3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Prionocycloceras obatai | |
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| Author | Futakami, 1991 | |
| Reference | Jour. Kawamura Women's Univ., Vol. 2, p. 261, pl. 2, fig. 3; text - fig. 2A, B | |
| Type specimen | Holotype: NSM. PM9578 | |
| Type locality | Loc. Ki607, the Roku - no - sawa Creek, a tributary of the Kamiichi - no - sawa River, Ikushumbets area, Mikasa City, Sorachi province, central Hokkaido (142^02'29" E, 43^16'29" N) | |
| Formation name | Lower part of the Upper Yezo Group | |
| Age | Lower to middle (?) Coniacian, Upper Cretaceous | |
| Remarks | ||