I believe this graptolite fossil is of the genus Geniculograptus. The fossil was photographed under a microscope at 23 magnification. The fossils is approximately 5.1 mm long. It was found in the Kope Formation (Edenian Stage?) of Carroll County, Kentucky, USA. Fossil dates to Ordovician Period.
Learn more about this fossil at this site.
https://strata.uga.edu/cincy/fauna/graptolithina/Geniculograptus.html
