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Thelephora alpina (Peintner & Dämmrich) Kõljalg, I. Saar & Svantesson 2024

Syn. Tomentella alpina Peintner & Dämmrich 2010

Basidiomes resupinate, adherent to the substrate (soil, stones or to the exposed side of broken turf), arachnoid to pelliculose, up to 1 mm thick, continuous.

Hymenophore smooth, hazelnut brown, reddish brown, without colour changes. Margin notdifferentiated.

Rhizomorphs absent.

Subiculum dark brown, concolorous to slightly darker than the fertile area, with paler basal hyphae, not incrusted.

Hyphal system monomitic, hyphae not amyloid.

Subicular hyphae brownish, mostly regular, clamped, thick-walled, not incrusted, 5–7.5 μm wide.

Subhymenial hyphae subhyaline, colourless to very pale brown, clamped, mostly regular, thin- to slightly thick-walled, 5–7.5 μm wide.

Cystidia absent. Basidia subcylindrical to suburniform, subhyaline, clamped at the basal septum,

not cyanescent, 35–45 × 7–8 μm, with 4 sterigmata up to 10 μm long.

Basidiospores brownish, pale brown, frontally globose to subglobose, laterally subglobose to broad ellipsoid, adaxially partly flattened, (5.5)6.5–8.5(9.5) × (6)6.5–8.5 μm, (10 collections n=289 spores);

holotypus: (5.5)6–7.5(9) × (6)6.5–8.5 μm, (n=49), echinulate, aculei 0.8–1 μm long, apiculus not amyloid, spore wall not cyanophilous nor amyloid.

Chlamydospores not observed.

Tomentella alpina (Typus). a Basidiome, b subhymenial hyphae, c, d basidiospores,

e basidia, f thick-walled subicular hyphae with clamps.

Scale bars (a) 1 mm, (b–f) 10 μm