On the taxonomy of Gyrohypnus Leach: New synonymies, new species, and a key to the Western Palaearctic and Middle Asian representatives of the genus (Insecta: Coleoptera: Staphylinidae). Entomologische Blaetter fuer Biologie und Systematik der Kaefer, 99(1-3), Dezember 2003: 55-81. 72 [Zoological Record Volume 140]