Pseudactium credoi Owens and Carlton, new species, is described from three male specimens collected at a blacklight in Wilson County, Tennessee. Pseudactium credoi is similar to Pseudactium parabolicum (Brendel) and Pseudactium ursum Carlton in the form of the ventral projections of ventrite III, but secondary sexual modifications on the legs and the form of the aedeagus differ in ways that are consistent with species boundaries among other pselaphine taxa. A modified key to the species of Pseudactium Casey is provided to allow for the separation of P. credoi from the other twelve described species in the genus. This is the third species of Pseudactium described since the last revision of the genus.
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Vol. 71 • No. 3