Dactylioceras ( Dactylioceras ) helianthoides Yokoyama
| 1975. | Dactylioceras (Dactylioceras) helianthoides Yokoyama Lectotype Hirano, H. 1975b pl. J-12, fig. 3 |
| 1971. | Dactylioceras (Dactylioceras) helianthoides Yokoyama Lectotype Hirano, H. 1971 p. 104, pl. 14, fig. 9 |
| 1904. | Dactylioceras helianthoides Yokoyama Lectotype Yokoyama, M. 1904b p. 16, pl. 4, fig. 6 |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: |
| Geologic Time: | Mesozoic: |
| Hirano, H., 1971: Biostratigraphic study of the Jurassic Toyora group. Part 1. Memoirs of the Faculty of Science, Kyushu University, Series D, vol. 21, no. 1, pp. 93–128, pls. 14–20. (Reference No. 0047) |
| Hirano, H., 1975b: Ammonoid fossils of Japan, 5 (Jurassic ammonites, 11 — Toyora group, 5). Atlas of Japanese fossils, no. 48-305, 4 pp., pl. J-12. Tsukiji Shokan Publishing Co., Ltd., Tokyo. (in Japanese) (Reference No. 0525) |
| 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., 1988, no. 15, p. 23. |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 42. |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 301. |
