A new species of oribatid mite of the family Galumnidae is described and illustrated based on adult specimens from soil in Mashhad county, Razavi Khorasan Province, northeastern Iran. Pilogalumna khorasanica sp. nov. is characterised by rounded rostrum; very long interlamellar setae; long, nearly setiform, finely bilaterally barbed bothridial setae; medially interrupted dorsosejugal furrow; elongated porose areas A2, very long and narrow, ribbon shaped A3 and large body size. The new species is most similar morphologically to Pilogalumna crassiclava longiareata (Pérez-Íñigo, 1976), however, differs from it in morphology of bothridial setae and structure of notogastral porose areas, by the presence of longer interlamellar setae and larger body size. An updated identification key to known species of Pilogalumna is presented.