This Specimen has been sold.
3.8" Fossil (Androgynoceras) Ammonite - Germany
This is a 3.8" fossil Ammonite (Androgynoceras) from Westphalia, Germany. This very nice specimen shows the outer shell of the ammonite as well as a cast of the inside of the shell. The ammonite has mostly been prepped free from the rock it was found in, however the remaining rock has been cut flat, allowing for aesthetic presentation without the need of a display stand.
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.