This Specimen has been sold.
5.2 Inch Ammonite With "Oak Leaf" Sutures
Here is a gorgeous polished Cleoniceras ammonite fossil from the Cretaceous deposits of Madagascar. It's very large at 5.2 inches across and heavy. This exotic ammonite displays the spectacular "oak leaf" suture pattern of this species. It is large and very beautiful example of this 110 million year old fossil sea creature.
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. Ammonites appeared in the fossil record about 240 million years ago and they barely survived several major extinction events. The last lineages disappeared 65 million years ago at the end of the Cretaceous.