3.2" Ammonite (Prionocycloceras) From Madagascar - Unusual Species

Ammonite (Prionocycloceras) From Madagascar - Unusual Species #113163

Here is a beautiful ammonite fossil of the genus Prionocycloceras sp., collected from Toliara, Madagascar. Some of the exterior shell has chipped polished away, exposing the suture pattern beneath. These ammonites are Upper Cretaceous, Coniacian Stage or approximately 86-90 million years old.

It comes with an acrylic display stand.

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