3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Gaudryceras hamanakense | |
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| Author | Matsumoto and Yoshida, 1979 | |
| Reference | Trans. Proc. Palaeont. Soc. Japan, N. S., No. 114, p. 68, pl. 10, figs. 1, 2; pl. 11, figs. 1, 2 | |
| Type specimen | Holotype: GK. H5873 (pl. 10, fig. 1) / Paratypes: YU. C7615 (S. Yoshida Collection) (pl. 10, fig. 2; pl. 11, fig. 2), TKD. 30481 (pl. 10, fig. 3), TKD. 30480 (pl. 11, fig. 1) | |
| Type locality | Loc. KU1056A, Ponporoto, Hamanaka Town, Akkeshi County, eastern Hokkaido (145^09'46" E, 43^08'43" N) | |
| Formation name | Lower part of At 2, Akkeshi Formation, Nemuro Group | |
| Age | Upper Maastrichtian, Upper Cretaceous | |
| Remarks | ||