This outstanding piece is the absolute cream top of our small Chengjiang collection. 
The digestive tract is like the muscular system or the vessel system perfectly preserved! 
There is nothing wrong with this piece, it is very rich in details and contrast.
It is hard to image a better preserved Naraoia !
Naraoiids are a simple diversified group inside the Arthopoda. Although they have lot of affinity's with trilobites they are a independent, "cognate" group. This results are based on the fact that Naraoiids do not have a calcium- carbonate hardened body parts. It is also improbable that they are a progenetic group*. (*R. Fortey in Kaesler et al 1997)

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