Mycena brunneomarginata Robich, una nuova specie della sezione Rubromarginatae dalla Catalogna

Mycena brunneomarginata Robich, una nova espècie de la secció Rubromarginatae trobada a Catalunya. Es descriu i comenta una nova espècie de la secció Rubromarginatae: Mycena brunneomarginata, recol·lectada al Parc Natural del Montseny en les IX Jornades de la CEMM, a St. Hilari Sacalm. Es diferencia d' altres espècies de la secció principalment pel marge de les làmines de color bru.Mycena brunneomarginata Robich, a new species in the section Rubromarginatae collected in Catalonia. Mycena brunneomarginata, a new species collected in Catalonia during the IX Jornades Micològiques de la CEMM, in the Natural Park of the Montseny, is here described. It mainly differs from other entities of the section Rubromarginatae by the brown color of the edge of the lamellae

Mycena brunneomarginata Robich, una nuova specie della sezione Rubromarginatae dalla Catalogna

Mycena brunneomarginata Robich, una nova espècie de la secció Rubromarginatae trobada a Catalunya. Es descriu i comenta una nova espècie de la secció Rubromarginatae: Mycena brunneomarginata, recol·lectada al Parc Natural del Montseny en les IX Jornades de la CEMM, a St. Hilari Sacalm. Es diferencia d' altres espècies de la secció principalment pel marge de les làmines de color bru.Mycena brunneomarginata Robich, a new species in the section Rubromarginatae collected in Catalonia. Mycena brunneomarginata, a new species collected in Catalonia during the IX Jornades Micològiques de la CEMM, in the Natural Park of the Montseny, is here described. It mainly differs from other entities of the section Rubromarginatae by the brown color of the edge of the lamellae

Alcune interessanti mycena

Hom descriu en aquest treball algunes espècies (Mycena abramsii, M. amicta , M. olida, M. mirata e M. pseudopicta) recol·lectades durant la primera Reunió de la Confederació Europea de Micologia Mediterrània, que tingué lloc a l'Estartit, Girona. Espanya.Some species (Mycena abramsii, M. amicta, M. olida, M. mirata e M. pseudopicta) collected during the first meeting of the Confederazione Europea Micologica Mediterranea in l'Estartit. Girona, Spagna, are here described

Mycena fuscoumbilicata

International audienc

Filling gaps in biodiversity knowledge for macrofungi: contributions and assessment of an herbarium collection DNA barcode sequencing project.

Despite recent advances spearheaded by molecular approaches and novel technologies, species description and DNA sequence information are significantly lagging for fungi compared to many other groups of organisms. Large scale sequencing of vouchered herbarium material can aid in closing this gap. Here, we describe an effort to obtain broad ITS sequence coverage of the approximately 6000 macrofungal-species-rich herbarium of the Museum of Natural History in Venice, Italy. Our goals were to investigate issues related to large sequencing projects, develop heuristic methods for assessing the overall performance of such a project, and evaluate the prospects of such efforts to reduce the current gap in fungal biodiversity knowledge. The effort generated 1107 sequences submitted to GenBank, including 416 previously unrepresented taxa and 398 sequences exhibiting a best BLAST match to an unidentified environmental sequence. Specimen age and taxon affected sequencing success, and subsequent work on failed specimens showed that an ITS1 mini-barcode greatly increased sequencing success without greatly reducing the discriminating power of the barcode. Similarity comparisons and nonmetric multidimensional scaling ordinations based on pairwise distance matrices proved to be useful heuristic tools for validating the overall accuracy of specimen identifications, flagging potential misidentifications, and identifying taxa in need of additional species-level revision. Comparison of within- and among-species nucleotide variation showed a strong increase in species discriminating power at 1-2% dissimilarity, and identified potential barcoding issues (same sequence for different species and vice-versa). All sequences are linked to a vouchered specimen, and results from this study have already prompted revisions of species-sequence assignments in several taxa

Assessment of concordance between taxonomic (herbarium determination) and DNA similarity assignment using nonmetric multidimensional scaling (NMDS) ordination of the pairwise genetic distance matrix.

<p>a. Data symbols coded by genus. b. Data symbols coded by family.</p

Association between taxon (controlled for specimen age) and PCR amplification success using primers ITS1F and ITS4.

<p>Pearson Chi-square test of independence: p<0.0001. Asterisks denote categories with standardized adjusted residuals significant α = 0.05. See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0062419#pone.0062419.s005" target="_blank">Table S3</a> for data and post hoc test results.</p

Plot of within- and between-species nucleotide divergence (bp).

<p>Plot of within- and between-species nucleotide divergence (bp).</p

Association between specimen age and PCR amplification success using primers ITS1F and ITS4.

<p>Pearson Chi-square test of independence (N = 2763, d.f. = 2) significant at p<0.0001. Asterisks denote categories with standardized adjusted residuals significant at a Bonferroni-corrected α = 0.00833. See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0062419#pone.0062419.s004" target="_blank">Table S2</a> for data and post hoc test results.</p