Polyporales » Polyporaceae


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

Diagnosis: Basidiocarps annual, resupinate. Pore surface cream to yellowish buff; pores angular; dissepiments thin, entire. Subiculum cream to buff, thin. Tubes concolorous with pore surface, hard corky. Hyphal system dimitic; generative hyphae hyaline, thin-walled, rarely branched, bearing clamp connections; skeletal hyphae dominant, hyaline, thick-walled with a wide to narrow lumen, usually unbranched, interwoven, weakly to distinctly amyloid, acyanophilous, dissolving in KOH. Cystidia absent; cystidioles variably present. Basidia clavate, with four sterigmata and a basal clamp connection. Basidiospores ellipsoid, non-truncate, hyaline, thick-walled, smooth, IKI, CB +.

Index Fungorum NumberIF563490

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

Notes: Yuchengia was recently proposed by Zhao et al. (2013). Only one species, Y. narymica was included in this genus. The taxonomic position of Y. narymica has long been debated. The species was firstly described as Trametes narymica Pila´t (Pila´t 1936). Later, Pouzar (1984) proposed it as Perenniporia narymica, and this was widely accepted (Gilbertson & Ryvarden 1987; Ryvarden & Gilbertson 1994; Núñez & Ryvarden 2001; Dai et al. 2002). Decock & Stalpers (2006) mentioned that the species does not belong to Perenniporia, and suggested it might belong to Diplomitoporus Doman´ski because of its non-branched skeletal hyphae and thin-walled basidiospores. However, the study of the type specimen reveals that the basidiospores are distinctly thick-walled. This character would exclude both of these genera, thus, Yuchengia was proposed to accommodate P. narymica (Zhao et al. 2013).


Yuchengia narymica (Pilát) B.K. Cui, C.L. Zhao & K.T. Steffen 2013


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.

Dai, Y. C., & Niemelä, T., & Kinnunen, J. (2002). The polypore genera Abundisporus and Perenniporia (Basidiomycota) in China, with notes on Haploporus. In Annales Botanici Fennici 39, 169182.

Decock C, & Stalpers, J. (2006). Studies in Perenniporia: Polyporus unitus, Boletus medulla-panis, the nomenclature of Perenniporia, Poria and Physisporus, and a note on European Perenniporia with a resupinate basidiome. Taxon 53, 759778.

Gilbertson, R. L., & Ryvarden, L. (1987). North American Polypores Vol. 2. Megasporoporia-Wrightoporia. North American Polypores Vol. 2. Megasporoporia-Wrightoporia., 437-885.

Núñez, M, & Ryvarden, L. (2001) East Asian polypores 2. Synopsis Fungorum 14, 170522.

Pilát, A. (1936). Additamenta ad floram Sibiriae Asiaeque orientalis mycologicam. Bulletin de la Société mycologique de France 51, 351426.

Pouzar, Z. (1984). Notes on four European polypores. ńĆeska Mykol 38, 203-204.

Ryvarden, L., & Gilbertson, R. L. (1994). European Polypores, Part 2. Synopsis Fungorum 7, 394-743.

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.


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