- Fossil -
360 Million Years Old
The shell of Orthoceras is shaped like a slowly tapering cylindrical cone, and is made up of closely spaced concavo-convex chambers, joined together by a centrally pplaced tube caled the siphuncle.
Habitat: Orthoceras was an active swimmer, with the shell positioned horizontally in the water. It scavenged and predated on small animals.
Measurements: 38mm x 27mm