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Ammonite - Fossilized with white external Ridges


Fossilized Ammonite with white external ridges. 

Ammonites appeared ~520 million years ago and were marine Mollusc animals in the subclass Ammonoidea of the class Cephalopoda The few species living today have the largest brains and keenest sights of all animals without backbones.

Dimensions: 6.4 cm x 5.7 cm x 1.9 cm