Four Fossil Ammonites (Promicroceras) - Lyme Regis

This is a cluster of four, small, agate replaced, Promicroceras planicosta ammonite fossils from Lyme Regis, England. The largest ammonite .65" wide.

Comes with an acrylic stand.

Ammonites were predatory cephalopod mollusks that resembled squids with spiral shells. They are more closely related to living octopuses, though their shells resemble that of nautilus species. True ammonites appeared in the fossil record about 240 million years ago during the Triassic Period. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

What an ammonite would have looked like while alive.