biostudies-literatureUnknown89Na QOnly three <i>Gerronema</i> (Porotheleaceae) species have been previously recorded in China. Here, we report collections of a fourth species in China: <i>G.nemorale</i> Har. Takah., which is widely distributed in Chinese temperate to subtropical zones. We also formally describe three new species, collected from Anhui, Fujian, and Zhejiang provinces: <i>G.baishanzuense</i> <b>sp. nov.</b>, <i>G.microcarpum</i> <b>sp. nov.</b>, and <i>G.zhujian</i> <b>sp. nov.</b> Furthermore, we include the results of a phylogenetic analysis of Porotheleaceae based on a multi-locus (ITS + nLSU) dataset. The results, which indicate that <i>Gerronema</i> is polyphyletic, support the taxonomic recognition of the three new species. Morphological descriptions, photographs, line drawings, and comparisons with closely related taxa are presented for the new and newly recorded species. A key to the seven species of <i>Gerronema</i> in China is also provided.MycoKeys87-120https://www.ebi.ac.uk/biostudies/studies/S-EPMC9849079biostudies-literatureUpdated taxonomy on <i>Gerronema</i> (Porotheleaceae, Agaricales) with three new taxa and one new record from China.PMC9849079Na QDing HHu YGe YZeng HCheng XSong ZfalseUpdated taxonomy on <i>Gerronema</i> (Porotheleaceae, Agaricales) with three new taxa and one new record from China.Only three <i>Gerronema</i> (Porotheleaceae) species have been previously recorded in China. Here, we report collections of a fourth species in China: <i>G.nemorale</i> Har. Takah., which is widely distributed in Chinese temperate to subtropical zones. We also formally describe three new species, collected from Anhui, Fujian, and Zhejiang provinces: <i>G.baishanzuense</i> <b>sp. nov.</b>, <i>G.microcarpum</i> <b>sp. nov.</b>, and <i>G.zhujian</i> <b>sp. nov.</b> Furthermore, we include the results of a phylogenetic analysis of Porotheleaceae based on a multi-locus (ITS + nLSU) dataset. The results, which indicate that <i>Gerronema</i> is polyphyletic, support the taxonomic recognition of the three new species. Morphological descriptions, photographs, line drawings, and comparisons with closely related taxa are presented for the new and newly recorded species. A key to the seven species of <i>Gerronema</i> in China is also provided.2022-01-01T00:00:00Z20222026-06-24T03:13:49.114Z2025-04-25T17:07:19.138ZS-EPMC98490793676082710.3897/mycokeys.89.79864