Boris Assyov

Checklist of the larger basidiomycetes in Bulgaria

A comprehensive checklist of the species of larger basidiomycetes in Bulgaria does not exist. The checklist provided herein is the first attempt to fill that gap. It provides a compilation of the available data on the larger basidiomycetes reported from, or known to occur in Bulgaria. An alphabetical list of accepted names of fungi, recognized as occurring in Bulgaria, is given. For each taxon, the distribution in Bulgaria is presented. Unpublished records about the distribution of some species are also added. The total number of the correct names of species is 1537. An index of synonyms based on literature records from Bulgaria is appended. It includes 1020 species and infraspecific taxa. A list of excluded records of 157 species, with reasons for their exclusion, is also given.

New Bulgarian records of fungi associated with glacial relict plants

The paper contributes to knowledge of Bulgarian fungal diversity on glacial relict vascular plants. Eleven new country records of ascomycetes and anamorphic fungi are presented with descriptions, namely Asteromella silvarum, Cainiella johansonii, Gnomoniella vagans, Hendersonia culmicola, Leptosphaerulina dryadis, Melasmia mougeotii, Phaeosphaeria nardi, Pseudomassaria islandica, Septoria macropoda, S. tenella, and Sydowiella dryadis. Microbotryum silenes-acaulis is also an addition to the list reflecting the recent changes in M. violaceum s. lat. New data are included about the distribution of Leptosphaeria doliolum, Nodulosphaeria modesta, Ophiognomonia gei-montani, and Phaeosphaeria juncina, all previously recorded in Bulgaria. In addition, a brief review is presented of previously encountered fungal species on glacial relicts in the country.

Diversity of Chroogomphus (Gomphidiaceae, Boletales) in Europe, and typification of C. rutilus

In this study, eight species of Chroogomphus are recognized from Europe: C. britannicus, C. aff. filiformis 1, C. fulmineus, C. cf. helveticus, C. mediterraneus, C. cf. purpurascens, C. rutilus, and C. subfulmineus. Different candidates for the application of the name C. rutilus are evaluated and the best fit to the description is selected; lecto- and epitypes are chosen to fix the name. Chroogomphus fulmineus and C. mediterraneus are also epitypified and a new species, C. subfulmineus, is described. The infrageneric classification is revised and a new subgenus Siccigomphus and three new sections, Confusi, Filiformes, and Fulminei are introduced. The former sections Chroogomphus and Floccigomphus are elevated to subgeneric level. Comparison of the ITS regions (nuc rDNA ITS1-5.8S-ITS2) of all species studied shows that there is a minimum interspecific difference of 1.5 %, with the exception of the two species belonging to sect. Fulminei which differ by a minimum of 0.9 %. Ecological specimen data indicate that species of Chroogomphus form basidiomes under members of Pinaceae, with a general preference for species of Pinus. Five European species have been recorded under Picea, while Abies and Larix have also been recorded as tree associates, although the detailed nutritional relationships of the genus, involving other suilloid fungi in particular, have yet to be fully clarified.