Agatized Promicroceras Ammonite Cluster - England

This is a beautiful cluster of agazied Promicroceras planicosta ammonite fossil from the Lyme Regis region of England It's almost translucent and has been nicely prepared so that it displays very nicely in a slab of limestone.

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 ago and they barely survived several major extinction events. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

Promicroceras planicosta
Charmouth, Dorset, England
Lower Lias, Obtusum Zone
Ammonites .6 to .9" wide, Matrix 5x4.2
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