Mycosphaerella buna sp. nov. with a Pseudocercospora anamorph isolated from the leaves of Japanese beech

A species of Mycosphaerella with a Pseudocercospora anamorph was collected on overwintered fallen leaves of Japanese beech, Fagus crenata, Based on comparison of morphology with Mycosphaella species on Fagaceae, the fungus was newly described as Mycosphaerella buna, The Pseudocercospora anamorph derived from a single ascospore of the fungus was morphologically identical to an endophytic anamorph isolated from asymptomatic living leaves of Japanese beech,