Paradonkia Y. Xu & C. L. Zhao, 2025

Xu, Ying, Yang, Yang, Yang, Xin, Chen, Daxiang, Zheng, Wen, Shen, Kaize, Zhang, Sicheng & Zhao, Changlin, 2025, Molecular phylogeny and taxonomy reveal two new genera and five new species in Phanerochaetaceae (Polyporales) from Yunnan, Southwest China, MycoKeys 113, pp. 263-294 : 263-294

Paradonkia Y. Xu & C. L. Zhao gen. nov.

Type species.

Paradonkia farinacea Y. Xu & C. L. Zhao .

Etymology.

paradonkia (Lat.): “ para ” and “ donkia ” refer to a close phylogenetic relationship with the genus Donkia.

Description.

Basidiomata annual, resupinate, adnate. Hymenial surface farinaceous, pale cream to gray cream. Hyphal system monomitic; generative hyphae with both simple septa (more frequent) and clamp connections, colorless. Subicular hyphae colorless, thick-walled. Crystals abundant, crowded at hymenial layer and subiculum. Cystidia and cystidioles absent. Basidia clavate, thin-walled, 4 - sterigmate. Basidiospores ellipsoid, colorless, thin-walled, smooth, IKI –, CB –.

Notes.

In our phylogenetic analysis (Fig. 1 ), Paradonkia is identified as a monophyletic group typified by P. farinacea . The new genus Paradonkia falls within the family Phanerochaetaceae ( Polyporales ) and is closely related to Donkia . The genus Donkia is distinguished from Paradonkia by its pileate basidiomata with a white to cream context, and cinnamon to orange-brown, odontoid to hydnoid hymenophore ( Nakasone 1990; Chen et al. 2021).

Figures

Figure 1. Maximum parsimony strict consensus tree illustrating the phylogeny of Paradonkia and Neodonkiella and related genera in the family Phanerochaetaceae based on ITS + nLSU sequences. Branches are labelled with maximum likelihood bootstrap value ≥ 70 %, parsimony bootstrap value ≥ 50 %, and Bayesian posterior probabilities ≥ 0.95. Colored bars represent different genera.