Trechispora daweishanensis C.L. Zhao, 2021

Zong, Tong-Kai, Liu, Chao-Mao, Wu, Jian-Rong & Zhao, Chang-Lin, 2021, Trechispora daweishanensis and T. xantha spp. nov. (Hydnodontaceae, Trechisporales) found in Yunnan Province of China, Phytotaxa 479 (2), pp. 147-159 : 153-155

Trechispora daweishanensis C.L. Zhao , sp. nov. Figs. 3 , 4

MycoBank no.: MB 838158

Holotype:— CHINA. Yunnan Province, Honghe, Pingbian County, Daweishan National Nature Reserve , E 103°30′10′′, N 23°42′07′′, alt. 1500 m, on fallen branch of angiosperm, 1 August 2019, CLZhao 17860 ( SWFC!), GenBank No. (ITS MW 302337 ; nLSU MW 293866 ).

Etymology:— daweishanensis (Lat.) : refers to the locality (Daweishan) of the type specimen.

Description:— Basidiomata annual, adnate, resupinate, without odor or taste when fresh, becoming membranous upon drying, up to 8 cm long, 2.5 cm wide, 30–70 µm thick. Hymenial surface tuberculate, white when fresh, turn to white (60) to cream (21:4A2/3) to buff (13:4A4) upon drying. Subiculum very thin, white. Margin sterile, white (60), 0.3 cm wide.

Hyphal system monomitic; generative hyphae with clamp connections, IKI–, CB –; tissues unchanged in KOH.

Subiculum composed of colorless, thin-walled long, generative hyphae rarely branched, 1–2.5 μm in diam., ampullate hyphae encrusted with numerous larger crystals.

Subhymenium composed of colorless, thin-walled, shorter generative hyphae rarely branched, 1.5–3.5 μm in diam., many crystals present; cystidia and cystidoles absent; basidia subcylindric to shortly clavate, 9.5–14.5 × 4–7 µm, four-spored and with a basal clamp connection; basidioles dominant, in shape similar to basidia, but slightly smaller.

Basidiospores ellipsoid, colorless, thin-walled, smooth, with oil drops, IKI–, CB –, (3.5–)3.8–5(–5.2) × (2.5–)2.7– 3.5(–3.7) µm, L = 4.46 µm, W = 3.10 µm, Q = 1.41–1.44 (n = 60/2).

Additional specimen (paratype) examined:— CHINA. Yunnan Province, Honghe, Pingbian County, Daweishan National Nature Reserve , E 103°30′10′′, N 23°42′07′′, alt. 1500 m, on fallen angiosperm branch, 2 August 2019, CLZhao 18255 ( SWFC!) , GenBank No. (ITS MW 302338 ; nLSU MW 293867 ) .

Figures

FIGURE 3. Basidiomata of Trechispora daweishanensis. Bars: A = 0.5 cm, B = 0.5 mm (holotype). Photos by: Tong-Kai Zong.

FIGURE 4. Microscopic structures of Trechispora daweishanensis (drawn from the holotype).A:Basidiospores.B: Basidia and basidioles. C: A section of hymenium. Bars:A = 5 µm, B–C = 10 µm. Drawings by: Tong-Kai Zong.