Trechispora thailandica S.L. Liu, S.H. He & L.W. Zhou
MycoBank number: MB 559903; Index Fungorum number: IF 559903; Facesoffungi number: FoF 12883;
Description
Basidiomes annual, resupinate, effused, thin, soft, easily separated from substrates, up to 9 cm long, 3 cm wide. Hymenophore grandinioid with round and obtuse aculei, white to cream when fresh, cream to buff-yellow with age, finely cracked with age. Margin thinning out as byssoid. Hyphal system monomitic; generative hyphae with clamp connections. Subicular hyphae hyaline, thin-walled, frequently branched and septate, subparallel, 2.5–5 µm in diam. Tramal generative hyphae distinct, hyaline, thin-walled, moderately branched, smooth, interwoven, 3–5 μm in diam. Cystidia absent. Crystals usually present, bipyramidic, aggregated. Basidia cylindrical with a slight median constriction, hyaline, thin-walled, with four sterigmata and a basal clamp connection, 11–15 × 4–5.5 µm; basidioles in shape similar to basidia, but slightly smaller. Basidiospores ellipsoid, hyaline to yellowish, thin-walled, aculeate, inamyloid, indextrinoid, acyanophilous, (3.5–)3.8–4.3(–4.5) × (2.5–)2.8–3.5 µm, L = 4 µm, W = 3 µm, Q = 1.3 (n = 60/2).
Material examined: THAILAND, Chiang Mai, Doi Saket, on rotten bamboo, 24 July 2016, S.H. He, He 4101 (holotype in BJFC 023542).
Distribution: THAILAND
Notes: Trechispora thailandica resembles T. cyatheae by the white to cream, grandinioid hymenophore and ellipsoid basidiospores; however, T. cyatheae has smaller basidiospores (3–3.5 × 2–3 µm including spines) and grows exclusively on Cyathea glauca, an endemic species of tree fern to La Réunion, France (Ordynets et al. 2015).
![Picture1](https://www.facesoffungi.org/wp-content/uploads/2022/09/Picture1-61-761x1024.jpg)
Fig. 1. Basidiomes of Trechispora thailandica (He 4101, holotype). — Scale bars: a = 1 cm; b = 0.5 mm.
![Picture2](https://www.facesoffungi.org/wp-content/uploads/2022/09/Picture2-40-1024x858.jpg)
Fig. 2. Microscopic structures of Trechispora thailandica (drawn from the holotype). a. Vertical section through basidiomes showing position of b; b. Section through apex of a spine; c. Basidia; d. Basidiospores. — Scale bar = 10 μm.