Harpoceras ( Harpoceras ) chrysanthemum (Yokoyama)
| 1973. | Harpoceras (Harpoceras) chrysanthemum (Yokoyama) Hirano, H. 1973a p. 1, pl. 2, fig. 1 |
| 1964. | Hildoceras densicostatum Yokoyama Paralectotype Shikama, T. 1964 p. 154, pl. 54, fig. 1 |
| 1952. | Hildoceras densicostatum Yokoyama Paralectotype Shikama, T. 1952 p. 116, pl. 20, fig. 4 |
| 1943. | Hildoceras densicostatum Yokoyama Paralectotype Shikama, T. 1943 p. 183, pl. 20, fig. 4 |
| 1904. | Hildoceras densicostatum Yokoyama Paralectotype Yokoyama, M. 1904b p. 12, pl. 3, 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) |
 |
| Shikama, T., 1943: A handbook of illustrated fossils from Japanese and their adjacent territories., pp. 1–282, pls. 1–46. Nippon Koubutu Syumi-no-kai, Kyoto. (in Japanese) (Reference No. 0616) |
| Shikama, T., 1952: A handbook of illustrated fossils from Japanese and their adjacent territories., pp. 1–376, pls. 1–57. Nippon Koubutu Syumi-no-kai, Kyoto. (in Japanese) (Reference No. 0617) |
| Shikama, T., 1964a: Index fossils of Japan., pp. 1–287, pls. 1–80. Asakura Shoten, Tokyo. (in Japanese) (Reference No. 0618) |
| 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) |
 |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 42. |
| Ichikawa, T., 1988, no. 15, p. 166. |
| Ichikawa, T., 1988, no. 15, p. 152. |
| Ichikawa, T., 1988, no. 15, p. 142. |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 300. |
