Three Ammonite (Hammatoceras) Fossils - Belmont, France

This is an association of three fossil ammonites of the genus Hammatoceras that was collected near Belmont, France. They are Toarcian (Jurassic period) in age, or approximately 180 million years old. The larger ammonite is 4.4" wide and the smaller ammonites measure 3.3" and 1.8" wide. The ammonites have been partially exposed from the rock they were found in, with one edge cut flat for presentation purposes. There is a partial, unidentified belemnite near the base of this specimen.

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.

Hammatoceras sp.
Belmont, France
Largest Ammonite: 4.4" wide, Entire specimen: 7 x 6.2"
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