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. (1977) Otoscaphites puerculus (Jimbo) Scaphites planus (Yabe), . ( : Tanabe K. 1977. Functional evolution of Otoscaphites puerculus (Jimbo) and Scaphites planus (Yabe), Upper Cretaceous ammonites. Memoirs of the Faculty of Science, Kyushu University (series D, Geology), p.367-407, 18 fig., pl. 62-64.)