3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
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| Author | Yabe, 1904 | |
| Reference | Jour. Coll. Sci., Imp. Univ. Tokyo, Vol. 20, No. 2, p. 20, pl. 4, figs. 4 - 7; pl. 6, fig. 6 | |
| Type specimen | Holotype: UMUT MM7560 (= GT. I - 253) | |
| Type locality | Opiraushibets (= Obirashibe River), Tappu area, Obira Town, Rumoi Province, northwestern Hokkaido | |
| Formation name | Upper Ammonite - beds (= Middle Yezo Group) | |
| Age | Possibly Middle Turonian, Upper Cretaceous | |
| Remarks | ||