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Seifert, Keith A., Gerry Louis-Seize & Glen Sampson. Myrothecium acadiense, a new hyphomycete isolated from the weed Tussilago farfara. Mycotaxon 87: 317 - 327. 2003.

ABSTRACT: Myrothecium acadiense, isolated from leaves of the weed Tussilago farfara collected in Nova Scotia, Canada, is described as a new anamorph species. It produces sporodochial conidiomata, percurrently proliferating conidiogenous cells, a green, slimy conidial mass and unusual cylindrical conidia that are swollen and convex at the base. Despite the fact that most species of Myrothecium have phialidic conidiogenous cells, a phylogenetic analysis of aligned DNA sequences of the 5' end of the large subunit (LSU) rDNA suggest that M. acadiense is closely related to the type of the genus, M. inundatum, tentatively placed in the Bionectriaceae, Hypocreales. Some comments are included on the relationships and generic concept of Trichothecium roseum.

KEYWORDS: taxonomy, phylogeny, large subunit ribosomal DNA, Bionectriaceae, Trichothecium

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