This dataset contains the digitized treatments in Plazi based on the original journal article Shear, William A., Marek, Paul E. (2019): Urochordeumatidae Silvestri, 1909, a millipede family endemic to Washington State, USA (Chordeumatida, Striariidea, Striarioidea). Zootaxa 4657 (2): 352-360, DOI: https://doi.org/10.11646/zootaxa.4657.2.7