Trechispora damansaraensis S.L. Liu, L.W. Zhou & S.H. He.

MycoBank number: MB 559888; Index Fungorum number: IF 559888; Facesoffungi number: FoF 12867;


Basidiomes annual, resupinate, effused, thin, soft and fragile, loosely attached to the substrates. Hymenophore smooth, farinaceous, cream when fresh, straw-yellow to cinnamon-buff, occasionally cracked with age. Margin thinning out, fimbriate, slightly paler than hymenophore, becoming indistinct with age. Mycelial cords present, white, 0.5 mm wide. Hyphal system monomitic; generative hyphae with clamp connections. Subicular hyphae hyaline, thin to slightly thick-walled, frequently branched and septate, interwoven, 1–4 µm in diam, ampullate septa up to 5 μm wide, thin, flexuous. Subhymenium composed of indistinct generative hyphae, 2–4 µm in diam, much branched, flexuous. Cystidia absent. Crystals occasionally present, as aggregated rhomboidal flakes. Basidia cylindrical with a slight median constriction, thin-walled, with four sterigmata and a basal clamp connection, 9–12 × 5–6.5 µm; basidioles in shape similar to basidia, but slightly smaller. Basidiospores ellipsoid, hyaline, thin to slightly thick-walled, aculeate, inamyloid, indextrinoid, acyanophilous, (2.8–)3–3.8 × (2.1–)2.3–3(–3.2) µm, L = 3.2 µm, W = 2.7 µm, Q = 1.2 (n = 60/2).

Material examined: MALAYSIA, Selangor, Kota Damansara Community Forest Reserve, on fallen angiosperm branch, 17 Apr. 2018, L.W. Zhou, LWZ 20180417-26 (holotype in HMAS).

Distribution: MALAYSIA

Notes: Trechispora minima mostly resembles T. damansaraensis by smooth hymenophore, a monomitic hyphal system and occasional presence of crystals in subiculum, but differs in white hymenophore, parallel generative hyphae in subiculum, narrower basidia (4.5–5 µm in width) and subglobose to broadly ellipsoid basidiospores (Larsson 1996).

Fig. 1. Basidiomes of Trechispora damansaraensis (LWZ 20180417-26, holotype). — Scale bars: a = 1 cm; b = 1 mm.

Fig. 2. Microscopic structures of Trechispora damansaraensis (drawn from the holotype). a. Vertical section of basidiomes; b. Hyphae in subiculum; c. Basidia; d. Basidiospores. — Scale bar = 10 μm.