Phanericium (Parmasto) K. H. Larss. & Spirin Type species. Corticium tuberculatum P. Karst. Description. Basidiomata resupinate, effused, membranous, soft-ceraceous, whitish or with yellowish, orange, or pale brownish tints, hymenium smooth, margin thinning out, abrupt, arachnoid or fimbriate, context white. Hyphal system monomitic, septa without clamps or with occasional clamps on subicular hyphae, subicular hyphae thin- to slightly thick-walled, mostly parallel and extending horizontally over the substrate, sometimes strongly covered by grainy crystals, subhymenium thickening, rather dense, hyphae thin-walled, growing vertically. Cystidia absent. Basidia clavate to narrowly clavate, with four sterigmata. Basidiospores narrowly ellipsoid to ellipsoid to subglobose, smooth, thin-walled, without reaction to Melzer’s or Cotton Blue (Larsson et al. 2025). Notes. Recent phylogenetic analyses demonstrate that Efibula is non-monophyletic (Floudas and Hibbett 2015; Chen et al. 2021; Li et al. 2022). Recent studies confirm earlier observations and recover a strongly supported clade centered around Corticium tuberculatum (Larsson et al. 2025). Therefore, Larsson et al. (2025) introduced the new genus Phanericium, which is clearly separated from the core of Efibula around the type E. tropica. In this study, a new species, Phanericium bambusacearum, is proposed based on morphological characters and multigene phylogenetic evidence. Comparative characteristics of Phanericium species are presented in Table 2 to establish taxonomic differentiation for the newly proposed species.

Published as part of Deng, Yinglian, Chen, Meng, Wang, Kaisheng, Liu, Wanting, Chen, Daxiang, Yang, Shunqiang, Li, Wenli, Zhou, Hongmin & Zhao, Changlin, 2025, Morphological and phylogenetic analyses reveal one new genus and six new species in Irpicaceae and Steccherinaceae (Polyporales, Basidiomycota) from the Yunnan – Guizhou Plateau, Asia, pp. e 172367 in IMA Fungus 16 on page e172367, DOI: 10.3897/imafungus.16.172367