Isognomon rikuzenicus (Yokoyama)
| 1964. | Isognomon rikuzenicus (Yokoyama) Paratype Shikama, T. 1964 p. 120, pl. 37, fig. 19 |
| 1957. | Isognomon rikuzenicus (Yokoyama) Hayami, I. 1957b p. 99, pl. 7, fig. 7 |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Isognomonidae: |
| Geologic Time: | Mesozoic: |
| Hayami, I., 1957b: Liassic Gervillia and Isognomon in Japan. Studies on the Liassic pelecypods in Japan, 2. Japanese Journal of Geology and Geography, vol. 28, nos. 1–3, pp. 95–106, pls. 6–7. (Reference No. 0016) |
 PDF in prep. |
| Shikama, T., 1964a: Index fossils of Japan., pp. 1–287, pls. 1–80. Asakura Shoten, Tokyo. (in Japanese) (Reference No. 0618) |
| Ichikawa, T., 1988, no. 15, p. 157. |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 16. |
