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Ascomycota. 
 Dothideomycetes. Patellariales: Patellariaceae Lecanidion atratum / Patellaria atrata Microscope photographs below.  | 
	
 
Microscope photographs
Lecanidion atratum
On Lavatera arborea and Ulmus. Studland and Upton, Dorset. April 2015, January 2018