Two Jurassic Ammonite Fossils - Dorset, England

This is a 5.6" wide, polished ammonite (Euhoploceras modestum) fossil from Dorset, England. It is Lower Jurassic in age, or approximately 160 million years old. The larger ammonite is accompanied by a smaller Darellia poltia that is 1.8" wide. It is prepped completely free of the rock it was found in and comes with 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.

What an ammonite would have looked like while alive.

More about ammonites