Harpoceras ( Harpoceras ) chrysanthemum (Yokoyama)
| 1973. | Harpoceras (Harpoceras) chrysanthemum (Yokoyama) Paralectotype Hirano, H. 1973a p. 1, pl. 1, fig. 2 |
| 1904. | Hildoceras chrysanthemum Yokoyama Paralectotype Yokoyama, M. 1904b p. 11, pl. 2, fig. 2 |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: |
| Geologic Time: | Mesozoic: |
| Hirano, H., 1973a: Biostratigraphic study of the Jurassic Toyora group. Part 2. Transactions and Proceedings of the Palaeontological Society of Japan. New Series, no. 89, pp. 1–14, pls. 1–4. (Reference No. 0048) |
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| Yokoyama, M., 1904b: Jurassic ammonites from Echizen and Nagato. Journal of the College of Science, Imperial University of Tokyo, vol. 19, art. 20, pp. 1–17, pls. 1–4. (Reference No. 0331) |
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| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 42. |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 300. |
