The continental malacofauna of Arabia and adjacent areas, IV. Revision of the family Cerastidae in the Soqotran Archipelago, I: the genus Passamaella L. Pfeiffer 1877, with description of a new genus and species (Gastropoda: Pulmonata: Cerastidae). Archiv fuer Molluskenkunde, 134(1), July 2005: 1-21. 4 [Zoological Record Volume 142]