Fig. 5 in Dimorphism in tetragonitid ammonoid Tetragonites minimus from the Upper Cretaceous in Hokkaido, Northern Japan

Fig. 5. Characteristics of ratio of numbers and size of dimorphism in tetragonitid ammonoid Tetragonites minimus Shigeta, 1989, from the Yezo Group in Hokkaido, Japan. The specimens treated here were collected from various stratigraphic levels in the Santonian in the Kotanbetsu, Tappu, and Haboro areas. A. The ratio of numbers of dimorphic pairs. B. Compilation of the size distribution in phragmocone diameter (PD). C. Comparative representation of the size of dimorphic pairs with indication of the phragmocone and body chamber.