pl. 105, fig. 5 |
| 1928. | Cuma pseudodiadema Yokoyama, 1928 Syntype Yokoyama, M. 1928c p. 122, pl. 19, fig. 5 |
| Condition: | Present |
| Taxonomy: | Mollusca: Gastropoda: Muricidae: |
| Geologic Time: | Cenozoic: |
| Makiyama, J., 1960: Matajiro Yokoyama's Tertiary fossils from various localites in Japan. Part 4. Palaeontological Society of Japan, Special Papers, no. 6, pp. 1–15, pls. 87–119. (Reference No. 0575) |
| Yokoyama, M., 1928c: Semi-fossil shells from Noto. Imperial Geological Survey of Japan, Report, no. 101, pp. 113–128, pls. 19–21. (Reference No. 0639) |
| Ichikawa, T., 1988, no. 15, p. 92. |
| Ichikawa, T., 1988, no. 15, p. 194. |
