Güvenç, S., John, V. & Türk, A.: Phytogeographical analysis of the lichens and lichenicolous fungi of Turkey. -Borziana 1: 87-108. 2020. The aim of the paper is to evaluate the diversity of all known lichenized and lichenicolous fungi of the Turkish provinces, their similarities being calculated and to determine their distribution in the geographic and phytogeographic regions of Turkey. The records of lichenized fungi in "A Checklist of the Lichens of Turkey" were evaluated, together with new

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... untry and province records from 2015 to 2020. A total of 1765 lichenized fungi were evaluated from the 81 provinces. The geographical regions of Turkey were divided into three main groups according to the similarity in species diversity (1) Aegean, Mediterranean and Marmara, (2) Central, Eastern and Southeastern Anatolia, and (3) the Black Sea region. The phytogeographical regions of Turkey were divided into two main groups (1) Euro-Siberian and Mediterranean and (2) Irano-Turanian. The very heterogeneous intensity so far of the research on lichens in the different provinces of Turkey causes only a weak correlation of the distribution of lichens with the geographic and phytogeographic regions.