RICHARD BIZLEY / SCIENCE PHOTO LIBRARY RICHARD BIZLEY / SCIENCE PHOTO LIBRARY
Sphenodiscus ammonite. Artwork of a Sphenodiscus ammonite, showing this marine invertebrate emerging from its shell. Ammonites were marine molluscs that formed a spiral shell to protect their soft body. Ammonites first appear in the fossil record around 400 million years ago and became extinct at the end of the Cretaceous Period 65 million years ago.
Model release not required. Property release not required.