3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan

Scientific name	Hamites obstrictum
Author	Jimbo, 1894
Reference	Palaeont. Abh., N. F., Vol. 2, No. 3, p. 184, pl. 7, fig. 2,2a
Type specimen	Lectotype: UMUT MM7523 (= GT. I - 124)
Type locality	The Obirashibe River, about 48 km from its mouth, Tappu area, Obira Town, Rumoi Province, northwestern Hokkaido
Formation name	Upper Yezo Group
Age	Upper Cretaceous
Remarks	(= Polyptychoceras obstrictum (Jimbo, 1894)) / Remarks: The generic position of this species was transferred to Polyptychoceras by Wright and Matsumoto (1954, p. 117). / Reference: Wright, C. W. and Matsumoto, T., 1954. Mem. Fac. Sci., Kyushu Univ., Ser. D, Vol. 4, No. 2, 107 - 134, pls. 7 - 8. [see printed matter]