Vararia lincangensis Y.L. Deng & C.L. Zhao, 2024

Deng, Yinglian, Jabeen, Sana & Zhao, Changlin, 2024, Species diversity and taxonomy of Vararia (Russulales, Basidiomycota) with descriptions of six species from Southwestern China, MycoKeys 103, pp. 97-128 : 97

Vararia lincangensis Y.L. Deng & C.L. Zhao sp. nov.

Figs 7 , 8

Holotype.

China. Yunnan Province, Lincang, Fengqing County, Yaojie Township, Xingyuan Village, 24°61'44"N, 100°17'21"E, altitude 1660 m a.s.l., on the fallen angiosperm branch, leg. C.L. Zhao, 20 July 2022, CLZhao 22791 (SWFC).

Etymology.

Lincangensis (Lat.): referring to the locality (Lincang) of the type specimen.

Description.

Basidiomata annual, resupinate, membranous, soft and adnate, without odor or taste when fresh, up to 90 mm long, 20 mm wide, and 70-150 µm thick. Hymenial surface smooth, white to cream when fresh, cream upon drying, cracking with age. Sterile margin distinct, narrow, whitish, attached, and up to 1 mm wide.

Hyphal system dimitic, generative hyphae bearing simple-septa, rarely branched, colorless, thin-walled, 2-3 μm in diameter, IKI-, CB-, tissues unchanged in KOH; subhymenial hyphae densely covered by some crystals. Dichohyphae predominate, white to cream, capillary, thick-walled, frequently branched, dichotomously to irregularly branched with main branches and acute tips, 1-1.5 µm diameter, weakly to moderately dextrinoid in Melzer’s reagent, CB-, tissues unchanged in KOH, subiculum composed of colorless. Skeletal hyphae colorless, thick-walled, 2-3 µm in diameter, IKI-, CB-, tissues unchanged in KOH.

Gloeocystidia subglobose, and clavate to fusiform, usually containing refractive materials, colorless, smooth, thin-walled, 6.5-16 × 3-5 µm. Basidia clavate, with four sterigmata and a basal simple septum, thin-walled, smooth, 11-17.5 × 2-4 μm; basidioles in shape similar to basidia, but slightly smaller.

Basidiospores ellipsoid, colorless, thin-walled, smooth, occasionally acyanophilous, CB-, (3-)3.5-5.5(-6) × (2-)2.5-4 µm, L = 4.18 µm, W = 3.11 µm, Q = 1.33-1.36 (n = 60/2).

Additional specimen examined

(paratype). China. Yunnan Province, Lincang, Fengqing County, Yaojie Township, Xingyuan Village, 24°61'44"N, 100°17'21"E, altitude 1660 m a.s.l., on the fallen angiosperm branch, leg. C.L. Zhao, 20 July 2022, CLZhao 22799 (SWFC).

Figures

Figure 7. Basidiomata of Vararia lincangensis (holotype). Scale bars: 1 cm (A); 1 mm (B).

Figure 8. Microscopic structures of Vararia lincangensis (holotype) A basidiospores B basidioles C basidia D gloeocystidia E dichohyphae F a section of hymenium. Scale bars: 10 µm (A-F).