Cylichnatys angusta (Gould, 1859)
| 1973. | Cylichnatys angusta (Gould, 1859) Oyama, K. 1973 p. 68, pl. 19, fig. 24a-d |
| 1964. | Decorifer delicatula (A. Adams) Shikama, T. 1964 p. 116, pl. 35, fig. 7 |
| 1954. | Cylichnatys yamakawai (Yokoyama, 1920) Syntype Taki, I. & Oyama, K. 1954 pl. 2, fig. 7a-d |
| 1920. | Cylichna yamakawai Yokoyama, 1920 Syntype Yokoyama, M. 1920 p. 29, pl. 1, fig. 7a-d |
| Condition: | Present |
| Taxonomy: | Mollusca: Gastropoda: Scaphandridae: |
| Geologic Time: | Cenozoic: |
| Locality: | Kanagawa: Yokosuka: |
| 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) |
| Shikama, T., 1964a: Index fossils of Japan., pp. 1–287, pls. 1–80. Asakura Shoten, Tokyo. (in Japanese) (Reference No. 0618) |
| 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. 118. |
| Ichikawa, T., 1988, no. 15, p. 171. |
| Ichikawa, T., 1983, no. 9, p. 186. |
| Ichikawa, T., 1983, no. 9, p. 251. |
