Ammonites sp.
| 1904. | Ammonites sp. Yokoyama, M. 1904a p. 7, pl. 2, fig. 11 |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: |
| Geologic Time: | Mesozoic: |
| Yokoyama, M., 1904a: On some Jurassic fossils from Rikuzen. Journal of the College of Science, Imperial University of Tokyo, vol. 18, art. 6, pp. 1–13, pls. 1–2. (Reference No. 0330) |
 |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 300. |
