Two new species of Caloplaca from Tadjikistan, Central Asia

Two new species of Caloplaca are described, C. pseudocitrina (in the C. citrina group), which is characterized by rather long spores with a thin septum, and a squamulose thallus and C. akbarica ( C. saxicola-growp ) characterized by rather thick, brightly yellowish pruinose apothecia and a parapiectenchymatous proper exciple. The characters of the new species and their closely allied taxa are compared in tables and illustrated.