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| We studied the taxonomy of Pluteus insidiosus and similar species using morphological and
molecular (nrITS, TEF1-a) data, including a detailed study of the type collection of P. insidiosus. Based
on our results, we recognize five species in this group: P. insidiosus sensu stricto and four other taxa:
P. assimilatus; P. farensis; P. flavostipitatus; and P. pseudoinsidiosus; described here as new. All these taxa
are distinct from each other based on molecular data, but some of them are semi-cryptic based on
morphology and co-occur in the Palaearctic region. An additional molecular lineage, phylogenetically
separates from the P. insidiosus complex, but with many morphological similarities, was recognized
in the molecular phylogenies. Based on the revision of available type collections, the name Pluteus
reisneri Velen., was adopted for this Clade. Pluteus reisneri was validly published in 1921, but it has
barely been used since its original description. A modern epitype, with molecular data, was selected
for P. reisneri. | |
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