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The lack of useful determination keys is often a
major obstacle for naming species of Ascomycota,
especially for the amateur mycologist.
One group of fungi in need of a key are
species of Dothideomycetes with hysterioid
ascomata on bark and wood in Scandinavia,
and we present such a key encompassing 31
species in 14 genera. Hysterothecia are common...
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