Millipedes are segmented, terrestrial arthropods with a long, cylindrical body. Each body segment has two pairs of legs, thus leading to the name “thousand-leggers” for modern species. Rare specimens are known from shales associated with coal beds in Pennsylvanian rocks of eastern Ohio.
- Hannibal, J. T., 1996. "Phylum Arthropoda: Phyllocarids, Millipedes, Insects, and Other Less Common Forms," in Fossils of Ohio, edited by R. M. Feldmann and Merrianne Hackathorn. Ohio Division of Geological Survey Bulletin 70, p. 124-131.