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3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Yubariceras (Romaniceras?) japonicum | |
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| Author | Matsumoto, Saito and Fukada, 1957 | |
| Reference | Mem. Fac. Sci., Kyushu Univ., Ser. D. (Geol.), Vol. 6, No. 1, p. 31, pl. 8, fig. 2; text - figs. 11, 12 | |
| Type specimen | Holotype: UMUT. MM7622 (= GT. I - 345) | |
| Type locality | Yubari River, Oyubari area, Sorachi Province, | |
| Formation name | central Middle Yezo Group | |
| Age | Middle to Upper Turonian, Upper Cretaceous | |
| Remarks | ||