3.496Kg
270mm wide x 300mm high x  40mm deep
 
Orthoceras are prehistoric cephalopods related to squid and octopus. This beautiful orthoceras (meaning “Straight Horn”) fossil is from the Sahara Desert in Morocco. It dates to the Devonian Period – 395 to 345 million years old! These ancient mollusks had long, straight shells divided into chambers connected by a tube, called the “siphuncle”. The creature lived in the largest chamber at the top, and would exchange air and water between the other chambers to regulate buoyancy.