XVI International Botanical Congess

The nrDNA ITS of 27 species representing seven subgenera of the large ectomycorrhizal genus Cortinarius, as well as Rozites caperatus and the outgroup Gymnopilus sapineus, were sequenced and subjected to parsimony analyses. Different gap treatments yielded from 9 to 37 most parsimonious trees. Two major evolutionary lineages were observed: (1) the subgenera Dermocybe, Cortinarius, Myxacium, Phlegmacium, Leprocybe (pro parte), C. anomalus (Sericeocybe), C. obtusus (Telamonia) as well as R. caperatus, (2) Sericeocybe (pro parte), C. gentilis (Leprocybe), C. californicus (Dermocybe), and Telamonia except C. obtusus. Our study also suggest that: (3) C. californicus belong to Telamonia, (4) Rozites may be included in Cortinarius, (5) the subgenera Leprocybe and Sericeocybe are not supported.