Siphonalia spadicea (Reeve, 1846)
| 1973. | Siphonalia spadicea (Reeve, 1846) Oyama, K. 1973 p. 43, pl. 12, fig. 6a, b |
| 1954. | Siphonalia spadicea (Reeve) Taki, I. & Oyama, K. 1954 pl. 4, fig. 10a, b |
| 1920. | Siphonalia spadicea (Reeve) Yokoyama, M. 1920 p. 53, pl. 3, fig. 10a, b |
| Condition: | Present |
| Taxonomy: | Mollusca: Gastropoda: Buccinidae: |
| Geologic Time: | Cenozoic: Pleistocene: |
| Horizon: | Otsu Formation: |
| Locality: | Kanagawa: Yokosuka: Otsu: |
| Oyama, K., 1973: Revision of Matajiro Yokoyama's type Mollusca from the Tertiary and Quaternary of the Kanto area. Palaeontological Society of Japan, Special Papers, no. 17, pp. 1–148, pls. 1–57. (Reference No. 0411) |
| Taki, I. and Oyama, K., 1954: Matajiro Yokoyama's the Pliocene and later faunas from the Kwanto region in Japan. Palaeontological Society of Japan, Special Papers, no. 2, pp. 1–68, pls. 1–49. (Reference No. 0441) |
| Yokoyama, M., 1920: Fossils from the Miura peninsula and its immediate north. Journal of the College of Science, Imperial University of Tokyo, vol. 39, art. 6, pp. 1–193, pls. 1–20. (Reference No. 0464) |
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| Ichikawa, T., 1983, no. 9, p. 120. |
| Ichikawa, T., 1983, no. 9, p. 188. |
| Ichikawa, T., 1983, no. 9, p. 253. |
