3.3" Fossil Heteromorph (Nostoceras) Ammonite - Madagascar

This is a really cool heteromorph ammonite (Nostoceras sp.) fossil from Madagascar. Unlike most ammonites that lived in tightly coiled, spiral shell that retains their shape throughout the cephalopod's life, heteromorph ammonites have irregularly-coiled or uncoiled shells. These hetermorph ammonites are Late Cretaceous in age (Campanian Stage) or approximately 70 million years old.

Almost all of the surrounding limestone has been painstakingly removed to provide the best picture of the entire ammonite. There may be some compositing on this specimen and/or restoration along the thickest part of the spiral.