May be hard to say, I'm no paleontologist, but is possibly an annelid due to shape and segmentation. However, it could also be the only chitinous or sclerotised body parts of a larger organism, if we apply the lessons learned from anomalocaris.
Hi all,
No real idea, but it looks like a section of a Trilobite with a long thin body plan. There is a fossil Horsetail, Calamites that is also segmented, but wouldn't have the defined central section, "axial ring" if it is a Trilobite: <http://www.trilobites.info/trilomorph.htm>.