Acaulon fontiquerianum (Pottiaceae), a new species to the bryophyte flora of Turkey and SW Asia

Acaulon fontiquerianum Casas & Sergio (Pottiaceae) is reported for the first time from Turkey and Southwest Asia. The species is briefly described and illustrated, and a key for Turkish Acaulon Mull. Hal. species is provided. The distribution of all Acaulon species known from Turkey is presented.