nLSU Sequence Data Research Articles

Perenniporiopsis srijayewardenepurana sp. nov. and validation of Pyrrhoderma nigrum in Sri Lanka

Polypores, a diverse group of macrofungi belonging to Basidiomycota, are widespread in tropical and subtropical regions worldwide. In this study, four polyporoid specimens were collected in the Western Province of Sri Lanka. Based on multilocus phylogenetic analyses of combined ITS and nLSU sequence data, along with morphological characteristics, the specimens were identified as Pyrrhoderma nigrum (Pyrrhoderma “nigra”) and a novel species of a recently described genus Perenniporiopsis. The new species was named P. srijayewardenepurana, while P. nigrum, which has not been validly published previously, is validated in this publication.

Galbinothrix, a new monotypic genus of Chrysotrichaceae (Arthoniomycetes) lacking pulvinic acid derivatives

AbstractGalbinothrix caesiopruinosa is described from Japan and Korea. The new genus and species is placed in Chrysotrichaceae by its ascoma morphology and by a phylogenetic analysis of mtSSU and nLSU sequence data using Bayesian and maximum likelihood inference. The monotypic genus Galbinothrix is superficially similar to Chrysothrix caesia in having dark brown ascomata covered by a thin bluish grey pruina, reddish brown ascomatal pigment in the epithecium and proper exciple, the greyish green to yellowish olive thallus, and usnic acid as the main secondary thallus compound. It differs from this species and all other Chrysotrichaceae by its large, oblong, thick-walled ascospores with a distinct epispore, the narrowly clavate to almost tubular asci, and the never clearly granular to leprose thallus.

Morphological and molecular evidences for a new species of Datroniella (Polyporales, Basidiomycota) from Brazil

Datroniella minuta sp. nov. from Northeast Brazil is described on the basis of morphological characteristics and ITS and nLSU sequence data analyses. This species is characterized by tiny and cupulate basidiomata and large cylindrical basidiospores. A key for species of Datroniella, drawings of the micro-characteristics, color photograph of the basidiomata and phylogenetic tree to show the placement of the new species are provided.

Alignment, clade robustness and fungal phylogenetics- Crepidotaceae and sister families revisited.

The circumscription and delimitation of the agaric family Crepidotaceae and related families in the Agaricales have been analysed using nLSU sequence data and direct optimization. The influence of alignment parameters on clade robustness has been explored, and many clades are found to have a low robustness. Nevertheless, based on clades with a high or moderately high robustness to increased gap costs, a few taxonomic changes are suggested: Crepidotaceae has been amended to include Crepidotus, Episphaeria, Simocybe, Pleuroflammula and Inocybe, the latter genus adding the homoplasious character mycorrhization to the family, Pellidiscus is included in Crepidotus, a position supported by micromorphology, two other genera formerly included in the family, Chromocyphella and Phaeosolenia, are excluded, and a new family, Chromocyphellaceae fam. nov., is erected for them based on fruit body shape, microcharacters, and sequences. Monophyly of Tubariaceae as recently circumscribed was not recovered, but tentatively we accept the genera Tubaria and Phaeomarasmius as members of the family. © The Willi Hennig Society 2009.