Tomentella gloeocystidiata H.S. Yuan & Y.C. Dai 2020
Index Fungorum number: IF555700; Facesoffungi number: FoF 05625
Holotype: CHINA, Liaoning Province, Qingyuan County, Experimental Station of Forest Ecology, on rotten angiosperm wood debris, 3 August 2016, Yuan 11171 (IFP 019289, holotype), Yuan 11200 (IFP 019290).
Morphological description
Basidiocarps annual, resupinate, separable from the substrate, arachnoid, without odour or taste when fresh, 0.1–0.2 mm thick, continuous. Hymenophoral surface smooth, olive yellow to olive (3D6–3E8) and concolorous with subiculum when dry. Sterile margin often indeterminate, byssoid, concolorous with hymenophore. Rhizomorphs present in subiculum, 20–35 μm diam; rhizomorphic surface more or less smooth; hyphae in rhizomorphs monomitic, undifferentiated, of type B, compactly arranged and of uniform; single hyphae clamped, slightly thick-walled, unbranched, 2–3 μm diam, yolk yellow in KOH, cyanophilous, inamyloid. Subicular hyphae monomitic; generative hyphae clamped, slightly thick-walled, occasionally branched, 3–5 μm diam, without encrustation, yolk yellow in KOH, cyanophilous, inamyloid. Subhymenial hyphae clamped, thin- to slightly thick-walled, occasionally branched, 4–5.5 μm diam; hyphal cells more or less uniform, yolk yellow in KOH, acyanophilous, inamyloid. Gloeocystidia present, arising from subhymenial or subicular hyphae, 60–80 μm long, 4–5.5 μm diam at base and 7–10 μm diam at apex, capitate, embedded, aseptate, occasionally encrusted on stalk, yolk yellow in KOH. Basidia 40–60 μm long and 5–8 μm diam at apex, 5–8 μm at base, with a clamp connection at base, clavate, not stalked, not sinuous, rarely with transverse septa, Chinese yellow in KOH, yellow in distilled water, 4-sterigmate; sterigmata 2–4 μm long and 1–2 μm diam at base. Basidiospores thick-walled, (6.5–)7–8(–8.5) × (6–)6.3–7.6(–8) μm, L = 7.59 μm, W = 6.96 μm, Q = 1.07–1.13 (n = 60/2), irregularly globose or lobed in frontal and lateral views, aculeate, Chinese yellow in KOH, Chinese yellow in distilled water, cyanophilous, inamyloid; echinuli usually isolated, sometimes grouped in 2 or more, up to 2.5 μm long.
Habitat: On rotten angiosperm wood debris.
Distribution: In China.
GenBank Accession: ITS: KY686220, KY686221; LSU: MK446376, MK446377.
Notes: Tomentella capitata is similar to T. gloeocystidiata by having continuous basidiocarps separable from the substrate, the presence of rhizomorphs, thick-walled subicular hyphae, capitate cystidia and basidiospores of approximately the same shape and size. However, it is differentiated by the presence of cystidia both in the hymenium and the rhizomorphs and the absence of gloeocystidia (Yorou et al. 2007). T. cystidiata and T. citrinocystidiata have capitate cystidia and rhizomorphs, but the cystidia in the two species are without oily appearance.
Reference: Hai‑Sheng Yuan1,2· Xu Lu1,2 · Yu‑Cheng Dai3 ·
A basidiocarp of Tomentella gloeocystidiata (IFP 019289, holotype)
