Tomentella coffeae H.S. Yuan & Y.C. Dai 2020
Index Fungorum number: IF555693; Facesoffungi number: FoF 05611
Holotype: CHINA, Liaoning Province, Huanren County, Laotudingzi Nature Reserve, on rotten angiosperm wood debris, 20 October 2015, Yuan 10629 (IFP 019259, holotype); Xifeng County, Binglashan National Forest Park, on fallen angiosperm branch, 2 August 2016, Yuan 11100 (IFP 019260); Qingyuan County, Experimental Station of Forest Ecology, on fallen angiosperm branch, 23 October 2016, Yuan 10762.
Morphological description
Basidiocarps annual, resupinate, adherent to the substrate, mucedinoid, without odour or taste when fresh, 0.1–0.3 mm thick, continuous. Hymenophoral surface smooth, dark brown (7F5–7) and concolorous with subiculum when dry. Sterile margin often indeterminate, farinaceous, concolorous with hymenophore. Rhizomorphs absent. Subicular hyphae monomitic; generative hyphae with both clamps and simple septa, thick-walled, occasionally branched, 4–7 μm diam, without encrustation, deep yellow in KOH, slightly cyanophilous, inamyloid. Subhymenial hyphae clamped, thick-walled, frequently branched; hyphal cells short and inflated, 5–9 μm diam, deep yellow in KOH, cyanophilous, inamyloid. Cystidia absent. Basidia 30–50 μm long and 5–10 μm diam at apex, 3–5 μm at base, with a clamp connection at the base, clavate, stalked, sinuous, occasionally with transverse septa, deep yellow in KOH, deep yellow in distilled water, 4-sterigmate; sterigmata 3–5 μm long and 1–2 μm diam at base. Basidiospores thin- to slightly thick-walled, (6.5–)7–9(–9.5) × (6.5–)6.8–8.3(–8.5) μm, L = 8.37 μm, W = 7.62 μm, Q = 1.09–1.26 (n = 60/2), globose in frontal view and subglobose in lateral view, aculeate, yellowish orange in KOH, pale yellow in distilled water, cyanophilous, inamyloid; echinuli usually isolated, sometimes grouped in 2, up to 2 μm long.
Habitat: On rotten angiosperm wood debris.
Distribution: In China.
GenBank Accession: ITS: KY686255, KY686254; LSU: MK446350, MK446351.
Notes: Tomentella intsiae Suvi & Kõljalg resembles T. coffeae by having continuous basidiocarps adherent to the substrate, a smooth hymonophoral surface, the absence of rhizomorphs, thick-walled subicular hyphae and globose, echinulate basidiospores with long echinuli. However, the former species is differentiated by the absence of simple septate subicular hyphae and bigger basidiospores (9.5–11μm, Suvi et al 2010). T. lapida (Pers.) Stalpers is similar to T. cofeae by having continuous and mucedinoid basidiocarps adherent to the substrate, indeterminate sterile margins, the absence of rhizomorphs, and slightly globose basidiospores of approximately the same size. But T. lapida difers from T. cofeae by its smoke grey basidiocarps, clamped subicular hyphae and thin-walled subhymenial hyphae (Kõljalg 1996).
Reference: Hai‑Sheng Yuan1,2· Xu Lu1,2 · Yu‑Cheng Dai3 ·
A basidiocarp of Tomentella coffeae (IFP 019259, holotype)
