3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Trianglites antiqus | |
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| Author | Matsumoto, 1977 | |
| Reference | Mem. Fac. Sci., Kyushu Univ., Ser. D (Geol.), Vol. 23, No. 3, p. 350, pl. 58, fig. 1 | |
| Type specimen | Holotype: NSM. PM7259 | |
| Type locality | Saku - gakko - no - sawa Creek, Saku area, Nakagawa Town, Teshio Province, northwestern Hokkaido (ca. 142^1 - 2' E, 44^44'N) | |
| Formation name | Saku Formation, Middle Yezo Group | |
| Age | Turonian?, Upper Cretaceous | |
| Remarks | ||