During an investigation into parasitic fungi on arthropods in the mixed forests of Mt. Fruška Gora, Republic of Serbia, two pathogenic species were found: Cordyceps thaxteri Mains (anamorph: Akanthomyces aranearum (Petch) Mains) and Torrubiella arachnophila (J.R. Johnst.) Mains (anamorph: Gibellula leiopus (Vuill. ex Maubl.) Mains (Hypocreales, Cordycipitaceae). Both specimens were found in the anamorphic (asexual) stage. Previously, there have been no investigations of this group of fungi in this region, thus these are the first records of pathogenic fungi for both Mt. Fruška Gora and the entire territory of the Republic of Serbia. Collected specimens are deposited in the Herbarium of the National Park Fruška Gora, Republic of Serbia.

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Saprotrophic basidiomycetes play a crucial role in leaf-litter decomposition, especially in nitrogen-limited boreal and temperate forests. Populations of this group of fungi have been inadequately investigated. We examined the populations of three different saprotrophic species (Mycetinis alliaceus, Marasmius rotula and Gymnopus androsaceus) in forests in Serbia and Montenegro. To determine the distribution of genets at each of the three investigated sites, molecular analysis was conducted using the inter-simple sequence repeats (ISSR) method. Seven to fifteen genets (genotypes, individuals) were identified on each site and the majority of them were represented by a single sporocarp. The sizes of the genets with two or more sporocarps were estimated to range from 0.3 to 4.0 m. Results obtained in this study suggest that populations of these three species can consist of numerous and relatively small genets.