3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Desmoceras ishikawai | |
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| Author | Jimbo, 1894 | |
| Reference | Palaeont. Abhandl., N. F., Vol. 2, No. 3, p. 174, pl. 1, fig. 5, 5a | |
| Type specimen | Lectotype: UMUT MM7507 (= GT. I - 95a) | |
| Type locality | The Obirashibetsu River, about 52 km from its mouth, Tappu area, Obira Town, Rumoi Province, northwestern Hokkaido | |
| Formation name | Upper Yezo Group | |
| Age | Santonian, Upper Cretaceous | |
| Remarks | (= Yokoyamaoceras ishikawai (Jimbo, 1894), macroconch) / Remarks: Lectotype was designated by Matsumoto (1954, p. 94). The generic position of this species was transferred to Yokoyamaoceras by Maeda (1993, p. 122). / References: Matsumoto, T., 1954. In T. Matsumoto (ed.): The Cretaceous System in the Japanese Islands, 243 - 324, pls.1 - 20, Japan Society for Promotion of Science, Tokyo. Maeda, H., 1993. Trans. Proc. Palaeont. Soc. Jap., N. S., No. 169, 97 - 128. [see printed matter] | |