3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Heteroceras (?) otsukai | |
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| Author | Yabe, 1904 | |
| Reference | Jour. Coll. Sci., Imp. Univ., Tokyo, Vol. 20, No. 2, p. 16, pl. 4, fig. 1 | |
| Type specimen | Holotype: UMUT MM7555 (= GT. I - 243) | |
| Type locality | Kikumezawa Creek, a tributary of the Ikushunbets River, Province of Ishikari (now Sorachi), central Hokkaido (ca. 142^01'E, 43^13'N) | |
| Formation name | Pachydiscus - beds (=Upper Yezo Group) | |
| Age | Senonian (Santonian), Upper Cretaceous | |
| Remarks | (= Bostrychoceras otsukai (Yabe, 1904)) / Remarks: The generic position of this species was transferred to Bostrychoceras by Matsumoto (1967, p. 338). / Reference: Matsumoto, T., 1967. Mem. Fac. Sci., Kyushu Univ., Ser. D, Vol. 18, No. 2, 331 - 347, pls. 18 - 19. | |