This Specimen has been sold.
Big Bodied Desmoceras Ammonite - 2.8 inches
This is a polished ammonite of the genus Desmoceras. It is much thicker (1 1/4 inches) than the more common Cleoniceras ammonites. This specimen is just under 3 inches across.
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.