Efibula glossophora Z. R Gu & C. L. Zhao, 2025

Gu, Zirui, Zhou, Chunqin, Zhang, Jianling, Liu, Yu, Deng, Qiaohua, Yang, Rongcong, Yang, Shunqiang & Zhao, Changlin, 2025, Taxonomy and phylogeny of Irpicaceae and Meruliaceae (Polyporales, Basidiomycota) with descriptions of four new species from southwestern China, MycoKeys 119, pp. 197-234 : 197-234

Efibula glossophora Z. R Gu & C. L. Zhao sp. nov.

Figs 8 , 9 , 10

Diagnosis.

Differs from other Efibula species by its hard, membranous, slightly yellow to yellow basidiomata; a monomitic hyphal system with simple-septa generative hyphae; and ellipsoid basidiospores measuring 3.8–6 × 2.6–3.7 µm.

Holotype.

China • Yunnan Province, Dali, Weishan County, Leqiu Town, Zhongyao Village , GPS coordinates: 25°01'N, 100°4'E, altitude 1900 m asl., on the fallen angiosperm branch, leg. C. L. Zhao, 19 July 2022, CLZhao 22744, GenBank: ITS = PV 470540 , nLSU = PV 474185 ( SWFC).

Etymology.

Glossophora (Latin or Greek origin): refers to the smooth hymenial surface of the type specimen.

Description.

Basidiomata. Annual, resupinate, closely adnate, hard membranaceous, without odor or taste when fresh, up to 9 cm long, 2.5 cm wide, and 300 μm thick at center. Hymenophore smooth, buff to slightly yellow when fresh, slightly yellow to yellow upon drying. Sterile margin narrow, cream to slightly yellow, up to 1 mm.

Hyphal system. Monomitic; generative hyphae with simple septa, colorless, thin- to slightly thick-walled, smooth, rarely branched, interwoven, 3–3.5 µm in diameter, IKI –, CB –; tissues unchanged in KOH. Hymenium. Cystidia and cystidioles absent. Basidia long clavate, slightly flexuous, with four sterigmata and a simple septum at the base, 21.5–26.7 × 5.7–7.4 µm; basidioles numerous, in shape similar to basidia but smaller. Basidiospores. Basidiospores ellipsoid, colorless, thin-walled, smooth, IKI –, CB –, (3.6 –) 3.8–6 (– 7.5) × (2 –) 2.6–3.7 (– 4.3) µm, L = 5.3 µm, W = 3.3 µm, Q = 1.63 (n = 30 / 1).

Figures

Figure 8. Basidiomata of Efibula glossophora (holotype, CLZhao 22744). A. Basidiomata on the substrate; B. Macroscopic characteristics of hymenophore. Scale bars: 1 cm (A); 1 mm (B).

Figure 9. Sections of hymenium of Efibula glossophora (holotype, CLZhao 22744). A. Basidia and basidioles; B – E. Basidiospores; F, G. Part of the generative hyphae. Scale bars: 10 µm (A – G); 10 × 100 Oil.

Figure 10. Microscopic structures of Efibula glossophora (holotype, CLZhao 22744). A. Basidiospores; B. Basidia and basidioles; C. Part of the vertical section of hymenium. Scale bars: 5 µm (A); 10 µm (B, C).