Favolaschia miscanthi Q.Y. Zhang, L.S. Bian, F. Wu & Y.C. Dai, 2024

Zhang, Qiu-Yue, Liu, Hong-Gao, Li, Wan-Ying, Zhang, Xin, Dai, Yu-Cheng, Wu, Fang & Bian, Lu-Sen, 2024, Three new species of Favolaschia (Mycenaceae, Agaricales) from South China, MycoKeys 104, pp. 71-89 : 71

Favolaschia miscanthi Q.Y. Zhang, L.S. Bian, F. Wu & Y.C. Dai sp. nov.

Figs 3B , 5

Type.

China, Guangxi Autonomous Region, Hezhou, Dazhongshan Forest Park , rotten Miscanthus , 19 Apr 2023, Dai 24652 (BJFC042179, holotype) .

Etymology.

" miscanthi " (Lat.): refers to the species inhabiting rotten Miscanthus.

Macrostructures.

Basidiomata annual, gregarious, gelatinous when fresh and dry. Pilei 3-6 × 1.5-4 mm, conchoid or semicircular; pileal surface satin white (1A1-2A1) when fresh and drying, convex, transparent with a reticulate pattern matching the pores below, glabrous; margin straight, crenulate; context thin, transparent. Hymenophore concolorous with pileal surface, poroid, up to 40 pores per basidiocarp; mature pores 0.5-1 mm diam., polygonal, larger near the base and smaller near the edge, the marginal pores often incomplete; tubes up to 0.4 mm long. Stipe absent.

Microstructures.

Basidiospores 7.5-10 × 5.5-7(-7.5) µm, L = 8.90 μm, W = 6.28 μm, Q = 1.37-1.46 (n = 60/2), broadly ellipsoid to subglobose, hyaline, thin-walled, smooth, with some guttules, faintly IKI+, CB-. Basidia 32-45 × 7-10 μm, narrowly clavate, tapered towards the base, apex broadly rounded, 4-spored, sterigmata 2-8 μm long; basidioles similar in shape to the basidia, but slightly smaller. Gloeocystidia and acanthocystidia absent. Cheilocystidia 17-34 × 7-10 μm, present at dissepiment edge, broom-shaped or irregular with small diverticulate projections on the sides and at the apex, thin-walled. Pileipellis hyphae interwoven, smooth to diverticulate, thin-walled, 4-7 µm in diam.; terminal cells cylindrical or clavate, with obtuse diverticulate projections at the apex, orientated perpendicular to pileal surface. Tramal hyphae interwoven, widely spaced in a gelatinous matrix, some with dense contents, some collapsed, thin-walled, 2-6 μm in diam. Clamp connections present.

Additional specimen examined.

China, Guangxi Autonomous Region, Hezhou, Dazhongshan Forest Park, rotten Miscanthus , 19 Apr 2023, Dai 24653 (BJFC042180, paratype).

Distribution and ecology.

Favolaschia miscanthi is distributed in the subtropical area of the Guangxi Autonomous Region, China; it grows on rotten Miscanthus and causes white rot.

Figures

Figure 3. Dry basidiomata of Favolaschia species A Favolaschia imbricata B Favolaschia miscanthi C, D Favolaschia sinarundinariae. Scale bars: 1 mm.

Figure 5. Basidiomata and microscopic structures of Favolaschia miscanthi A, B basidiomata (A Dai 24652, holotype B Dai 24653) C basidiospores D hymenium in trama E basidia and basidioles F tramal hyphae G cheilocystidia at dissepiment edge H hyphae of pileipellis I terminal cells of pileipellis. Scale bars: 5 mm (A, B); 10 µm (C-I).