This Specimen has been sold.
3.1 Inch Ammonite From Madagascar
Here is a polished 3.1 inch wide ammonite from the Mahajanga Province of 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 ago and they barely survived several major extinction events. The last lineages disappeared 65 million years ago at the end of the Cretaceous.