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Ammonites

Ammonites

An extinct group of Cephalopoda, with solid external skeletons. They are excellent index fossils.

Biology

Keywords

Ammonites, prehistoric creature, Ammonoidea, fossil, Cretaceous period, Jurassic period, Devonian period, siphuncle, exoskeleton, Cephalopoda, molluscs, cephalopods, animal, biology

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