Pseudopolydesmus is a genus of flat-backed millipedes in the family Polydesmidae.

Species Formerly, there were at least 12 described species in the genus Pseudopolydesmus.Hoffman, R.L. (1999). "Checklist of Millipeds of North and Middle America". Virginia Museum of Natural History, Special Publication No. 8 Presently however, following a review published in 2019 which used scanning electron microscopy and ultraviolet fluorescence to produce detailed images of specimens, only the following eight species are recognised: Pseudopolydesmus caddo Chamberlin, 1949 Pseudopolydesmus canadensis (Newport, 1844) Pseudopolydesmus collinus Hoffman, 1974 Pseudopolydesmus erasus (Loomis, 1943) Pseudopolydesmus minor (Bollman, 1888) Pseudopolydesmus paludicolus Hoffman, 1950 Pseudopolydesmus pinetorum (Bollman, 1888) Pseudopolydesmus serratus (Say, 1821)

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