This ancient cephalopod, often described as a “living fossil,” was sighted in late ... one of the oldest surviving members of the nautiloid family, a group of cephalopods that also includes ...

Ammonites were shelled cephalopods that died out about 66 million years ago. Fossils of them are found all around the ... octopuses and cuttlefishes), nautiloids (the nautiluses) and ammonites.