Summary: | During the investigation of lignicolous freshwater fungi in plateau lakes in Yunnan Province, China, eight Lentitheciaceae species were collected from five lakes viz. Luguhu, Qiluhu, Xingyunhu, Cibihu, and Xihu lake. Based on morphological characters and phylogenetic analysis of combined ITS, LSU, SSU, and <i>tef 1-α</i> sequence data, a new genus <i>Paralentithecium</i>, two new species (<i>Paralentithecium suae</i>, and <i>Setoseptoria suae</i>), three new records (<i>Halobyssothecium phragmitis</i>, <i>H. unicellulare,</i> and <i>Lentithecium yunnanensis</i>) and three known species viz. <i>Halobyssothecium aquifusiforme</i>, <i>Lentithecium pseudoclioninum,</i> and <i>Setoseptoria bambusae</i> are reported.
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