Radulomyces fissuratus J. H. Dong & C. L. Zhao 2025, sp. nov.

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Main Authors: Dong, Junhong, Deng, Qiaohua, Chen, Minglan, Chen, Daxiang, Zhou, Chunqin, Zhao, Changlin
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Published: Zenodo 2025
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author Dong, Junhong
Deng, Qiaohua
Chen, Minglan
Chen, Daxiang
Zhou, Chunqin
Zhao, Changlin
author_facet Dong, Junhong
Deng, Qiaohua
Chen, Minglan
Chen, Daxiang
Zhou, Chunqin
Zhao, Changlin
contents <p><i>Radulomyces fissuratus</i> J. H. Dong & C. L. Zhao sp. nov.</p><p>Figs 5 C, 10, 11</p><p><b>Holotype.</b></p><p>China • Yunnan Province, Dehong, Yingjiang County, Tongbiguan Provincial Nature Reserve, GPS coordinates 23°48'N, 97°38'E, altitude 1000 m asl., on the fallen branch of angiosperm, leg. C. L. Zhao, 17 July 2023, CLZhao 29670 (SWFC).</p><p><b>Etymology.</b></p><p><i>fissuratus</i> (Lat.): referring to the cracked hymenial surface of the type specimen.</p><p><b>Basidiomata.</b></p><p>Annual, resupinate, adnate, membranaceous, without odour or taste, becoming hard coriaceous upon drying, up to 30 cm long, 2 cm wide, 50–150 µm thick. Hymenial surface tuberculate, cream when fresh, turning grey to grey-buff upon drying. Sterile margin cream, thinning out, up to 1 mm wide.</p><p><b>Hyphal system.</b></p><p>Monomitic, generative hyphae with clamp connections, colorless, thin-walled, branched, interwoven, 2–3.5 µm in diameter; IKI –, CB –, tissues unchanged in KOH.</p><p><b>Hymenium.</b></p><p>Cystidia and cystidioles absent. Basidia clavate to barrelled, with 4 sterigmata and a basal clamp connection, 21.5–32.5 × 8.5–10.5 µm; basidioles dominant, similar to basidia in shape, but slightly smaller.</p><p><b>Basidiospores.</b></p><p>Globose, slightly thick-walled, smooth, colorless, CB +, (6.5 –) 7–9 (– 9.5) × (6.2 –) 6.5–8.5 (– 8.8) µm, L = 8.07 µm, W = 7.76 µm, Q = 1.01–1.06, Q m = 1.04 ± 0.03 (n = 90 / 3).</p><p><b>Additional specimens (paratypes) examined.</b></p><p>China • Yunnan Province, Dehong, Yingjiang County, Tongbiguan Provincial Nature Reserve, GPS coordinates 23°48'N, 97°38'E, altitude 1000 m asl., on the fallen branch of angiosperm, leg. C. L. Zhao, 17 July 2023, CLZhao 29695; CLZhao 29713 (SWFC).</p>
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id zenodo_https___doi_org_10_5281_zenodo_14617582
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spellingShingle Radulomyces fissuratus J. H. Dong & C. L. Zhao 2025, sp. nov.
Dong, Junhong
Deng, Qiaohua
Chen, Minglan
Chen, Daxiang
Zhou, Chunqin
Zhao, Changlin
Biodiversity
Taxonomy
Fungi
Basidiomycota
Agaricomycetes
Russulales
Peniophoraceae
Radulomyces
Radulomyces fissuratus
<p><i>Radulomyces fissuratus</i> J. H. Dong & C. L. Zhao sp. nov.</p><p>Figs 5 C, 10, 11</p><p><b>Holotype.</b></p><p>China • Yunnan Province, Dehong, Yingjiang County, Tongbiguan Provincial Nature Reserve, GPS coordinates 23°48'N, 97°38'E, altitude 1000 m asl., on the fallen branch of angiosperm, leg. C. L. Zhao, 17 July 2023, CLZhao 29670 (SWFC).</p><p><b>Etymology.</b></p><p><i>fissuratus</i> (Lat.): referring to the cracked hymenial surface of the type specimen.</p><p><b>Basidiomata.</b></p><p>Annual, resupinate, adnate, membranaceous, without odour or taste, becoming hard coriaceous upon drying, up to 30 cm long, 2 cm wide, 50–150 µm thick. Hymenial surface tuberculate, cream when fresh, turning grey to grey-buff upon drying. Sterile margin cream, thinning out, up to 1 mm wide.</p><p><b>Hyphal system.</b></p><p>Monomitic, generative hyphae with clamp connections, colorless, thin-walled, branched, interwoven, 2–3.5 µm in diameter; IKI –, CB –, tissues unchanged in KOH.</p><p><b>Hymenium.</b></p><p>Cystidia and cystidioles absent. Basidia clavate to barrelled, with 4 sterigmata and a basal clamp connection, 21.5–32.5 × 8.5–10.5 µm; basidioles dominant, similar to basidia in shape, but slightly smaller.</p><p><b>Basidiospores.</b></p><p>Globose, slightly thick-walled, smooth, colorless, CB +, (6.5 –) 7–9 (– 9.5) × (6.2 –) 6.5–8.5 (– 8.8) µm, L = 8.07 µm, W = 7.76 µm, Q = 1.01–1.06, Q m = 1.04 ± 0.03 (n = 90 / 3).</p><p><b>Additional specimens (paratypes) examined.</b></p><p>China • Yunnan Province, Dehong, Yingjiang County, Tongbiguan Provincial Nature Reserve, GPS coordinates 23°48'N, 97°38'E, altitude 1000 m asl., on the fallen branch of angiosperm, leg. C. L. Zhao, 17 July 2023, CLZhao 29695; CLZhao 29713 (SWFC).</p>
title Radulomyces fissuratus J. H. Dong & C. L. Zhao 2025, sp. nov.
topic Biodiversity
Taxonomy
Fungi
Basidiomycota
Agaricomycetes
Russulales
Peniophoraceae
Radulomyces
Radulomyces fissuratus
url https://doi.org/10.5281/zenodo.14617582