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| (a–c) Gymnopus flavoalbus ((a,b) Holotype, KUN-HKAS144470, (c) KUN-HKAS144471); (d–f) G. sinobrevipes ((d,e) Holotype, KUN-HKAS108042, (f) KUN-HKAS108101); (g–i) G. yunnanensis ((g,h): Holotype, KUN-HKAS108570, (i) KUN-HKAS108610). W.C. Feng, Y.Y. Cui and Q. Cai, in Feng, Li, Cui et Cai. 2025. Bars = 2 cm. |
Abstract
Species of Gymnopus sect. Levipedes are challenging to delimitate due to the morphological similarity among different taxa. In this study, morphological characteristics, molecular phylogenetic data, and ecological traits were integrated to investigate the species diversity of this section of southwestern China. A total of 17 species were documented in the region, including three new species, namely G. sinobrevipes, G. flavoalbus, G. yunnanensis, and two species new to the studied area—G. bicolor and G. ocior. Detailed descriptions and illustrations of the three new species are presented, along with comparisons to closely related or morphologically similar species. The remaining species included five that were originally described from southwestern China, four that were first identified from Europe, two from the Republic of Korea, and one from North America. Six of these species, originally described outside of China, currently lack molecular evidence to support their distributions in southwestern China. Finally, 11 species with morphological and molecular evidence were recognized in southwestern China. A key to these species is also provided.
Keywords: Agaricales; Omphalotaceae; phylogeny; morphology; three new taxa; taxonomy
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| Basidiomata of novel species in Gymnopus sect. Levipedes from southwestern China. (a–c) G. flavoalbus ((a,b) Holotype, KUN-HKAS144470, (c) KUN-HKAS144471); (d–f) G. sinobrevipes ((d,e) Holotype, KUN-HKAS108042, (f) KUN-HKAS108101); (g–i) G. yunnanensis ((g,h): Holotype, KUN-HKAS108570, (i) KUN-HKAS108610). Bars = 2 cm. |
Gymnopus flavoalbus W.C. Feng, Y.Y. Cui and Q. Cai, sp. nov.
Etymology: Referring to the pale yellow center and whitish margin of the pileus.
Diagnosis: Similar to G. macropus Halling, but differs by its light-colored pileus, furcate cheilocystidia, and pileipellis with broadly clavate to spherical terminal cells without pigments.
Gymnopus sinobrevipes W.C. Feng, Y.Y. Cui and Q. Cai, sp. nov.
Etymology: Referring to the species from China and having short stipe.
Diagnosis: Similar to G. tiliicola J.J. Hu, B. Zhang, and Yu Li, but differs in its smaller pileus and cheilocystidia with knobs.
Gymnopus yunnanensis W.C. Feng, Y.Y. Cui and Q. Cai, sp. nov.
Etymology: Referring to the locality, Yunnan Province, China, where the holotype was collected.
Diagnosis: Similar to G. dryophiloides, but differs in its oblong to subcylindrical basidiospores and the absence of rhizomorphs at the stipe base.
Wei-Chao Feng, Xiao-Yan Li, Yang-Yang Cui and Qing Cai. 2025. Species Diversity of Gymnopus Section Levipedes in Southwestern China, with a Description of Three New Species. J. Fungi. 11(2), 88; DOI: doi.org/10.3390/jof11020088 [23 January 2025]
