ecoregions, the West Sahara desert and East Sahara desert, were designated in the hyper-arid center. The transitional North Saharan steppe and woodlands and South Saharan steppe and woodlands ecoregions were extended towards the central Sahara, and the South Saharan steppe and woodlands was renamed South Sahara desert. References Deserts and xeric shrublands Ecoregions of Algeria Ecoregions of Chad Ecoregions of Egypt Ecoregions of Libya Ecoregions of Mali Ecoregions of Mauritania Ecoregions of Niger Ecoregions of Sudan Sahara Palearctic ecoregions