The orthoceras fossils in this piece of black Moroccan limestone come from a species of extinct marine cephalopods known as orthocone nautiloids. They

---

The orthoceras fossils in this piece of black Moroccan limestone come from a species of extinct marine cephalopods known as orthocone nautiloids. They date from the Devonian Period, approximately 400 million years ago. They are ancestors of ammonites, squids, octopuses and cuttlefish.

---

Size: 3552px × 4944px
Photo credit: © SHEILA TERRY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: cephalopods, creatures, cuttlefish, devonian, extinct, fossil, marine, nautiloids, octopus, orthoceras, orthocone, sea, silurian, squds