Abstract
Slime molds (herein limited to the myxomycetes) are fungus-like organisms associated with dead plant material in terrestrial ecosystems, with approximately 1000 species known worldwide. Slime molds are usually found in relatively moist habitats, so one might not expect them to occur in deserts and other arid areas. However, the number of species reported from this type of habitat is often surprisingly high.Very little is known about the slime molds of Saudi Arabia, including those regions of the country classified as deserts. The objectives of the present paper are (1) to review what is currently known about Saudi Arabian slime molds, (2) to report 15 species and four genera that are new records for the country, and (3) to discuss the need for additional studies.