Tomentella fuscopelliculosa H.S. Yuan, X. Lu & Y.C. Dai 2020
Index Fungorum number: IF555743; Facesoffungi number: FoF 05623
Holotype: CHINA, Jilin Province, Changbaishan Nature Reserve, on fallen angiosperm branch, 7 August 2016, Yuan 11305 (IFP 019285, holotype), Yuan 11316 (IFP 019286).
Morphological description
Basidiocarps annual, resupinate, adherent to the substrate, pelliculose, without odour or taste when fresh, 0.8–1.5 mm thick, continuous. Hymenophoral surface smooth, brown to dark brown (6E5–6F5) and lighter than subiculum when dry. Sterile margin often indeterminate, farinaceous, concolorous with hymenophore. Rhizomorphs absent. Subicular hyphae monomitic; generative hyphae clamped and rarely simple septate, thick-walled, occasionally branched, 3.5–5 μm diam, without encrustation, pale brown in KOH and in distilled water, cyanophilous, inamyloid. Subhymenial hyphae clamped and rarely simple septate, thin-walled, rarely branched, 4–6 μm diam; hyphal cells short and inflated, pale brown in KOH, cyanophilous, inamyloid. Cystidia absent. Basidia 10–55 μm long and 4–9 μm diam at apex, 3–6 μm at base, with a clamp connection at base, utriform, not stalked, sinuous, rarely with transverse septa, pale brown in KOH and in distilled water, 4-sterigmate; sterigmata 6–8.5 μm long and 1.5–2.5 μm diam at base. Basidiospores thick-walled, (8–)8.5–9.5(–11) × (7.5– )8–9(–10.5) μm, L = 8.75 μm, W = 8.23 μm, Q = 1.05–1.09 (n = 60/2), globose to subglobose in frontal and lateral views, echinulate, pale brown in KOH and in distilled water, cyanophilous, inamyloid; echinuli usually isolated, sometimes grouped in 2 or more, up to 2 μm long.
Habitat: On fallen angiosperm branch.
Distribution: In China.
GenBank Accession: ITS: MK211716, MK211717; LSU: MK446372, MK446373.
Notes: Tomentella stipitata is similar to T. fuscopelliculosa by basidiocarps adherent to the substrate, a farinaceous sterile margin, short and infated subhymenial hyphal cells, utriform basidia, thick-walled basidiospores and the absence of rhizomorphs and cystidia. However, T. stipitata difers from T. fuscopelliculosa by having mucedinoid basidiocarps and subglobose to bi- or tri-lobed basidiospores. T. pertenuis resembles T. fuscopelliculosa by basidiocarps adherent to the substrate with a farinaceous sterile margin, utriform basidia, the absence of rhizomorphs and cystidia, and thick-walled, globose to subglobose basidiospores. But, it is diferentiated by yellowish brown basidiocarps, slightly thick-walled subhymenial hyphae, and more or less uniform subhymenial hyphal cells.
Reference: Hai‑Sheng Yuan1,2· Xu Lu1,2 · Yu‑Cheng Dai3 ·
A basidiocarp of Tomentella fuscopelliculosa (IFP 019285, holotype)
