3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Karsteniceras obatai | |
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| Author | Matsukawa, 1987 | |
| Reference | Trans. Proc. Palaeont. Soc. Japan, N. S., No. 148, p. 349, fig. 3 - 3 | |
| Type specimen | Holotype: NSM. PM9589 | |
| Type locality | Loc. 7309, Isejigaura, Choshi City, Chiba Prefecture, central Honshu (140^52'15" E, 35^43'26" N) | |
| Formation name | Kimigahama Formation, Choshi Group | |
| Age | Lower Barremian, Lower Cretaceous | |
| Remarks | ||