Bjerkandera minispora 2021

Bjerkandera minispora Y.C. Dai & Chao G. Wang, sp. nov.

MycoBank: 838580

Type：China. Hainan Province, Wuzhishan County, Wuzhishan Nature Reserve, 18°54'N, 109°42'E, fallen angiosperm trunk, 31. V. 2015, Y.C. Dai 15234 (holotype BJFC019345).

Description:

Sexual morph: Basidiomata. Annual, pileate, solitary or imbricate, soft corky, without odor or taste when fresh, becoming corky when dry. Pilei flabelliform, projecting up to 4 cm, 5 cm wide and 3 mm thick at base. Pileal surface pinkish-buff to buff, becoming dark when touched, velutinate to glabrous, azonate; margin a bit acute. Pore surface buff yellow, ash-grey to pale brown when dry, touched or bruised parts becoming almost black; sterile margin distinct, up to 1.5 mm wide; pores tiny, round to angular, 6–9 per mm; pores mouth sometimes with white tomentum; dissepiments thin, entire to lacerate. Context cream to pinkish-buff, corky, up to 2 mm thick. Tubes concolorous with the pore surface, darker than context, corky, up to 1 mm long, with a distinct dark line between tubes and context Tubes. Generative hyphae thin-walled, frequently branched, agglutinated and loosely interwoven, 2.5–3.5 μm in diam. Cystidia and cystidioles absent. Basidia clavate, sometimes with an intermediate constriction, with four sterigmata and a basal clamp connection, 9.5–11.5 × 4–5 μm; basidioles of similar shape to basidia, but smaller. Basidiospores. Oblong-ellipsoid to ellipsoid, hyaline, thin-walled, smooth, of ten with one or more guttules, CB–, IKI–, (3–)3.1–4.2(–4.8) × 2–2.8(–3) μm, L = 3.64 μm, W = 2.4 μm, Q = 1.49–1.54 (n = 60/2).

Asexual.morph:Undetermined:

Hyphal structure: Hyphal system monomitic; generative hyphae with clamp con nections, smooth, hyaline to pale yellow, CB+, IKI–; tissues becoming dark in KOH.

Culture: Undetermined:

Habitat: Undetermined:

Distribution:China

GenBank Accession: ITS MW507115 LSUMW520214；ITS MW507116 LSUMW520215；

Notes: Undetermined:

Reference: [1] Wang, C. G. , Josef Vlasák, &   Dai, Y. C. . (2021). Phylogeny and diversity of bjerkandera (polyporales, basidiomycota), including four new species from south america and asia. MycoKeys, 79, 149-172.

A basidiomata B poroid surface detail C a dark line between tubes and context. Scale bars: 1 cm (A); 1 mm (B, C).

a basidiospores b basidia and basidioles c hyphae from trama d hyphae from context.