Two new species of Nectriaceae (Hypocreales, Sordariomycetes) from Yunnan, China

Nectriaceae is a highly diverse family, and members have a worldwide distribution, particularly in warm temperate to tropical regions. During the survey of fungal diversity in different habitats in Yunnan province, China, two new species isolated from soil and air respectively, namely <i>Atractiumyunnanense</i> <b>sp. nov.</b> and <i>Nalanthamalaxishuangbannaensis</i> <b>sp. nov.</b>, were proposed based on morphological comparisons and the multi-gene phylogenetic analyses of combined ITS, LSU, <i>rpb</i>2, and <i>tub</i>2 sequence data. Phylogenetically, both species clustered in a monophyletic clade within Nectriaceae with strong support. <i>A.yunnanense</i> is characterized by synnematous conidiophores, pale olivaceous-green, clavate to oblong-ellipsoidal, multi-septate conidia, and pale olivaceous-green chlamydospores. <i>N.xishuangbannaensis</i> has acremonium-like or penicillium-like conidiophores and either obovate or ellipsoidal, cylindrical or fusiform conidia. Full descriptions, illustrations, and a phylogenetic tree showing the phylogenetic position of the two new species were provided.