Dolorthoceras ? sp.
| 1990. | Dolorthoceras ? sp. Niko, S. 1990b p. 557, fig. 2-1 |
| 1989. | Dolorthoceras ? sp. Niko, S. 1989b p. 81, pl. 2, fig. 3 |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: |
| Geologic Time: | Paleozoic: |
| Niko, S., 1989b: Cephalopods. Fossil from the Onimaru Quarry, pp. 79–86, pls. 1–2. Ofunato City Museum, Iwate. (in Japanese) (Reference No. 0668) |
| Niko, S., 1990b: Early Carboniferous (Viséan) cephalopods from the Hikoroichi formation, southern Kitakami mountains. Transactions and Proceedings of the Palaeontological Society of Japan. New Series, no. 159, pp. 554–561. (Reference No. 0671) |
 |
| Ichikawa, T., 1995, no. 33, p. 39. |
| Ichikawa, T., 1995, no. 33, p. 38. |
