Polyporales » Polyporaceae » Yuchengia

Yuchengia narymica

Yuchengia narymica (Pilát) B.K. Cui, C.L. Zhao & K.T. Steffen 2013, in Cui, et al., Fungal Diversity 97, 137392 (2019)

Diagnosis: Basidiocarps annual, resupinate, corky, without odor or taste when fresh, becoming hard corky upon drying, up to 16 cm long, 7 cm wide and 1 cm thick at center. Pore surface cream when fresh, light buff to cream buff upon drying; pores angular, 45 per mm; dissepiments thin, entire. Sterile margin narrow, cream to cream buff, up to 1 mm wide. Subiculum cream, thin, up to 0.5 mm thick. Tubes concolorous with pore surface, hard corky, up to 9.5 mm long.

Hyphal system dimitic; generative hyphae bearing clamp connections; skeletal hyphae weakly to distinctly IKI+, CB, dissolving in KOH. Generative hyphae hyaline, thin-walled, occasionally branched, 2.34 µm in diam; skeletal hyphae dominant, hyaline, thick-walled with a wide to narrow lumen, unbranched, interwoven, 1.94.8 µm in diam.

Generative hyphae hyaline, thin-walled, rarely branched, 23.5 µm in diam; skeletal hyphae dominant, hyaline, thick-walled with a wide to narrow lumen, unbranched, interwoven, 1.84.6 µm in diam. Cystidia absent; fusoid cystidioles present, hyaline, thin-walled, 14.220.7 × 3.66.3 µm. Basidia clavate, with four sterigmata and a basal clamp connection, 16.819.2 × 5.88.8 µm; basidioles dominant, in shape similar to basidia, but slightly smaller.

Basidiospores ellipsoid, non-truncate, hyaline, thick-walled, smooth, IKI, CB +, (4.1–)4.25.2(–5.3) × (3.1–)3.24(–4.1) µm, L = 4.83 µm, W = 3.74 µm, Q = 1.241.33 (n = 120/4).

Index Fungorum Number: IF563491

Notes:  Yuchengia narymica is characterized by acyanophilous and amyloid skeletal hyphae that dissolve in KOH, and thick-walled basidiospores that are cyanophilous and negative in Melzers reagent. The taxonomic position of Y. narymica has been resolved based on morphological characters and phylogenetic analysis of rDNA sequences by Zhao et al. (2013).


                                                Figure 1Basidiocarps of Yuchengia narymica


Figure 2Microscopic structures of Yuchengia narymica (drawn from Dai 6998). a. Basidiospores; b. Basidia and basidioles; c. Cystidioles; d. Hyphae from trama. Bars: a = 5 µm; bd = 10 µm


Cui, B.K., & Li, H.J., & Ji, X., & Zhou, J.L., & Song, J. & Si, J., & Yang, Z.L., & Dai, Y.C. (2019). Species diversity, taxonomy and phylogeny of Polyporaceae (Basidiomycota) in China. Fungal Diversity 97, 137392.

Zhao, C. L., & Cui, B. K., & Steffen, K. T. (2013). Yuchengia, a new polypore genus segregated from Perenniporia (Polyporales) based on morphological and molecular evidence. Nordic Journal of Botany 31, 331-338.


About Basidiomycota

The webpage Basidiomycota provides an up-to-date classification and account of all genera of the phylum Basidiomycota.


Supported by 

Thailand Science Research and Innovation (TSRI)

project entitled:

"Macrofungi diversity research from the Lancang-Mekong Watershed and surrounding areas"

(Grant No. DBG6280009)


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