 "P. tuberculatus" is known from four isopods, both female and male, all of which are inclusions in three different transparent chunks of Dominican amber.Two of the paratypes are fossils in the same amber specimen while the other two individuals are both in separate amber specimens.The amber specimens which entomb the holotype and paratypes, are currently preserved in the Division of Invertebrate Zoology collections at the Staatliches Museum für Naturkunde Stuttgart in Stuttgart, Germany.