14.5" Giant, Bumpy Ammonite (Douvilleiceras) Fossil

Giant, Bumpy Ammonite (Douvilleiceras) Fossil #279781

This is a giant, 14.5" wide Douvilleiceras ammonite from the Upper Cretaceous of Madagascar. This genus of ammonites has earned the local name "Tractor Ammonites", due to their distinctively bumpy surface and pronounced ridges making them resemble a tractor tire. Weighing 55 lbs this might be the largest example of this genus I've seen available. It has been prepared free from the surrounding rock, lightly polished and there are several smaller ammonites still attached to it.

It comes with a metal display stand.

Ammonites were predatory cephalopod mollusks that resembled squids with spiral shells. They are more closely related to living octopuses, though their shells resemble that of nautilus species. True ammonites appeared in the fossil record about 240 million years ago during the Triassic Period. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

What an ammonite would have looked like while alive.

More about ammonites