3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Mantelliceras (?) nagaoi | |
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| Author | Matsumoto, Saito and Fukada, 1957 | |
| Reference | Mem. Fac. Sci., Kyushu Univ., Ser. D (Geol.), Vol. 6, No. 1, p. 6, pl. 12, fig. 1; pl. 13, fig. 2 | |
| Type specimen | Holotype: GH. No. 12007 | |
| Type locality | Abeshinai, Nakagawa Town, Teshio Province, northern Hokkaido | |
| Formation name | Middle Yezo Group | |
| Age | Upper Cretaceous | |
| Remarks | ||