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Gerronema baishanzuense Q. Na, H. Zeng & Y.P. Ge, Gerronema microcarpum Q. Na, H. Zeng & Y.P. Ge, in Na, Hu, Zeng, Song, Ding, Cheng & Ge, 2022. |
Abstract
Only three Gerronema (Porotheleaceae) species have been previously recorded in China. Here, we report collections of a fourth species in China: G. nemorale 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: G. baishanzuense sp. nov., G. microcarpum sp. nov., and G. zhujian sp. nov. Furthermore, we include the results of a phylogenetic analysis of Porotheleaceae based on a multi-locus (ITS + nLSU) dataset. The results, which indicate that Gerronema 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 Gerronema in China is also provided.
Keywords: new taxon, polygenes, taxonomy, white-spored
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| Fresh basidiomata of Gerronema baishanzuense Q. Na, H. Zeng & Y.P. Ge a–e FFAAS0359 (Holotype) f–g FFAAS0360 h–i FFAAS0361 j–k FFAAS0362 l–m FFAAS0363 n–o FFAAS0366. Scale bars: 10 mm (a–o). Photographs a–e by Qin Na; f–g by Junqing Yan h–i by Liangliang Qi j–o by Yupeng Ge. |
Gerronema baishanzuense Q. Na, H. Zeng & Y.P. Ge, sp. nov.
Diagnosis: Pileus dark brown at center, covered with dark brown fibrillose or pubescent. Stipe densely pruinose when young. Cheilocystidia present. Pileus trama with visible dark brown hyphae and coarse excrescences.
Etymology: Refers to the type locality.
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| Fresh basidiomata of Gerronema microcarpum Q. Na, H. Zeng & Y.P. Ge. a FFAAS0365 b FFAAS0372 c–d FFAAS0375 e FFAAS0373 (Holotype) f–g FFAAS0374 h–i FFAAS0371. Scale bars: 10 mm (a–i). Photographs a, e–i by Yupeng Ge; b by Junqing Yan; c–d by Qin Na. |
Gerronema microcarpum Q. Na, H. Zeng & Y.P. Ge, sp. nov.
Diagnosis: Basidiomata distinctly small. A pileus a bit slimy when moist. Stipe light yellow, base turning to light brown with age. Cheilocystidia common in clavate with rounded apex, rarely fusiform. Pileipellis occasionally with coarse excrescences.
Etymology: Refers to the small basidiomata.
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| Fresh basidiomata of Gerronema zhujian Q. Na, H. Zeng & Y.P. Ge. a–b FFAAS0364 c–d FFAAS0376 (Holotype) e–f FFAAS0370. Scale bars: 10 mm (a–f). Photographs a–b, e–f by Liangliang Qi c–d by Junqing Yan. |
Gerronema zhujian Q. Na, H. Zeng & Y.P. Ge, sp. nov.
Diagnosis: Pileus fuscous and densely covered with tiny, deep brown fur or scales, distinctly radially striped with darkened lines. Stipe white, upper part slight brown when old. Cheilocystidia present. Pileipellis without coarse excrescences.
Etymology: The name refers to the centrally depressed, umbilicate basidiocarps, which resemble an eye or a loudspeaker; zhujian is a mythical one-eyed Chinese creature who is usually very noisy, like a walking loudspeaker.
Qin Na, Yaping Hu, Hui Zeng, Zhizhong Song, Hui Ding, Xianhao Cheng and Yupeng Ge. 2022. Updated Taxonomy on Gerronema (Porotheleaceae, Agaricales) with Three New Taxa and One New Record from China. MycoKeys. 89: 87-120. DOI: 10.3897/mycokeys.89.79864