Henningsomyces bambusae S. Y. He, H. M. Zhou & C. L. Zhao, 2025

He, Siyuan, Wang, Lu, Shen, Kaize & Zhou, Hongmin, 2025, Morphological characteristics and phylogenetic analyses revealed four new species (Basidiomycota) in the Yunnan-Guizhou Plateau, China, MycoKeys 113, pp. 237-262 : 237-262

publication ID	https://doi.org/10.3897/mycokeys.113.140932
DOI	https://doi.org/10.5281/zenodo.14862310
persistent identifier	https://treatment.plazi.org/id/3AEA4B0B-29FF-5A1F-8345-48B96967D3DB
treatment provided by	MycoKeys by Pensoft
scientific name	Henningsomyces bambusae S. Y. He, H. M. Zhou & C. L. Zhao
status	sp. nov.

Treatment

Henningsomyces bambusae S. Y. He, H. M. Zhou & C. L. Zhao sp. nov.

Figs 6 View Figure 6 , 7 View Figure 7

Diagnosis.

Henningsomyces bambusae differs from H. candidus by its globose to subglobose and wider basidiospores (6.5–8.5 µm vs. 4–5 µm).

Holotype.

China • Yunnan Province, Zhaotong, Wumengshan National Nature Reserve , GPS coordinates 27°29'N, 103°55'E, evel. 1900 m asl., on dead bamboo, leg. C. L. Zhao, 18 September 2023, CLZhao 33088 ( SWFC). GoogleMaps

Etymology.

Bambusae (Lat.) refers to the host genus Bambusa.

Basidiomata.

Basidiomes forming loosely scattered colonies, short cylindric to tubular, sessile, up to 1–1.6 cm in length, 0.5–1 cm diam; external surface white (60) to cream (4 A 2 / 3), finely tomentose when dry; inner surface covered by a deeply concave, smooth hymenium.

Hyphal structure.

Monomitic, generative hyphae with clamp connections and simple septa, thin- to thick-walled, IKI –, CB –; tissues unchanged in KOH. External hyphae slightly contorted, widest at the base, slightly tapering towards the obtusely rounded apex, hyaline, thick-walled to solid, occasionally with simple septa, frequently unbranched, dextrinoid, CB –, 3–4 μm diam; tramal hyphae hyaline, thin-walled, with clamp connections, IKI –, 2.5–3 µm diam. Cystidia absent. Basidia cylindrical to subcylindrical, hyaline, thin-walled, with two sterigmata and a basal clamp connection, 19.5–22.5 × 7–8.5 µm; basidioles in shape similar to basidia, but slightly smaller.

Spores.

Basidiospores globose to subglobose, hyaline, thin-walled, smooth, with guttules, IKI –, CB –, 6.5–8.5 (– 9) × (6 –) 6.5–8.5 (– 9) µm, Lm = 7.61 µm, Wm = 7.45 µm, Q = 1.02–1.04 (n = 60 / 2).

Additional specimens examined

(paratypes). China • Yunnan Province, Zhaotong, Wumengshan National Nature Reserve , GPS coordinates 27°29'N, 103°55'E, evel. 1900 m asl., on a dead bamboo, leg. C. L. Zhao, 18 September 2023, CLZhao 33024; CLZhao 33085 ( SWFC) GoogleMaps .

Notes.

Based on the ITS analysis (Fig. 2 View Figure 2 ), the new taxon Henningsomyces bambusae grouped within the genus Henningsomyces and formed a sister group with H. candidus (Pers.) Kuntze. However , H. candidus can be delimited from H. bambusae by its narrower basidiospores (4–5 μm vs. 6–8 μm; Gilbertson and Blackwell 1985).