Junghuhnia subcollabens F. Wu, P. Du & X.M. Tian, sp. nov. 2020
MycoBank No: 834505
Holotype: China, Yunnan Province, Yongping County, Baitaishan Forest Park, on rotten angiosperm wood, 7.XI.2018 Dai 19345 (holotype, BJFC027813, isotype in IFP) and Dai 19344 (paratype, BJFC027812).
Morphological description
Basidiomata. Annual, resupinate, coriaceous, without odour or taste when fresh, hard corky when dried, 8 cm length, 3 cm width and 1.5 mm thick. Pore surface pale salmon when fresh, brownish-vinaceous when dried; margin indistinct to almost lacking; pores round to angular, 10–12 per mm; dissepiments thin to fairly thick, entire. Subiculum vinaceous, darker than pores, hard corky when dried, nearly 0.3 mm thick.
Tubes vinaceous, distinctly darker than pore surface, rigid, nearly 1.2 mm length.
Hyphal system. Hyphal system dimitic; generative hyphae with clamp connections and simple septa, skeletal hyphae IKI–, CB+; tissue unchanged in KOH.
Subiculum. Dominated by skeletal hyphae; generative hyphae hyaline, thin- to fairly thick-walled, frequently branched, 2.5–3 µm in diam.; skeletal hyphae thickwalled with a wide to narrow lumen, flexuous, occasionally branched, more or less gelatinised, interwoven, 2–4 µm in diam.
Tubes. Trama dominated by skeletal hyphae; generative hyphae hyaline, thin- to fairly thick-walled, frequently branched, with both simple septa and clamp connections, simple septa especially common at dissepiment edge, 2–3.2 µm in diam.; skeletal hyphae thick-walled with a wide to narrow lumen, rarely branched, flexuous, more or less gelatinised, interwoven, 2.5–3.5 µm in diam. Skeletocystidia clavate, thick-walled, originated from trama, apex covered with crystals, embedded amongst trama and dissepiments or projecting into hymenium, 35–50 × 6–9 µm. Fusoid cystidioles present, 8–14 × 3.5–2.5 µm; basidia clavate, bearing four sterigmata and a basal clamp connection, 10–12 × 4–5 µm; basidioles in shape similar to basidia, but smaller.
Spores. Basidiospores mostly lunate, hyaline, thin-walled, smooth, sometimes with one or two small guttules, IKI–, CB–, (2.8–)2.9–3.4(–3.5) × (1.5–)1.6–1.8(–1.9) µm, L = 3.12 µm, W = 1.67 µm, Q = 1.87 (n = 30/1).
Habitat: on rotten angiosperm wood
Distribution: China
GenBank Accession: ITS MN871758, MN871759; nLSU MN877771, MN877772
Notes:
Reference: Du P, Wu F, Tian X-M (2020) Three new species of Junghuhnia (Polyporales, Basidiomycota) from China.
Basidiomata of Junghuhnia subcollabens (holotype Dai 19345). Bar: 10 mm.
