Figure 3

Phylogeny of the section Calochroi as derived from ML analysis of an alignment of ITS-5.8S + D1/D2 (except for C. dalecarlicus ) + RPB1 A-C sequences. Numbers above nodes are ML bootstrap values, numbers below nodes are MP bootstrap values (values < 50% not shown) from 1000 replicates, respectively. Distributions of basidiome pigments were retrieved from [7, 9, 10, 64] and are abbreviated as follows. Flavomannin pigments: ATR = atrovirin, FDM = flavomannin-6-6'dimethylether, 4-OH-FDM = 4-OH-flavomannin-6,6'-dimethylether, FLA = flavomannin, FTM = flavomannin-6,6',8-trimethylether; phlegmacin pigments: LRU = leucorufoolivacins, PHL = phlegmacin, PME B₂ = phlegmacin-8'-methylether B₂; triterpenoid pigments: S = sodagnitins A-F. Note that FDM is a common pigment found also in other groups in Cortinarius. A non-coding 8 bp insertion is absent in all species of the Calochroi clade and also in C. elegantissimus and C. rapaceotomentosus, but is present in the remaining species. The alignment shown includes all species of the Calochroi clade contained in the combined dataset 3 (framed box), and corresponds to positions 769–777 of intron 2 of the RPB1 sequence. Ancestral character states were reconstructed using maximum parsimony (DELTRAN strategy). Green branches indicate taxa of bright colours; taxa with abruptly marginate to flattened stipe bulbs are indicated by bold lines. Dashed branches indicate taxa where bright basidiome colours or marginate to flattened stipe bulbs are not continuously present in the populations. C. elegantior and C. humolens photos, credit: F. Röger.