This Specimen has been sold.
2.15" Pyritized Ammonite (Pleuroceras) Fossil - Germany
This is a beautiful pyritized ammonite (Pleuroceras spinatum) fossil collected from the Holzbachacker clay pit near Buttenheim, Bavaria/Germany. It's Jurassic, Pliensbachian stage or approximately 190 million years old. The surrounding rock has been removed to expose this ammonite. You can feel the heft of the iron pyrite in the specimen when you hold it in your hand.
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.