3D digital model database TYPE SPECIMENS of Cretaceous ammonoid in Japan
| Scientific name | Anisoceras subquadratum | |
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| Author | Yokoyama, 1890 | |
| Reference | Palaeontographica, Vol. 36, p. 183, pl. 20, fig. 6 | |
| Type specimen | Lectotype: Unnumbered specimen registered in Bayer Staatssammlung fuer Palaeontologie und historische Geologie, Muechen | |
| Type locality | Near Urakawa, Hidaka Province, southern central Hokkaido | |
| Formation name | Upper Yezo Group | |
| Age | Santonian - Campanian, Upper Cretaceous | |
| Remarks | (= Polyptychoceras subquadratum (Yokoyama, 1890)) / Remarks: Lectotype was designated by Matsumoto (1963, p. 30). / Reference: Matsumoto, T., 1963. Palaeont. Soc. Jap., 25th Anniv. Vol., 27 - 32, pls.44 - 51. [see printed matter] | |