This Specimen has been sold.
Huge 8.5" Wide Polished Phylloceras Ammonite
This is a huge, 8.5" wide Phylloceras ammonite collected in the Mahajanga Province of Madagascar. The exterior has been highly polished and you can see the beautiful suture patterns just beneath the transluscent shell. An absolutely gorgeous piece. This is a very thick, heavy ammonite fossil weighing about 8 1/2 lbs.
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. True ammonites appeared in the fossil record about 240 million years ago. The last lineages disappeared 65 million years ago at the end of the Cretaceous.