3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Yokoyamaoceras jimboi | |
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| Author | Matsumoto, 1955 | |
| Reference | Jap. Jour. Geol. Geogr., Vol. 26, Nos. 1 - 2, p. 153, pl. 9, fig. 4a, b. | |
| Type specimen | Holotype: UMUT MM7625a (= GT. I - 349a) | |
| Type locality | Saushi - sanushibe, Iburi Province, southern central Hokkaido | |
| Formation name | Upper Yezo Group | |
| Age | Senonian, Upper Cretaceous | |
| Remarks | ||