Typhrasa polycystis 2021

Typhrasa polycystis J.Q Yan & S.N. Wang sp. nov.2021

MycoBank: 838482

Holotype：China. Jiulianshan National Nature Reserve, Jiangxi Province, 25 June 2020, Jun-Qing Yan, HFJAU1454.

Description：

Sexual morph：Pileus 20–35 mm, extending hemispherically to expanded, plane with or without umbo, surface with slightly ridge-like folds or smooth, hygropha nous, brown , pale brownat the margin. Veil distinct, fi brous or fluffy, white, markedly appendiculate at margin, falling off easily. Context thin and fragile, hygrophanous at pileus, about 3.0 mm at the centre. Gills 4.0–5.0 mm broad, moderately close, pale cinnamon with a white  edge, adnexed. Stipe 30–45 mm long, 5.0–8.0 mm thick, white  hol low, pulverulent at apex, with fibrils and fluffy from pellicular veil remnants below, falling off easily Spores (6.9)7.1–8.2 × (4.2)4.3–5.1(5.2) μm, Q = (1.4)1.5–1.8(1.9), ellipsoid to oblong-ellipsoid, profile flattened on one side, 4.1–5.0(5.2) μm broad, smooth, reddish-brown  in water, yellow-brown  in 5% KOH or 10% NH3 ·H2 O, becoming darker  in 5% KOH, germ pore small and indistinct, 1–2 guttulate, inamyloid. Basidia 21–24 × 7.5–8.5 μm, 4-spored, clavate, hyaline. Pleurocystidia 55–81(87) × 11–17(18) μm, variously shaped, often fusiform and la geniform, with rostrum; rarely fusiform with subacute to acute apex or cystiform with rostrum, with one or two large internal oily drops, oily drops colourless and distinct or indistinct in 5% KOH, glassy-yellow  and very distinct in Melzer’s Reagent. Cheilocystidia (24)30–54(58) × (9)10–15(16) μm, similar to pleurocystidia, abun dant, rarely mixed with pyriform or clavate cells. Trama of gills consisting of parallel hyphae. Pileipellis a 2–3 cells deep layer of subglobose or pyriform cells which are 24–36 μm wide. Veil composed of hyphae 6.5–14.5 μm-broad, thin-walled and fawn hyphae in 5% KOH. Clamps present in trama of gills, hyphae of stipe and at the base of the basidia and cystidia.

Asexual.morph:Undetermined:

Culture: Undetermined:

Habitat: Undetermined:

Distribution：Saprotrophic, solitary to slightly caespitose on rotten hard wood or humus in mixed forests.

GenBank Accession: ITS MW466538，LSU MW466544，tef-1αM W475280；

ITS MW466539，LSU MW466545，tef-1α MW475281；ITS MW466540

Notes: Undetermined:

Reference: [1] Wang, S. N. ,  Hu, Y. P. ,  Chen, J. L. ,   Qi, L. L. , &  Yan, J. Q. . First record of the rare genus typhrasa (psathyrellaceae, agaricales) from china with description of two new species. MycoKeys, 79, 119-128.

a–c basidiomata d basidiospores e basidia f pleurocystidia g cheilocystidia. Scale bars: 20 mm (a–c); 10 μm (d–g).