Abstract
Cortinarius is an important ectomycorrhizal genus that forms a symbiotic relationship with certain trees, shrubs and herbs. Recently, we began studying Cortinarius in China and here we describe three new species of Cortinarius subg. Telamonia based on morphological and ecological characteristics, together with phylogenetic analyses. Cortinarius laccariphyllussp. nov. (section Colymbadini) is associated with broadleaf trees, with strongly hygrophanous basidiomata, special Laccaria-like lamellae and white and extremely sparse universal veil. Cortinarius neotorvussp. nov. (section Telamonia) is associated with broadleaf trees and is easily confused with C. torvus, but can be distinguished by the colour of the fresh basidiomes and the stipe usually somewhat tapering towards the base. Cortinarius subfuscoperonatussp. nov. (section Fuscoperonati) is associated with coniferous trees, with subglobose to broadly ellipsoid spores and is closely related to C. fuscoperonatus. A key to the new species and similar species in sections Colymbadini, Telamonia and Fuscoperonati is provided.
Highlights
Cortinarius (Pers.) Gray is one of the most species-rich agaric genera, with reportedly more than 2250 species worldwide (He et al 2019)
While most of the Cortinarius species were described from Europe and North America, there are some species described from Oceania (e.g. Bougher and Hilton 1989; Soop 2005; Gasparini and Soop 2008), South America (e.g. Valenzuela and Esteve-Raventos 1994; Garnica et al 2003; San-Fabian et al 2018) and Asia (e.g. Miyauchi 2001; Peintner et al 2003; Xie et al 2019)
The Maximum Likelihood (ML) tree was selected as the representative phylogeny (Fig. 1)
Summary
Cortinarius (Pers.) Gray is one of the most species-rich agaric genera, with reportedly more than 2250 species worldwide (He et al 2019). While most of the Cortinarius species were described from Europe and North America, there are some species described from Oceania It was assumed that more than 900 species occur in northern European countries, based on phylogenetic studies (Niskanen et al 2012). At least 500 Cortinarius species were reported in North America (Bessette et al 1997). 229 Cortinarius species have been reported in China (Teng 1963; Tai 1979; Shao and Xiang 1997; Wei and Yao 2013; Li et al 2015; Xie 2018; Xie et al 2019; Cheng et al 2019; Wei and Liu 2019). Many studies showed that nrDNA ITS barcodes are typically effective in distinguishing Cortinarius species (e.g. Liimatainen et al 2014; Garnica et al 2016; Schmidt-Stohn et al 2017; Brandrud et al 2018b)
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