Abstract

Fuscoporia (Hymenochaetaceae) is characterized by annual to perennial, resupinate to pileate basidiocarps, a dimitic hyphal system, presence of hymenial setae, and hyaline, thin-walled, smooth basidiospores. Phylogenetic analyses based on the nLSU and a combined ITS, nLSU and RPB2 datasets of 18 species of Fuscoporia revealed two new lineages that are equated to two new species; Fuscoporia ramulicolasp. nov. grouped together with F. ferrea, F. punctatiformis, F. subferrea and F. yunnanensis with a strong support; Fuscoporia acutimarginatasp. nov. formed a strongly supported lineage distinct from other species. The individual morphological characters of the new species and their related species are discussed. A key to Chinese species of Fuscoporia is provided.

Highlights

  • Fuscoporia Murrill (1907) was established based on F. ferruginosa (Schrad.) Murrill

  • Phylogenetic studies based on nuclear large subunit ribosomal RNA-based phylogeny confirmed that Fuscoporia formed a lineage distinct from Phellinus s. s. (Wagner and Fischer 2001, 2002)

  • F. acutimarginata is very similar to F. setifer in having annual, effused-reflexed basidiocarps and the presence of cystidioles, but the latter has bigger pores (3–4 per mm) and smaller basidiospores (5.8–7 × 2–2.5 μm, Dai 2010)

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Summary

Introduction

Fuscoporia Murrill (1907) was established based on F. ferruginosa (Schrad.) Murrill. the genus has been unconsidered for a long time, reduced as a synonym of Phellinus Quél. (e.g., Overholts 1953; Ryvarden and Johansen 1980; Larsen and CobbPoulle 1990). Fiasson and Niemelä (1984) firstly used morphological features to segre-. Phylogenetic studies based on nuclear large subunit (nLSU) ribosomal RNA-based phylogeny confirmed that Fuscoporia formed a lineage distinct from Phellinus s. Previous studies on Fuscoporia were mostly based on morphological characteristics (Groposo et al 2007; Baltazar et al 2009; Baltazar and Gibertoni 2010; Raymundo et al 2013) but, recently, more new taxa were described based on both molecular analyses and morphology (Niemelä et al 2001; Jang et al 2012; Pires et al 2015; Chen and Yuan 2017; Chen et al 2019). Phylogenetic analyses were carried out based on the nLSU and combined ITS, nLSU and RPB2 datasets including 99 (60 newly generated) sequences representing 18 species of Fuscoporia. A key to Chinese species in the genus was provided

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