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DOI: http://dx.doi.org/10.11646/phytotaxa.219.1.3

Redescription of Clitocybe umbrinopurpurascens (Basidiomycota, Agaricales) and revision of Neohygrophorus and Pseudoomphalina

Carmine Lavorato, Alfredo Vizzini, Zai-Wei Ge, Marco Contu

Abstract


Clitocybe umbrinopurpurascens, a rare species thus far known only from Morocco, is redescribed based on fresh collections made in Calabria (South Italy). Photographs of fresh material and drawings of the main micromorphological features of the species are provided. The type collection, in poor condition and not suitable for molecular analysis, was restudied macro- and micromorphologically and was found fully identical with the collections from Calabria. Based on molecular data, this species  belongs to the genus Pseudoomphalina (type Omphalia kalchbrenneri) and the genus Neohygrophorus is treated as a synonym of Pseudoomphalina. A collection from Calabria is chosen as an epitype for P. umbrinopurpurascens. Our morphological and molecular revision of other Pseudoomphalina species did not provide evidence supporting the placement of  Agaricus pachyphyllus in Pseudomphalina, or any other of the allied genera, therefore, for this species the new genus Pseudolaccaria is introduced. As there are no extant original herbarium specimens, a lectotype and epitype for Omphalia kalchbrenneri and a neotype for Agaricus pachyphyllus are designated.


Keywords


Agaricomycetes, tricholomatoid clade, amyloid spores, ITS and nucLSU sequences, taxonomy, Fungi, Italy

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