3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Takahashia eureka | |
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| Author | Matsumoto, 1984 | |
| Reference | Proc. Japan Acad., Vol. 60, Ser. B, No. 3, p. 33, fig. 1A, B | |
| Type specimen | Holotype: GK. H5567 | |
| Type locality | Loc. IK 1101, Katsurazawa quarry (now abandoned) on the right side of the main stream of the Ikushumbets River, near the Ohashi bridge, Ikushumbets area, Mikasa City, Sorachi Province, central Hokkaido (141^59'30" E, 43^15'00" N) | |
| Formation name | Unit IIb, Mikasa Formation, Middle Yezo Group | |
| Age | Lower Cenomanian, Upper Yezo Group | |
| Remarks | ||