| Brief Description |
Ammonites were an enormous diverse group of animals related to squid and nautilus, which went extinct simultaneously with the dinosaurs. Nothing is known about this fine large ammonite specimen except what we can decipher from a faded fountain-pen inscription on the back, which enabled French ammonite expert expert Hervé Châtelier to identify it as Peltoceratoides williamsoni, from the popular ammonite-collecting coastal town Villers-sur-Mer, in Calvados, Normandy. It dates back to the Oxfordian stage of the late Jurassic (164 to 157 million years ago).
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