Isognomon rikuzenicus (Yokoyama)
| 1957. | Isognomon rikuzenicus (Yokoyama) Hayami, I. 1957b p. 99, pl. 7, fig. 5a, b |
| 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. |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 16. |
