This Specimen has been sold.
1.02" Agatized Ammonite (Promicroceras) Fossil - Lyme Regis
This is a very beautiful Promicroceras planicosta ammonite fossil which has been agatized, collected from the Lyme Regis region of England. It's almost translucent and has been nicely prepared so that it displays very well on the limestone slab.
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.