Catalogue of fungi in China 5. Preliminary survey of macrofungi in Medog, Southwest China

The unique ecological environment and minimal human interference in Medog County endow it with abundant and distinctive macrofungi resources. But in the past, there have been few research reports on the investigation of macrofungi in Medog County. In this study, we systematically investigated macrofungi in forests of different altitudinal gradients in Medog County and collected some specimens, especially those growing on wood. Morphology and phylogenetic analysis were used to study the specimens which could not be identified as species. Phylogenetic analysis was based on DNA sequences including the internal transcribed spacer regions (ITS) and the large subunit of nuclear ribosomal RNA gene (nLSU). Based on morphological characterisation and molecular data, this study identified 192 macrofungi species in the Basidiomycota and Ascomycota from Medog County, belonging to 15 orders, 62 families, and 123 genera. Among these species, 12 new species belong to eight genera, four families within Marasmiineae were recognised, viz. <i>Collybiopsis incarnatus</i>, <i>C. medogensis</i>, <i>C. salmonea</i>, <i>C. submenehune</i>, <i>Crustomyces subisabellinus</i>, <i>Gymnopus subfoetidus</i>, <i>Marasmiellus medogensis</i>, <i>M. subgregarius</i>, <i>Marasmius medogensis</i>, <i>Mycetinis rhododendri</i>, <i>Oudemansiella nivea</i>, and <i>Pusillomyces tropicalis</i>. Basidiomata and microscopic structure diagrams and detailed morphological descriptions of the novel species are provided.