3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Ancyloceras choshiense | |
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| Author | Shimizu, 1931 | |
| Reference | Sci. Rep. Tohoku Imp. Univ., 2nd Ser., Vol. 15, No. 1, p. 37, pl. 3, figs. 22 - 24 | |
| Type specimen | Holotype: IGPS 36832 | |
| Type locality | A little north of Inubo Cape, , Choshi Peninsula, Chiba Prefecture, central Honshu | |
| Formation name | Choshi Group | |
| Age | Aptian, Lower Cretaceous | |
| Remarks | ||