Mesozoic Perisphinctes Ammonite Fossil Replica, 4cm

This ammonite fossil replica from the Mesozoic measures approximately 1.5 inches (4cm) and is made from durable resin designed to withstand heavy classroom and laboratory use. Ammonites grew their calcium carbonate shells continuously throughout their lives and were relatives of modern octopi and squids that swam through the open ocean preying on smaller marine animals. Suitable for paleontology and geology classroom lessons, including fossil dig activities. Shell segments can be counted to determine the age of the animal.