1 in stock


The Orthoceras, or “straight horn” is an extinct cephlapod from the Ordovican Period, around 400 million years ago.  These straight shelled nautiloids ranged in size from less than a centimeter to more than 14 feet long.  It is believed that like current day nautiloids such as squid and octopus, the Orthoceras was a predator, possibly eating little trilobites for a snack.

This Orthoceras measures 6.75 inches long and 1.76 inches wide.  Look at the beautiful segments and siphuncle, the tube that runs the length of their body to help with buoyancy and water propulsion.

This is the specimen you will receive.