Spectacular Balanocidaris Urchin Fossil - Morocco

This is a pretty spectacular fossil of the sea urchin Balanocidaris. It's 1 3/4 inches wide and fully inflated with great preservation. The knobs of the surface is where the spines would have been attached while it was living. This is one of the less frequently offered types of urchin fossils from the area and this one is one of the better examples I've seen.