This Specimen has been sold.
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 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. The last lineages disappeared 65 million years ago at the end of the Cretaceous.