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1.6" Jurassic Ammonite (Liparoceras) Fossil - England
This is an ammonite fossil of the species Liparoceras pseudostriatum, collected near Gloucestershire, England. It's Jurassic - Pliensbachian in age, or approximately 185 million years old. The ammonite is very wide, and preserves many of the distinctive bumps/nodes along it's shell.
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. The last lineages disappeared 65 million years ago at the end of the Cretaceous.