Coniophora yunnanensis Y. Yang & C.L. Zhao, 2023

Yang, Yang, Li, Rong, Liu, Chaomao & Zhao, Changlin, 2023, Morphological and molecular identification for two new species of woodinhabiting macrofungi (Basidiomycota) from Yunnan-Guizhou Plateau, China, Phytotaxa 591 (1), pp. 1-18 : 7-10

Coniophora yunnanensis Y. Yang & C.L. Zhao , sp. nov. Figs. 1 , 2 , 4 , 5

MycoBank no.: MB 847019

Holotype:— CHINA. Yunnan Province, Pu’er, Jingdong County, Wuliangshan National Nature Reserve , E 100°31′10′′, N 24°25′07′′, elev. 1500 m, on the dead bamboo, 2 October 2017, CLZhao 3594 ( SWFC!), GenBank No. (ITS OP901837; nLSU OP904196).

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

Basidiomata: —Annual, resupinate to effused, separable, soft ceraceous, without odor or taste when fresh, becoming hard corky upon drying, up to 10 cm long, 4 cm wide, 0.5–1 mm thick; hymenial surface odontoid, 100–500 µm long, olivaceous buff (4C4) when fresh, olivaceous buff (4C4) to greyish brown (5/6E4) drying; sterile margin indistinct and olivaceous buff (4C4).

Hyphal structure: — Hyphal system monomitic; generative hyphae with simple septa, colorless, thin-walled, rarely branched, interwoven, 2.5–6 μm in diam; IKI–, CB–, tissues unchanged in KOH.

Hymenium : — Cystidia and cystidioles absent; basidia cylindrical, constricted, 40–90 × 5–7 µm, with 4-sterigmata and a basal simple septum, basidioles dominant, in shape similar to basidia, but slightly smaller.

Basidiospores: — Ovoid to broadly ellipsoid, smooth, thick-walled, pale yellowish, with oil drops, IKI–, CB–, (8–)8.5–12.5 × (5.5–)6.5–8.5 µm, L = 10.7 µm, W = 7.27 µm, Q = 1.46–1.53 (n = 60/2), Qm = 1.47.

Additional specimen examined: — CHINA. Yunnan Province, Pu’er, Jingdong County, Wuliangshan National Nature Reserve , E 100°31′10′′, N 24°25′07′′, elev. 1500 m, on the dead bamboo, 2 October 2017, CLZhao 3517 ( SWFC!), GenBank No. (ITS OP901836; nLSU OP904195) .

Notes: Morphologically, Coniophora arida (Fr.) P. Karst. (1868: 370) , C. hanoiensis Pat. (1907: 76) , C. olivacea (Fr.) P. Karst. (1879: 162) , and C. puteana (Schumach.) P. Karst. (1803: 397) are similar to C. yunnanensis by having ovoid to ellipsoid basidiospores. However, C. arida differs from C. yunnanensis by its wider basidia (40–70 × 7–10 µm), and presence of the hyphal strands ( Bernicchia & Gorjón 2010); C. hanoiensis is separated from C. yunnanensis by its white to yellowish-brown hymenial surface and dimitic hyphal system ( Ginns 1982); C. olivacea is distinguished from C. yunnanensis by smooth hymenial surface, presence of the thick-walled septate cystidia and dextrinoid basidiospores ( Bernicchia & Gorjón 2010); C. puteana is separated from C. yunnanensis by having the tabular, yellowish-brown, smooth basidiomata and brownish basidiospores ( Bernicchia & Gorjón 2010).

Coniophora yunnanensis resembles C. arachnoidea , C. fusispora (Cooke & Ellis) Cooke (1889: 650) and C. ladoi Tellería (1991: 236) in having a odontoid hymenial surface. However, Coniophora arachnoidea is different from C. yunnanensis by brownish hymenophore and smaller basidiospores (6–8 × 4–5 µm) ( Blanco et al. 2009); C. fusispora can be delimited from C. yunnanensis by its orange-yellow to brown hymenophore and longer basidiospores (14–20 × 5–8 µm) ( Bernicchia & Gorjón 2010); C. ladoi is distinguished from C. yunnanensis by small basidiospores (5.5–7.5 × 3.5–4.5 µm) ( Bernicchia & Gorjón 2010).

Figures

FIGURE 1.MaximumParsimonystrictconsensus treeillustratingthephylogeny oftwonew speciesandrelatedspecies inAgaricomycetidae based on ITS+nLSU sequences. Branches are labeled with maximum likelihood bootstrap values equal to or above 70%, parsimony bootstrap values equal to or above 50% and Bayesian posterior probabilities equal to or above 0.95. The new species are in bold.

FIGURE 2. Maximum Parsimony strict consensus tree illustrating the phylogeny of the new species of Coniophora based on ITS sequences. Branches are labeled with maximum likelihood bootstrap values equal to or above 70%, parsimony bootstrap values equal to or above 50% and Bayesian posterior probabilities equal to or above 0.95.

FIGURE 4. Basidiomata of Coniophora yunnanensis. Bars:A = 1 cm; B = 2 mm (holotype). Photos by: Yang Yang

FIGURE 5. Microscopic structures of Coniophora yunnanensis (drawn from the holotype). A. Basidiospores. B. Basidia and basidioles. C. A section of hymenium. Bars: A–C = 10 µm. Drawings by: Yang Yang