Lot: 5Kg Bumpy Ammonite (Douvilleiceras) Fossils - 23 pieces

Lot: Kg Bumpy Ammonite (Douvilleiceras) Fossils - pieces #103222

This is a wholesale lot of 23 Douvilleiceras ammonites weighing 5kg from the Upper Cretaceous of Madagascar. They range in size from 2.7 - 4". 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.

Ammonites were predatory mollusks that resembled squids with shells. These cephalopods had eyes, tentacles, and spiral shells. Though their shells resemble that of a nautilus, they are actually more closely related to living octopuses. Ammonites appeared in the fossil record about 240 million years ago, barely surviving several major extinction events. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

Artist's reconstruction of an ammonite, by Nobu Tamura

More about ammonites