Pentaphyllus reibnitzi sp. nov. from Cyprus is described, representing the fourth species of Pentaphyllus from the western Palaearctic Region. All four species from this area are figured, a key for their identification and selected faunistic data are given. Two species have a wider distribution in the western Palaearctic Region, and two are restricted to limited areas in Azerbaijan or Cyprus, respectively. The type specimens of the new species were found in polypores, collected from a dead tree of Ficus carica in an extensively cultivated garden near seashore. Lectotype of Pentaphyllus nitidulus Reitter, 1884 is designated.