A BOWLING BALL

At first glance, it looks more like a bowling ball than an ammonite: the diameter and thickness of the shell are almost identical! Interestingly, these spherical shells are practically always completely preserved and, unlike other disc-shaped species from this locality, show hardly any damage caused by bites from large fish and marine reptiles. However, frequent regenerated shell injuries on the mouth rim indicate attacks by crabs. This suggests that ammonites with such less streamlined shells generally lived directly on the sea floor.