Two new species of Pseudocosmospora (Hypocreales) revealed through morphological and phylogenetic analyses

<i>Pseudocosmospora</i> species typically occur on stromata of diatrypaceous and xylariaceous fungi and are mainly distributed in tropical and temperate areas. Some of them play important roles in biomedicine and agriculture due to their production of bioactive secondary metabolites. In this study, <i>Pseudocosmospora chlamydospora</i> <b>sp. nov</b>. and <i>P. chloroxantha</i> <b>sp. nov</b>. from Beijing, China are described based on morphological features and phylogenetic analyses of combined ITS, LSU, <i>tub2</i>, <i>rpb1</i> and <i>tef1-α</i> sequences. Detailed descriptions and illustrations of the novel taxa are provided, and their distinctions from close relatives are discussed.