Ultrastructural examinations revealed concentric bodies in hyphae of a parasitic ascomycete, infecting pollen of Malva sylvestris ssp.mauritiana. These structures consist of three concentric zones and are similar to those found in mycobionts of several lichens and only a few nonlichenized ascomycetes. Typical septal pores of ascomycete hyphae were present, usually plugged by electron‐dense material and associated with one or more Woronin bodies.
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