Auricularia thailandica

Auricularia thailandica 

Index Fungorum Number: IF 550992; Facesoffungi number: FoF 00467.

Basidiome: 2–5 cm diam., short stalks, orbicular to cupulate to auriculiform, semi-transparent, brownish orange, 5C5, ridges and veins seen on abhymenial surface, individual hairs clearly distinguishable, hairs not dense, margins darker brown, 6E8.

Internal features: thickness 340–700 μm; medulla present; abhymenial hairs scattered, non-gregarious, hyaline, acute tip, thin or thick walled, 0.9–3.7 μm, clear lumen, septa observed, hair bases 5–11.4 μm wide, hair bases pigmented, light brown, plasmatic; clamp connections present; zona pilosa ≤80 μm; zona compacta 23–46 μm; zona subcompacta superioris 10–29 μm; zona laxa superioris 35–181 μm; medulla 31–98 μm; zona laxa inferioris 98–307 μm; zona subcompacta inferioris 21–78 μm; hymenium 44–78 μm; basidia 34.67–48.41 × 2.73–6.31 μm, cylindrical, tapered or blunt ends, transversely 3-septate, sterigmata observed; spores smooth walled, allantoid, 9.47–13.10 × 4.45–5.66 μm, Q = 1.80–2.80, with one or two large guttules. (Fig. 1)

Etymology: The species epithet “thailandica” refers to the country from where the holotype was collected.

Material examined: THAILAND. Chiang Mai: Bahn Pa Dheng, Mushroom Research Center, dead wood, 14 August 2013, S.C. Karunarathne K2013117 (MFLU 130410, holotype). CHINA. Yunnan: Mengsong, Plot-145, on dead wood, 23 May 2012, S.C. Karunarathne MS09 (MFLU 130411); THAILAND. Chiang Mai: Bahn Pa Dheng, Mushroom Research Center, dead wood, 12 June 2013, A.B. Bandara AB201323 (MFLU 130396); THAILAND. Chiang Rai: Doi Mae Salong, decaying tree trunk, June 2013, A.B. Bandara AB201326 (MFLU 130399); PHILIPPINES. Quezon: Unisan, on deadwood, March 2012, P. Alva PA30 (MFLU 130417).