Fossil Ammonite Poster by The Nature Gallery

The Fossil Ammonite Poster by The Nature Gallery is an amazing closeup macrophotograph of a fossilized ammonite.  This is from the genus Cleoniceras, found in sediments on Madagascar dated at 65 million years ago. These ancient ancestors to living pearly nautilus were once covered with shell-like armor that has since worn away over time allowing us see this beautiful creature's internal structure!