Has Kew ‘tamed the beast’ that is/was genus *Cortinarius*?
Liimatainen, K., Kim, J.T., Pokorny, L. et al. Taming the beast: A revised classification of Cortinariaceae based on genomic data. Fungal Diversity 112, 89–170 (2022).
- Cortinarius is the last genus supported in Cortinariaceae, and largest in Agaricales: 5000[?] taxa in Species Fungorum in 2021, 172 sections defined in recent studies.
- Time for a split?
- Targeted capture sequencing, first time for Basidiomycetes, and shallow whole genome sequencing.
- 75 single-copy genes from 19 species (for backbone tree), wider 5-locus (RPB1, RPB2, MCM7, GPD, and TEF1) analysis of 245 species (for primary phylogenetic tree). Interestingly, ITS is not used.
- In both trees, many of the clades are strongly supported, but some supports are weaker, particularly as you move down the trees.
- Suggested split into ten genera: Cortinarius (s.s.), Phlegmacium, Thaxterogaster, Calonarius, Aureonarius, Cystinarius, Volvanarius, Hygronarius, Mystinarius, and Austrocortinarius. Seven new genera, lots of new subgenera and sections.
- A few genera still dominate, especially Cortinarius (s.s.) with more than 2000 species, and Cortinarius Subg. Telamonia still has 80 sections.
- Now I'm wondering when it will be (broadly) accepted and how much impact will it have on identification for different purposes?
https://link.springer.com/article/10.1007/s13225-022-00499-9
Nice discussion: https://karl.soop.se/KS60_JEC22_Eng.pdf
Observations
Photos / Sounds
What
Pelargonium Webcap (Cortinarius flabellus)Observer
shelbourneDescription
Dark brown basidiocarps, growing in mixed decidous woodland. Pileus is smooth with acute umbo, strong white ring and scales on lower stipe.
Photos / Sounds
What
Cortinarius Subg. Telamonia (Subgenus Telamonia)Observer
shelbourneDescription
Mixed deciduous woodland, predominantly Quercus robur and Betula pendula. Rusty brown spore deposit. Also considered Naucoria, but Cortinarius (sl) seems to fit better. Seems like Telamonia or Phelgmacium.
Photos / Sounds
What
Cortinarius Sect. Dermocybe (Section Dermocybe)Observer
shelbourneDescription
100s of basidiocarps trooping in a damp and shady clearing in mixed deciduous woodland, predominantly Betula pendula and Quercus robur. Odour mildy raphanoid; pileus varying shades of brown, mildly hygrophanous, campanulate, becoming ruffled and almost concave, retaining umbo in slight depression, striate and mildly radially-rimose with age, fine and lighter radial fibrils noticeable on drying; gills adnate, average spacing, strong rusty-orange with age, slightly darker on the edges; stipe cylindrical with slightly swollen base, whitish ring area, lighter yellowish above, and brownish below with dark fibrils.
Macroscopic features comparable with C. cinnamomeous and maybe C. uliginosus, gills do not seem red enough for C. semianguineus.
Photos / Sounds
What
Sepia Webcap (Cortinarius decipiens)Observer
shelbourneDescription
Around 50 basidiocarps growing terrestrially in damp area of mixed deciduous woodland, predominantly Betula pendula and Quercus robur. Odour faintly raphanoid; pileus vinaceous with distinct whitish and uneven margin, conical to campanulate and becoming broadly convex retaining umbo, faint striations, and some velar remnants at edges; gills narrowly sinuate, slightly crowded, initially lighter yellowish-buff going to dark rusty-orange; stipe cylindrical, sometimes slightly swollen at base, whitish-grey, longitudinal fibrils, indistinct white ring zone, noticeably violaceous above.
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