Published as part of Shelley, Rowland M. & Snyder, Bruce A., 2012, Millipeds from the eastern Dakotas and western Minnesota, USA, with an account of Pseudopolydesmus serratus (Say, 1821) (Polydesmida: Polydesmidae); first published records from six states and the District of Columbia, pp. 1-17 in Insecta Mundi 2012 (239) on page 7, DOI: 10.5281/zenodo.5174370

Figure 4. Distribution of Pseudopolydesmus serratus showing peripheral localities. Upper star, type locality of Polydesmus canadensis Newport, 1844, type-species of Pseudopolydesmus; Lower Star, denoted by the arrow, approximate type locality of Polydesmus serratus Say, 1821, on the Eastern Shore of Virginia.