Geisonocerella nakazatoensis Niko
| 1989. | Geisonocerella nakazatoensis Niko Paratype |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: |
| Geologic Time: | Paleozoic: |
| Niko, S., 1989c: A new Devonian cephalopod from the Nakazato formation of the southern Kitakami mountains. Transactions and Proceedings of the Palaeontological Society of Japan. New Series, no. 156, pp. 291–295. (Reference No. 0669) |
 |
| Ichikawa, T., 1995, no. 33, p. 38. |
