This Specimen has been sold.
1.4" Ammonite (Pleuroceras) Fossil - Burgebrach, Germany
This is a Pleuroceras spinatum ammonite fossil from Buttenhaim, Germany with a dark brown shell. These ammonites are Lower Jurassic in age, approximately 185 million years old. It's partially exposed inside of a concretion that was cracked open.
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.