Dofeliceras ammonites date to the Upper Cretaceous period and were discovered at Erfoud. It is a very fine piece. You can see the details of the ammonite very clear.
 
Ammonites were predatory mollusks that resembled a squid with a shell. These cephalopods had eyes, tentacles, and spiral shells. They are more closely related to a living octopus, though the shells resemble that of a nautilus.
 
True ammonites appeared in the fossil record about 240 million years ago. The last lineages disappeared 65 million years ago at the end of the Cretaceous.