Ceraceomyces yunnanensis Q. Yuan & C.L. Zhao, 2023

Yuan, Qi, Luo, Kai-Yue, Zhang, Ying & Zhao, Chang-Lin, 2023, Morphological characteristics and phylogenetic analyses revealed three new wood-inhabiting fungi (Agaricomycetes, Basidiomycota) in Southern China, Phytotaxa 592 (3), pp. 179-195 : 186-187

Ceraceomyces yunnanensis Q. Yuan & C.L. Zhao , sp. nov. Figs. 3 , 4

MycoBank no.: MB 846982

Holotype:— CHINA, Yunnan Province, Honghe, Pingbian County, Daiweishan National Nature Reserve , E 103°42′, N 22°57′, elev. 2100 m, on the fallen branch of angiosperm, 9 June 2020, CLZhao 19070 ( SWFC).

Etymology:— yunnanensis (Lat.) —refers to the locality (Yunnan Province) of the type specimens.

Fruiting body:— Basidiomata resupinate, adnate, pellicular when fresh, membranous upon drying, without odor or taste when fresh, up to 10 cm long, 4 cm wide, 100–200 µm thick. Hymenial surface merulioid, cream when fresh, turn to cream to slightly buff upon drying. Margin sterile, white, fimbriate.

Hyphal structure:— Hyphal system monomitic, generative hyphae with clamp connections, colorless, thin-walled, branched, interwoven, 2.2–6.4 µm in diameter, IKI–, CB–; tissues unchanged in KOH.

Hymenium:— Cystidia and cystidioles absent; basidia narrowly clavate, in a dense palisade, with 4 sterigmata and a basal clamp connection, 14–19 × 2.5–4 µm.

Spores:— Basidiospores cylindrical, colorless, smooth, thin-walled, IKI–, CB–, 3–4 × 1–1.5 µm, L = 3.54 µm, W = 1.33 µm, Q = 2.56–2.73 (n = 180/6).

Additional specimens examined (paratypes):— China, Yunnan Province, Honghe, Pingbian County, Daiweishan National Nature Reserve , E 103°42′, N 22°57′, elev. 2100 m, on angiosperm trunk, 9 Jun 2020, CLZhao 19024 ( SWFC), CLZhao 19054 (SWFC), 8 Jun 2020, CLZhao 18930 ( SWFC), on fallen angiosperm branch, 9 Jun 2020, CLZhao 18992, CLZhao 6132 ( SWFC) ; Puer, Jingdong County, Wuliangshan National Nature Reserve , E 100°08′, N 24°04′, elev. round to 3000 m, on the stump of angiosperm, 5 Oct 2017, CLZhao 4112 ( SWFC).

Figures

FIGURE 3. Basidiomata of Ceraceomyces yunnanensis (holotype). Bars:A = 1 cm, B = 1 mm.

FIGURE 4. Microscopic structures of Ceraceomyces yunnanensis (holotype). A Basidiospores. B basidioles. C Basidia. D A section of hymenium. Bars: A = 5 µm, B–D = 10 µm.