Cleoniceras Ammonite

Cleoniceras ammonite. Boxed as shown in images with information label on the side.
 
Ammonites were coiled shell cephalopods (animals characterized by bilateral body symmetry, prominent head and a set of arms or tentacles) that first appeared in the Early Devonian, 410 million years ago.
The name ammonite comes from a Roman author, known in English as Pliny the Elder, who called the fossils of these animals ammonis cornua (horns of Ammon) after the Egyptian god Ammon (Amun) who was typically depicted wearing rams' horns. Pliny the Elder thought the ammonites resembled tightly coiled rams horns.
Size: 2.5cm x 1.8cm x 0.6cm approx