Planammatoceras chibai (Yokoyama)
| 1974. | Planammatoceras chibai (Yokoyama) Holotype Takahashi, H. 1974c pl. J-2, fig. 8 |
| 1964. | Hammatoceras chibai (Yokoyama) Holotype Shikama, T. 1964 p. 154, pl. 54, fig. 7 |
| 1954. | Hammatoceras chibai (Yokoyama) Holotype Sato, T. 1954b p. 94, pl. 8, fig. 6 |
| 1952. | Grammoceras chibai Yokoyama Holotype Shikama, T. 1952 p. 116, pl. 20, fig. 9 |
| 1943. | Grammoceras chibai Yokoyama Holotype Shikama, T. 1943 p. 184, pl. 20, fig. 9 |
| 1904. | Ammonites sp. Yokoyama, M. 1904a p. 7, pl. 2, fig. 10 |
| Condition: | Present |
| Taxonomy: | Mollusca: Cephalopoda: |
| Geologic Time: | Mesozoic: |
| Sato, T., 1954b: Hammatoceras de Kitakami, Japon. Japanese Journal of Geology and Geography, vol. 25, nos. 1–2, pp. 81–100, pls. 7–9. (Reference No. 0265) |
| Shikama, T., 1943: A handbook of illustrated fossils from Japanese and their adjacent territories., pp. 1–279, 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) |
| Takahashi, H., 1974c: Ammonoid fossils of Japan, 1 (Jurassic ammonites, 1 — Shizukawa group). Atlas of Japanese fossils, no. 35-205, 4 pp., pl. J-2. Tsukiji Shokan Publishing Co., Ltd., Tokyo. (in Japanese) (Reference No. 0622) |
| Yokoyama, M., 1904a: On some Jurassic fossils from Rikuzen. Journal of the College of Science, Imperial University of Tokyo, vol. 18, art. 6, pp. 1–13, pls. 1–2. (Reference No. 0330) |
 |
| Ichikawa, T., 1988, no. 15, p. 184. |
| Ichikawa, T., 1988, no. 15, p. 166. |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 249. |
| Ichikawa, T., 1988, no. 15, p. 152. |
| Ichikawa, T., 1988, no. 15, p. 142. |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 300. |
