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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.

Rhytidhysteron (Hysteriaceae) species are widely distributed as saprobes or weak pathogens on a wide range of woody plants. In this study, several Rhytidhysteron collections were made in northern Thailand and multi-gene phylogenetic analyses were used to resolve the phylogenetic boundaries of species. Two novel species, R. thailandicum and R. neorufulum are introduced, based on morphological traits and multi-gene phylogeny. The genus is revised with a key to species. Fil: Thambugala, Kasun M.. Guizhou Academy of Agricultural Sciences; China. Center of Excellence in Fungal Research; Tailandia. Mae Fah Luang University; Tailandia Fil: Hyde, Kevin D.. Center of Excellence in Fungal Research; Tailandia. Mae Fah Luang University; Tailandia. Chinese Academy of Science. Kunming Institute of Botany; China Fil: Eungwanichayapant, Prapassorn D.. Mae Fah Luang University; China Fil: Romero, Andrea Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Micología y Botánica. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Micología y Botánica; Argentina Fil: Liu, Zuo-Yi. Guizhou Academy Of Agricultural Sciences; China

Aquapteridospora lignicola gen. et sp. nov. was found on wood submerged in a freshwater stream in Chiang Rai Province, Thailand. Phylogenetic analysis of LSU sequence data placed the isolate in Diaporthomycetidae, genera incertae sedis. Aquapteridospora is a hyphomycete with polyblastic conidiogenous cells with several sympodial proliferations, bearing tiny, protuberant, circular scars and fusiform conidia, with pale to dark brown central cells and subhyaline end cells, sometimes with a conspicuous sheath. Aquapteridospora is compared to Pleurophragmium and Minimelanolocus which share some similar characters. A new genus and species is introduced to accommodate this new lineage with notes on its taxonomy and phylogeny.

— A new taxon of Botryosphaeriaceae associated with Arrhenatherum and Dactylis was collected in Italy. Single ascospore isolates were obtained and formed asexual morphs in culture. Multi-gene phylogenetic analysis was carried out using ITS, LSU nrDNA and EF1-α sequence data and the resulting phylogenetic tree showed that new species clustered in Botryosphaeriaceae together with Tiarosporella species with high bootstrap support. The new species is introduced as a sexual morph of Tiarosporella and detailed descriptions and illustrations are provided. A discussion of the asexual morphs of Tiarosporella is provided.

Twenty-two strains of Colletotrichum, representing eight species, were isolated from eight genera of Orchidaceae in Yunnan and Guizhou provinces in China. Fourteen strains were from lesions and are pathogens, four were from fallen/dead flowers or stems and four were isolated as endophytes. The strains are characterized through morphological studies and multilocus phylogenetic analysis (ACT, Tub 2, CAL, CHS I, GPDH and ITS). Colletotrichum orchidearum and the new species Colletotrichum karstii are described and illustrated, based on morphological characters and multilocus sequence data. Collections of the other Colletotrichum species are reported with notes.