This Specimen has been sold.
Bargain, 4.1" Cut & Polished Ammonite (Anapuzosia?) Pair
Here is an 3.8", cut and polished Anapuzosia ammonite fossil from Madagascar.
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. The last lineages disappeared 65 million years ago at the end of the Cretaceous.