Harpoceras ( Harpoceras ) chrysanthemum (Yokoyama)
| 1973. | Harpoceras (Harpoceras) chrysanthemum (Yokoyama) Paralectotype Hirano, H. 1973a p. 1, pl. 2, fig. 2 |
| 1936. | Pravitoceras sigmoidale Yabe |
| 1904. | Hildoceras chrysanthemum Yokoyama Paralectotype Yokoyama, M. 1904b p. 11, pl. 2, fig. 4 |
| 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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| Sasai, H., 1936: The Izumi sandstone series in Awaji island. Journal of the Geological Society of Japan, vol. 43, no. 515, pp. 590–602, pls. 28–29. (in Japanese) (Reference No. 0612) |
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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., 1988, no. 15, p. 136. |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 300. |
