New species and reports of Hypoxylon from Argentina recognized by a polyphasic approach

A preliminary account of Hypoxylon species (Xylariaceae) from the hitherto widely unexplored “Yungas” mountain forests of Northwest Argentina is presented. Two new species are described based on extensive morphological, molecular (ITS region of rDNA, partial β-tubulin gene) and chemotaxonomic data....

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Bibliographic Details
Published in:Mycological progress 2016-04, Vol.15 (4), p.1, Article 42
Main Authors: Sir, Esteban Benjamin, Kuhnert, Eric, Lambert, Christopher, Hladki, Adriana I., Romero, Andrea I., Stadler, Marc
Format: Article
Language:English
Subjects:
Bark
Biodiversity
Biomedical and Life Sciences
Ecology
Life Sciences
Metabolites
Microbiology
Morphology
Mountain forests
National parks
Original Article
Plant Sciences
Ribosomal DNA
Secondary metabolites
Taxonomy
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Summary:A preliminary account of Hypoxylon species (Xylariaceae) from the hitherto widely unexplored “Yungas” mountain forests of Northwest Argentina is presented. Two new species are described based on extensive morphological, molecular (ITS region of rDNA, partial β-tubulin gene) and chemotaxonomic data. Hypoxylon spegazzinianum is close to H. erythrostroma , but differs by larger ascospores and a virgariella-like asexual morph. Hypoxylon calileguense resembles H. subgilvum when growing on wood, but can be distinguished by larger ascospores and a fawn to brick stromatal surface colour. Stromata found on bark have affinities to H. pelliculosum , but differ in their stromatal surface colour and conspicuous amyloid apical apparatus. In addition, nine taxa of Hypoxylon are reported for Argentina for the first time, and some details on their asexual state and stromatal secondary metabolites are reported. An updated dichotomous key for Hypoxylon species from Argentina is provided.
ISSN:1617-416X
1861-8952
DOI:10.1007/s11557-016-1182-z