Tomentella yunnanensis X. J. Zhang & C. L. Zhao, 2024

Zhang, Xiaojie, Shi, Fulei, Yang, Ke & Zhao, Changlin, 2024, The diversity and taxonomy of Tomentella (Thelephoraceae, Thelephorales) with descriptions of four new species from Southwestern China, MycoKeys 109, pp. 1-29 : 1-29

Tomentella yunnanensis X. J. Zhang & C. L. Zhao sp. nov.

Figs 9 , 10

Holotype.

China • Yunnan Province, Zhaotong, Wumengshan National Nature Reserve , 27 ° 33 ' N, 103 ° 72 ' E, altitude 2300 m, on the fallen branch of angiosperm, leg. C. L. Zhao, 28 August 2023, CLZhao 32532 ( SWFC).

Etymology.

Yunnanensis (Lat.): refers to the type locality “ Yunnan Province ”.

Description.

Basidiomata annual, resupinate, arachnoid, without odour or taste when fresh, up to 10 cm long, 3 cm wide, 0.2–0.3 mm thick. Hymenial surface smooth, slightly buff when fresh, buff to cinnamon buff when dry. Sterile margin narrow, cream to slightly buff, up to 1 mm.

Hyphal system: Monomitic; generative hyphae with clamp connections, pale brown, slightly thick-walled, branched, interwoven, 4–5 µm in diameter, IKI –, CB –; brown-black to black in KOH.

Hymenium: Cystidia and cystidioles absent. Basidia cylindrical to subclavate, with 4 sterigmata and a basal clamp connection, 46–57 × 7–9.5 µm; basidioles slightly smaller than basidia.

Spores: Basidiospores subglobose to globose, nodulose to verrucose, yellowish-brown, thick-walled, IKI –, CB –, 7–8.5 (– 9) × 5–8 µm, L = 8.13 µm, W = 6.72 µm, Q = 1.21 (n = 30 / 1).

Figures

Figure 9. Tomentella yunnanensis (holotype, CLZhao 32532): basidiomata on the substrate (A), macroscopic characteristics of hymenophore (B). Scale bars: 1 cm (A); 1 mm (B).

Figure 10. Microscopic structures of Tomentella yunnanensis (holotype, CLZhao 32532): basidiospores (A), basidia and basidioles (B), a section of the hymenium (C). Scale bars: 10 µm (A – C).