Cryptosphaeria multicontinentalis, a new record for the funga of Iran

During collecting and identifying of Xylariales fungi (Ascomycota) of Iran, a specimen was collected from Siahkal forest (Guilan Province, northern Iran) in autumn ۲۰۲۱. Based on morphological and molecular (ITS sequence) data, this fungus was identified as Cryptosphaeria multicontinentalis, which is the first report for the funga of Iran. Detailed taxonomic and phylogenetic information related to this species is described and illustrated. In addition, an updated list of species of Diatrypaceae is provided from Iran.