Dendrocorticiopsis luteoalba L. Wang & C. L. Zhao, 2025

Yang, Ali, Wang, Lu, Hu, Yongjun, Jiang, Yingtao, Shi, Guiying & Zhao, Changlin, 2025, Morphological characteristics and phylogenetic analyses revealed five new species (Basidiomycota) from Southwestern China, MycoKeys 114, pp. 177-212 : 177-212

Dendrocorticiopsis luteoalba L. Wang & C. L. Zhao sp. nov.

Figs 9 , 10 , 11

Typification.

China. Yunnan Province • Dehong, Yingjiang County, Tongbiguan Provincial Nature Reserve , GPS coordinates: 25°50′N, 97°36′E, altitude: 1000 m asl., on the fallen angiosperm branch, leg. C. L. Zhao, 19 July 2023, CLZhao 30380 ( SWFC!) .

Etymology.

Luteoalba (Lat.) refers to the new species having a white to buff hymenophore.

Basidiomata.

Annual, resupinate, closely adnate, membranaceous, without odor or taste when fresh, up to 6 cm long, 2 cm wide, and 300 μm thick. Hymenophore smooth, white (60) when fresh, white (60) to buff (4 A 4) upon drying. Sterile margin narrow, white (60) to buff (4 A 4), up to 1 mm.

Hyphal system.

Monomitic; generative hyphae with clamp connections, colorless, thin- to slightly thick-walled, smooth, branched, interwoven, usually with crystal masses, IKI –, CB –, 2.5–4 µm in diameter; tissues unchanged in KOH.

Hymenium.

Cystidia are of two types: (1) capitate, apically with resinous materials, gradually dissolving in KOH, colorless, thin-walled, smooth, 8.5–14 × 6.5–8.5 µm; (2) gloeocystidia, clavate to subulate, slightly flexuous, colorless, thin-walled, smooth, 68.5–90 × 8–10 µm. Dendrohyphidia numerous, thick-walled toward base, colorless, 16–19 × 2.5–3.5 µm. Basidia subclavate to clavate, flexuous, with a basal clamp connection and four sterigmata, 15.5–28.5 × 4–5.5 µm; basidioles numerous, in shape similar to basidia.

Spores.

Basidiospores ellipsoid, colorless, thin-walled, smooth, IKI –, CB –, (6.5 –) 7–8 × (4 –) 4.5–5.5 µm, L = 7.29 µm, W = 4.97 µm, Q = 1.47 (n = 30 / 1).

Figures

Figure 9. Basidiomata of Dendrocorticiopsis luteoalba (holotype CLZhao 30380). Scale bars: 1 cm (A); 1 mm (B).

Figure 10. Microscopic structures of Dendrocorticiopsis luteoalba (holotype CLZhao 30380): basidiospores (A); basidia and basidioles (B); dendrohyphidia (C); cystidia (D); gloeocystidia (E); a section of the hymenium (F). Scale bars: 10 µm (A – F).

Figure 11. Sections of hymenium of Dendrocorticiopsis luteoalba (holotype CLZhao 30380): basidiospores (A); basidia and basidioles (B); dendrohyphidia (C); gloeocystidia (D); cystidia (E); a section of generative hyphae (F). Scale bars: 10 µm (A – F); 10 × 100.