Phylogeography and taxonomy of Pluteus section Pluteus (Basidiomycota, Agaricales) in the Northern Hemisphere
A. JUSTO (1), E. Malysheva (2), T. Bulyonkova (2), E. C. Vellinga (3), G. Cobian (3), N. Nguyen (3), A. M. Minnis (4), D. S. Hibbett (1). (1) Clark University, Worcester, MA, U.S.A.; (2) Komarov Botanical Institute RAS, St. Petersburg, Russia; (3) University of California-Berkeley, Berkeley, CA, U.S.A.; (4) Biological and Environmental Influences on Forest Health and Productivity (USDA), Ma
The diversity and biogeography of <i>Pluteus cervinus</i> (the deer mushroom) and allied species was investigated using molecular data. Over 300 specimens spanning the major areas of boreal and temperate forests of the Northern Hemisphere were studied and nrITS and tef1-alpha were obtained. A considerable effort was made to locate, study and sequence type collections in order to stabilize the taxonomy of the group. A total of 26 species occurring in Eurasia and North America were recovered in the phylogenetic analyses, 16 of which represent new taxa. The problems for morphological delimitation of the species and the different resolution power of ITS vs. tef1-alpha will be discussed. Phylogeographic patterns are strikingly different among the species in this clade and all taxa except <i>Pluteus petasatus</i> seem to have some geographic and/or ecological limit in their distribution. Relatively restricted endemics occur throughout the area of study but Western North America and the boreal and (sub) alpine areas of Eurasia and North America seem to be particularly rich in number of species.
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