Ammonite Old Mollusk Jurassic Genuine FossilAmmonite (extinct mollusk), Prehistoric Fossil, Genuine, Late Jurrasic Early Cretaceous, Worldwide Shipping For sale is a real Ammonite fossil. Ammonites are extinct relatives of today's cephalopods including octupi, squids, cuttlefish etc. They had a coiled shell similar to that of the modern day nautilus. They were extant during the Jurassic and Cretaceous periods. Most of these fossils originate from Madagascar and a few from Russia. The fossils