Fig. 8 in Dimorphism in tetragonitid ammonoid Tetragonites minimus from the Upper Cretaceous in Hokkaido, Northern Japan

Fig. 8. Two categories of the preservation pattern of the body chamber of tetragonitid ammonoid Tetragonites minimus Shigeta, 1989, from the Santonian, Yezo Group in the Haboro, Kotanbetsu, and Tappu areas, Hokkaido, Japan. A. MCM-W1549, complete or almost intact specimen, note the interiors of the body chamber filled with sparry calcite. B. MCM-W1555, incomplete specimen. In lateral (A1, B1) and median section (A2, B2) views. Arrowheads indicate the last septum. Scale bars 5 mm.