This is a rare US trilobite. It is an outstretched Ditomopyge parvulus from Northeast Oklahoma. As most collectors know, Pennsylvanian trilobites are very rare - complete, prone ones are even rarer. But a complete, prone Ditomopyge from Oklahoma is almost unheard of. The bug is nicely outstretched and extremely inflated and 3-D. The natural reddish coloration contrasts beautifully with the grey-green matrix. The trilobite displays well on the natural block of matrix. This is one prone trilobite you do not see everyday.
This fossil was collected and obtained legally, and is also being sold legally.