3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Lytoceras crassum | |
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| Author | Jimbo, 1894 | |
| Reference | Palaeont. Abh., N. F., Vol. 2, No. 3, p. 181, pl. 6, fig. 5, 5a | |
| Type specimen | Holotype: UMUT MM7515 (= GT. I - 115) | |
| Type locality | A nodule in the river gravel of the Pombets River, a tributary of the Ikushumbets River, Mikasa City, Sorachi Province, central Hokkaido | |
| Formation name | Upper Yezo Group | |
| Age | Senonian, Upper Cretaceous | |
| Remarks | (= Tetragonites crassus (Jimbo, 1894)) / Remarks: The generic position of this species was transferred to Tetragonites by Matsumoto (1942, p. 672), who suggested this species as a variety of Epigoniceras glabrum (Jimbo, 1894). / Reference: Matsumoto, T., 1942. Proc. Imp. Acad. Tokyo, Vol. 18, 666 - 670. [see printed matter] | |