Pictures of conodont pieces from Jefferson County, Indiana. These fossil pieces belonged to creatures existing in the Upper Ordovician Period of Maysvillian-Cincinnatian Stage.
Thanks to Kenny for the images. [UPDATED: Thanks to Solius Symbiosus for correcting me about these not being scolecodonts but instead conodonts.]
Every fossils is about 1-3 mm in length and have been magnified 20x. Note they are also glued down to a slides so there is a residue in the background.