A new lichen community, the Lecidelletum crystallinae ass. nova, is described here. It occurs on gypsum crusts in the Namib Desert, an almost rainless coastal fog region of southwest Africa. In addition to Lecidella crystallina, the community is also characterized by Caloplaca volkii and Buellia sipmanii Bungartz & Wirth sp. nova. Although widespread throughout the Namib, the new association only occurs in reach of the coastal fogs. Keywords: lichen community, Buellia, gypsum, Namib Desert.