Publication Date:
2024-03-06
Description:
Russula subgenus Compactae is a group of ectomycorrhizal basidiomycetes, usually with large pileate
\nfruitbodies. European members of the group are characterised by the absence of bright colours on the surfaces of
\ntheir pilei, the context turning grey to black after cutting, the abundance of short lamellulae in the hymenophore, and
\nspores with an inamyloid suprahilar spot and with low reticulate ornamentation. Our multi-locus phylogenetic study
\nconfirmed that this morphological delimitation corresponds to a well-supported clade. Within this clade, 16 species
\nare recognised in Europe, of which five belong to the R. albonigra lineage and were described in a previous study,
\nwhile eleven are fully described in this study. The application of the names R. acrifolia, R. adusta, R. anthracina,
\nR. atramentosa, R. densissima, R. nigricans and R. roseonigra is based on the position of sequences retrieved from
\ntypes or authentic material. Based on type sequences, R. fuliginosa is synonymised with R. anthracina and two
\nvarieties of R. anthracina are considered synonyms of R. atramentosa. The application of the name R. densifolia
\nis based on a morphological match with the traditional species interpretation and the neotype specimen. Three
\nspecies are described as new, R. marxmuelleriana sp. nov., R. picrophylla sp. nov. and R. thuringiaca sp. nov. This
\nstudy recognises three major lineages and two species with isolated positions within the European Compactae
\nand a morphological barcode was assigned to the species using an analysis of 23 selected characters. A search of
\npublicly available sequences from the UNITE database revealed that the majority of species are host tree generalists and widely distributed in temperate and Mediterranean areas of Europe. Russula adusta is the only species so
\nfar proven to form ectomycorrhiza exclusively with conifers.
Keywords:
barcode
;
Basidiomycota
;
coalescent species delimitation
;
diversity
;
ectomycorrhiza
;
Fungi
;
integrative taxonomy
;
new taxa
;
phylogeny
Repository Name:
National Museum of Natural History, Netherlands
Type:
info:eu-repo/semantics/article
Format:
application/pdf
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