biostudies-literatureUnknown90Wang SN<i>Iugisporipsathyra</i>, a new psathyrelloid genus from tropical red soil of China, is established with <i>I.reticulopilea</i> as the type species. The new genus is characterised by basidiomata psathyrelloid, pileus rugose to appearing reticulate ridged, covered by persistent, but inconspicuous villus, pleurocystidia absent and ridge-ornamented spores with an obvious suprahilar plage. The genus is unique amongst Psathyrellaceae in producing ridge-ornamented spores with an obvious suprahilar plage and forms a distinct lineage within Psathyrellaceae, based on the Maximum Likelihood and Bayesian Inference analyses of a combined three-gene sequence dataset (ITS, LSU and β-<i>tub</i>). Full descriptions and photographs of the new genus and species are presented.MycoKeys147-162https://www.ebi.ac.uk/biostudies/studies/S-EPMC9849077biostudies-literature<i>Iugisporipsathyrareticulopilea</i> gen. et sp. nov. (Agaricales, Psathyrellaceae) from tropical China produces unique ridge-ornamented spores with an obvious suprahilar plage.PMC9849077Fan YGWang SNYan JQfalse<i>Iugisporipsathyrareticulopilea</i> gen. et sp. nov. (Agaricales, Psathyrellaceae) from tropical China produces unique ridge-ornamented spores with an obvious suprahilar plage.<i>Iugisporipsathyra</i>, a new psathyrelloid genus from tropical red soil of China, is established with <i>I.reticulopilea</i> as the type species. The new genus is characterised by basidiomata psathyrelloid, pileus rugose to appearing reticulate ridged, covered by persistent, but inconspicuous villus, pleurocystidia absent and ridge-ornamented spores with an obvious suprahilar plage. The genus is unique amongst Psathyrellaceae in producing ridge-ornamented spores with an obvious suprahilar plage and forms a distinct lineage within Psathyrellaceae, based on the Maximum Likelihood and Bayesian Inference analyses of a combined three-gene sequence dataset (ITS, LSU and β-<i>tub</i>). Full descriptions and photographs of the new genus and species are presented.2022-01-01T00:00:00Z20222026-04-08T12:26:07.133Z2025-04-25T17:06:20.097ZS-EPMC98490773676042410.3897/mycokeys.90.85690