Phanerochaete thailandica Kout & Sádlíková

MycoBank 821779

Etymology – referring to the locality of the species in Thailand.

Type –Thailand, Krabi Province, south of Koh Lanta Yai island, near Mu Koh Lanta National Park, Bamboo Bay resort, on the dead angiosperm trunk, 1 July 2015, M. Sádlíková (holotype in PRM 945578, isotype in CBG).

Fruiting body annual, easily separable, resupinate, soft, 250–270 μm thick in section, with remarkable brown subiculum. Hymenial surface smooth, not cracked when dry, beige, buff, creamy; margin sometimes fimbriate, whitish, colour unchanged with KOH solution (except darkening). Hyphal system monomitic with predominant unclamped, thin-walled hyphae; in subhymenium often finely incrusted by granular crystals, with right-angled anastomoses between hyphae, relatively short celled, hyaline, 2–4 μm in diam; subiculum approx. 150 μm thick, hyphae horizontal, loosely interwoven, branching, often septate, occasionally with single clamp or multiple clamps, mainly thin-walled, sometimes slightly thick-walled, partially incrusted, brown, 3–6 μm in diam., quasi-binding hyphae often. Leptocystidia occasionally present, slightly projecting outside of hymenium, thin-walled, cylindrical, obtuse, sometimes up to subcapitate, attenuated to the base, hyaline, 33–62 × 5–7 μm. Basidia with four sterigmata, without basal clamp, narrowly clavate, 25–38 × 5–7 μm. Basidiospores ellipsoid, thin-walled, smooth, hyaline, sometimes with one guttule, 7–8(–8.5) × (3.5–)4–4.5(–5) μm, L = 7.39, W = 4.11, Q = 1.79 (n = 20). All structures without reaction in Melzer`s solution. Type of rot – White rot.

Known distribution – Known from type locality only but probably more spreading at least in tropical region in Asia.

Maximum-likelihood phylogram of evolutionary relationships of Phanerochaete thailandica. The tree with the highest log likelihood (-2269.19) is shown. The percentage of trees in which the associated taxa clustered together is shown next to the branches. The tree is drawn to scale, with branch lengths measured in the number of substitutions per site.

Phanerochaete thailandica. Fruiting body. – Bars = 1 mm.

Phanerochaete thailandica. Vertical section of fruiting body with remarkable brown subiculum. – Bar = 100 μm.

Phanerochaete thailandica. Detail view in subiculum with quasi-binding hyphae. – Bar = 50 μm.

Phanerochaete thailandica. Leptocystidium. – Bar = 10 μm.

Phanerochaete thailandica. Part of hymenium with basidia. – Bars = 10 μm.