Fig. 7 in Dimorphism in tetragonitid ammonoid Tetragonites minimus from the Upper Cretaceous in Hokkaido, Northern Japan

Fig. 7. Scatter diagrams of four parameters versus shell diameter (D) of tetragonitid ammonoid Tetragonites minimus Shigeta, 1989, from the Santonian, Yezo Group in Hokkaido, Japan. A. H1/D (whorl height ratio). B. H2/D (ventral whorl height ratio). C. U/D (umbilical width ratio). D. B/D (whorl breadth ratio). Abbreviations: H1, whorl height; H2, ventral whorl height; U, umbilical width; B, whorl breadth.