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Ellipsocephalus

The cephalon (The Head) is the widest part of the exoskeleton. It has a large, rounded glabella (Face) and rounded lateral cheeks (Where the eyes would be). 
The margin of the cephalon is smooth, without spines. The tapering thorax (Chest) has between twelve and fourteen segments (Rib like parts), and a slight groove separates the lateral segments from the thoracic axis (The point were the Trilobite would curl up to a ball, for protection). The pleurae (Outer body or chest) divided into two near their edges.

This type of Trilobite was first described in 1825, and so is one of the first Trilobite genera recognised.