3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Gaudryceras izumiense | |
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| Author | Matsumoto and Morozumi, 1980 | |
| Reference | Bull. Osaka Mus. Nat. Hist., No. 33, p. 12, pl. 11, fig. 1; pl. 12, fig. 1; pl. 13, fig. 1 | |
| Type specimen | Holotype : OMNH. M1125 (pl. 11, fig. 1) / Paratypes: MT54 (pl. 12, fig. 1), MT 82 (pl. 13, fig. 1)(M. Tani's private collection) | |
| Type locality | Loc. 7, Sobura, Kaizuka City, Osaka Prefecture, west Honshu (ca. 135^25'E, 34^22'N) | |
| Formation name | Horizon B5, Azenotani Formation, Izumi Group | |
| Age | Maastrichtian, Upper Cretaceous | |
| Remarks | ||