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Coprinopsis neocinerea sp. nov. (Basidiomycota, Agaricales , Psathyrellaceae), is a new Coprinoid ammonia fungus from broadleaf mixed forest in Vietnam. In macro- and micromorphology, this species is similar to C. cinerea , but differs in having upheaved and humpbacked abaxial side shape of basidiospores. Phylogenetic analysis with nuclear ribosomal internal transcribed spacer (ITS) data also supports this new taxon. • One new ammonia fungus Coprinopsis neocinerea from Vietnam is described. • Phylogenetic analysis supported species in genus Coprinopsis subsection Lanatuli. • This new species is distinct by having an upheaved and humpacked basidiospores. [ABSTRACT FROM AUTHOR]

The article reports on the results of a study of inter-subspecies hybrid dikaryons of oyster mushroom independently isolated in Vietnam and Japan. A description of the experimental set-up and measurement methods is presented. The study concluded that the asexual reproduction might allow stable maintenance of a particular pair of nuclei.