Hydroides defrenatus (Yokoyama)
| 1973. | Hydroides defrenatus (Yokoyama) Paralectotype Oyama, K. 1973 p. 121, pl. 4, fig. 23 |
| 1954. | Hydroides defrenatus (Yokoyama) Paralectotype Taki, I. & Oyama, K. 1954 pl. 43, fig. 19 |
| 1927. | Vermetus defrenatus Yokoyama, 1927 Syntype Yokoyama, M. 1927a p. 413, pl. 46, fig. 19 |
| Condition: | Present |
| Geologic Time: | Cenozoic: |
| Horizon: | Tokyo Formation: |
| Locality: | Tokyo: Kita-ku: Oji: |
| 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., 1927a: Mollusca from the upper Musashino of Tokyo and its Suburbs. Journal of the Faculty of Science, Imperial University of Tokyo, Section 2, vol. 1, pt. 10, pp. 391–437, pls. 46–50. (Reference No. 0488) |
 |
| Ichikawa, T., 1983, no. 9, p. 148. |
| Ichikawa, T., 1983, no. 9, p. 216. |
| Ichikawa, T., 1983, no. 9, p. 345. |
