Perenniporiopsis gen. nov. is described to accommodate Perenniporiopsis minutissima spec. et comb. nov. Phylogenetic analyses based on two data sets, [ITS n28S nrRNA] and [ITS, n28S, mtSSU, tef1], and using Maximum Parsimony, Maximum Likelihood and Bayesian inferences, showed that specimens of Perenniporia minutissima form a monophyletic well-supported clade within the core polyporoid clade, The new genus grouped with the Abundisporus, Perenniporiella and Perenniporia s.s. lineages, and is phylogenetically distinct from the Perenniporia s.s. lineage (100% BS, 99% MP, 1.00 BPP). Morphologically, the consistency of the basidiocarps, waxy when fresh, drying rigidly osseous, as well as the large basidiospores characterize this species and distinguish it from Perenniporia s.s. The species seems to be endemic to temperate east Asia, and is known from temperate Japan and China.

Four Beltrania-like taxa, viz., Beltrania rhombica, Beltraniella fertilis, Beltraniopsis longiconidiophora sp. nov. and Hemibeltrania cinnamomi were identified during a survey of hyphomycetes in Thailand. Each species is provided with a description and a molecular analysis. The new species is introduced based on morphological and molecular differences and compared with similar taxa. Beltraniella fertilis and H. cinnamomi are new records for Thailand.

This paper introduces a new genus Delonicicola, to accommodate D. siamense sp. nov., which was found associated with Delonix regia seed pods, collected in Chiang Rai Province, Thailand. ITS sequence data confirmed a close relationship of Delonicicola with Liberomyces and Asteromella in Xylariomycetidae. Phylogenetic and molecular clock analyses of combined LSU, SSU and RPB2 sequence data provide evidence for a new family Delonicicolaceae and a new order Delonicicolales in Xylariomycetidae. Members of Delonicicolaceae are saprobes, endophytes or pathogens of angiosperms and it is characterized by pseudostromatal immersed, papillate ascomata, short pedicellate asci with a simple apex and 1-septate, hyaline ascospores. The asexual morph is coelomycetous with pycnidial conidiomata and allantoid, filiform or bacilloid, hyaline conidia.

A hyphomycetous fungus producing dark muriform conidia, was isolated as endophyte from trunk of Aquilaria crassna in Laos. The fungus was compared to morphologically similar genera, such as Annellophorella, Berkleasmium, Canalisporium, and Monodictys. Morphological evidence, however, excluded the fungal taxon from any of these genera. Phylogenetic analysis of combined small subunit, 5.8S, and large subunit ribosomal DNA sequence data placed the fungus within the order Savoryellales (Sordariomycetes, Hypocreomycetidae), but on a distinct terminal clade along with other groups of the order. Based on morphological and molecular phylogenetic evidence, we therefore established the genus Dematipyriforma to accommodate the taxon, which was named Dematipyriforma aquilaria.

In this new series of Fungal Biodiversity Profiles, the authors describe ten Basidiomycetes, one recombination and nine taxa new to science, using both morphological and molecular data. Descriptions are provided for Craterellus parvogriseus sp. nov. (Cantharellales); for Lactifluus maenanensis sp. nov., Russula albidogrisea sp. nov., R. aureorubra sp. nov., R. aureoviridis sp. nov., R. obscuricolor sp. nov. and R. pauriensis sp. nov. (Russulales), for Xerocomus reticulostipitatus sp. nov. (Boletales) and for Leucocybe houghtonii comb. nov. and Amanita rajendrae sp. nov. (Agaricales).