Palaeoconchus Worm Fossil

The fossil the blue arrow is pointing to appears to be a Palaeoconchus (aka Spirobus) worm fossil. It was found in the Glen Dean formation.of Grayson County, Kentucky USA. The fossil dates to the Mississippian Period. The worm fossils is intermixed with bryozoans (maybe Fenestella). Image was taken with a microscope with an approximate 4 mm field of view (FOV).

Learn more about this worm fossil at the Falls of the Ohio State Park web site:
http://www.fallsoftheohio.org/Fossil_Worms.html

Thanks to Kenny for the image for this blog posting.