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Lactarius volemus (Russulaceae, Russulales), from a traditional morphological species to a world-wide species complex

Boekbijdrage - Boekhoofdstuk Conferentiebijdrage

Ondertitel:Lactarius volemus (Russulales) : de l’espèce morphologique traditionnelle à un complexe mondial d’espèces.
Fungal species have been mainly diagnosed by their morphological characteristics up to the middle of the 20th century. Starting from the 1960s and 1970s, the application of DNA-based methods ushered in a new era of species delimitation. Numerous genetically isolated clusters within many of the traditional morphological species have now been revealed and previous taxonomic insights became perturbed. Lactifluus volemus (Fr.: Fr.) Kuntze is such a traditional morphological species. It has been described from Sweden by Fries in 1821. Since then, however, the name has been applied for morphological look-alikes in Guatemala, Mexico, eastern North America and Asia, where it forms ectomycorrhiza in both deciduous and coniferous forests. Is Fries’ L. volemus indeed such a widespread species? Or is it in fact a complex of different species with limited geographical distributions? If L. volemus represent a species complex, are these different species cryptic or pseudo-cryptic? We summarize and discuss several recent morphological and molecular phylogenetic findings confirming that L. volemus represents a species complex and that at least some of these species are pseudo-cryptic.
Boek: Russulales 2010, Proceedings
Volume: 51
Pagina's: 152 - 161
Jaar van publicatie:2013