Trilobite from Missouri

Large, intact trilobite specimen with the cephalon (head), thorax and pygidium visible.

Type: Isotelus iowensis 
From: Elsberry, Lincoln County, Missouri  
Age: Ordovician
Approximate size: measures 16.6 cm long by 9.8 cm wide. 
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From the collection of Kevin Conroy - http://www.kcminerals.com/

Positive (compression) and negative (impression) sides of the fossil. The positive is on the right in the photograph.

Conularia (4.4 cm long by 1.3 cm wide) located next to the trilobite.