Fuscoporia ramulicola Y.C. Dai & Q. Chen

Chen, Qian & Dai, Yu-Cheng, 2019, Two new species of Fuscoporia (Hymenochaetales, Basidiomycota) from southern China based on morphological characters and molecular evidence, MycoKeys 61, pp. 75-89 : 75

Fuscoporia ramulicola Y.C. Dai & Q. Chen sp. nov. Figs 3B , 5

Type.

China. Yunnan Province: Binchuan County, Jizushan Park, 30 August 2015, on fallen angiosperm branch, Dai 15723 (holotypes: BJFC 019827).

Etymology.

" Ramulicola " (Latin) referring to the species growing on branches.

Description.

Basidiocarps annual, resupinate, effused, inseparable, without taste or odor and corky when fresh, light-weight and hard corky when dry, up to 10 cm long, 2.2 cm wide and 1 mm thick at center. Pore surface grayish brown, fawn, cracked with age; sterile margin yellowish brown to olivaceous buff, distinctly paler than tubes, up to 1 mm wide; pores more or less angular, 6-7 per mm; dissepiments thin, sometimes irregular to slightly lacerate; abundant setae seen in tube cavities (under lens). Subiculum reddish brown, corky, very thin, about 0.1 mm thick. Tubes olivaceous buff, paler contrasting with pores and subiculum, hard corky, up to 0.9 mm long.

Hyphal structure.

Hyphal system dimitic; generative hyphae simple septate; tissue darkening but otherwise unchanged in KOH.

Subiculum.

Generative hyphae rare, hyaline, thin-walled, occasionally branched and simple septate, 2.5-3 μm in diam; skeletal hyphae dominant, rust-brown, thick-walled with a wide lumen, unbranched, aseptate, flexuous, loosely interwoven, 3-3.8 μm in diam.

Tubes.

Generative hyphae rare, mostly present at dissepiment edges and subhymenium, hyaline, thin-walled, occasionally branched and frequently simple septate, 1.8-2.8 μm in diam, some of them at dissepiment edges and in the hymenium encrusted with small crystals; skeletal hyphae dominant, yellowish brown, thick-walled with a wide lumen, unbranched, aseptate, flexuous to more or less straight, subparallel along the tubes, 2.5-3.8 μm in diam. Irregular crystals usually present among trama and hymenia.

Hymenium.

Hymenial setae frequent, mostly originating from hymenium, subulate, dark brown, thick-walled, 35-60 × 4.5-7 μm; cystidioles fusoid, sometimes covered with crystals, hyaline and thin-walled, 15-22 × 3-5 μm; basidia barrel-shaped, with four sterigmata and a simple septum at the base, 9-11 × 4.5-5.5 μm; basidioles frequently in hymenium, similar in shape to the basidia, but slightly smaller. Basidiospores cylindrical, hyaline, thin-walled, smooth, usually glued in tetrads, IKI–, CB–, with some small guttules, (5.2 –)5.8–7(– 7.2) × (1.8 –)2–2.5(– 2.8) μm, L = 6.37 μm, W = 2.28 μm, Q = 2.57-2.88 (n = 60/2).

Additional specimen examined (paratype).

China. Hainan Province: Wuzhishan County, Wuzhishan Nature Reserve, 14 Nov 2015, on fallen angiosperm branch, Dai 16155 (BJFC 020252).

Figures

Figure 3. Basidiocarps of Fuscoporia. A F. acutimarginata (Dai 15137) B F. ramulicola (Dai 16155). Scale bars: 10 mm.

Figure 5. Microscopic structures of Fuscoporia ramulicola (Holotype, Dai 15723) A basidiospores B basidia and basidioles C cystidioles D hymenial setae E generative hyphae at dissepiment edge F hyphae from trama G hyphae from subiculum.