Clathrus archeri (Phallales, Basidiomycota) was considered a rare fungus in Ukraine. Therefore, it was included in the Red Data Book of Ukraine (3 rd edition, 2009) as an endangered species with a disjunctive range. However, the authors collected new information on its distribution to demonstrate that the species is a common fungus in four regions of Ukraine, namely Chernivtsi, Ivano-Frankivsk, Lviv, and Transcarpathian regions. Clathrus archeri occurs in disturbed plant communities which remain under the influence of human activities (cutting down trees, roads, grazing, etc.) and contain large amounts of organic matter, such as wood shavings, sawdust, branches, leaves, dry grass, and dead wood. In the above regions, every year a number of the fungus localities increases and penetration of this fungus into anthropogenic plant communities such as gardens, kitchen gardens, young plantations of common oak and red oak is observed. Undoubtedly, C. archeri is an invasive alien species. Moreover, the fungus aggressively invades natural and anthropogenically altered plant communities of the Carpathians and nearby territories. Consequently, it is concluded that the species is erroneously listed in the Red Data Book of Ukraine. Further distribution of the fungus can pose a threat to native plant communities of the Carpathians and adjacent regions. It is emphasized that any reproduction of this species in vitro following by its introduction into the ecosystems of Ukraine is unacceptable. Such intrusion into the mycobiota of Ukraine can become dangerous and lead to unexpectedely harmful and uncontrollable effects. Clathrus archeri should be excluded from the Red Data Book of Ukraine as an alien and invasive species.

Чорноморський ботанічний журнал -том 3, №2 (2007) Information about biology of Anthurus archeri (Berk.) E. Fisch. (Clathraceae, Basidiomycota), an invasive fungus from Australasia, which is widely naturalized in Europe, is given for Ukraine. A. archeri was found in Ukrainian part of Carpathian Mts. in deciduous forests on places rich of organic matter.

The present article reports the first for Ukraine records of a noncoprophilous species of the genus Thecotheus, T. rivicola (Ascomycota, Pezizales). This species was observed on watersoaked wood in two National Nature Parks of Ukraine, Kremenetsky Hory (Ternopil Region) and Cheremoskiy (Chernivtsi Region). Brief description, locality and original illustrations of the collected samples are provided. Species diversity and distribution of the genus Thecotheus in Ukraine are discussed.

As a result of mycological research 290 species of fungi from various systematic groups belonging to the Ascomycota and Basidiomycota were recorded on the territory of the Male Polissia National Nature Park. The powdery mildews and discomycetes (55 and 15 species, respectively) dominated among the recorded Ascomycota. The agaricoid (120 species), aphyllophoroid (36 species), boletoid (19 species) and the rust fungi (9 species) prevailed among Basidiomycota. Of the identified species, 289 are first noted for the park, 56 species are new for Central Polissia; 42 species are new for Polissia; eight species (Clitocybe sinopica, Conocybe ambiqua, Cortinarius decipiens, Entoloma graphitipes, Galerina hybrida, Lactarius scoticus, Russula aquosa and R. betularum) and one variety (Cortinarius flexipes var. flabellus) were first recorded for Ukraine. New localities of the two species listed in the Red Data Book of Ukraine, i.e. Grifola frondosa and Pseudoboletus parasiticus were noted within the park. Some macromycetes, which are rare or relatively rare in Ukraine, are also found (Amylocorticium canadense, Conocybe subxerophytica var. brunnea, Cortinarius diasemospermus, C. flexipes var. flexipes, Entoloma rhodocalix, Flammulaster muricatus, Galerina atkinsoniana, G. norvegica, Lachnella alboviolascens, Melanoleuca microcephala, Mycena niveipes, and M. viridimarginata). Among the powdery mildews Erysiphe lycopsidis, E. mayorii, E. penicillata, E. urticae, Golovinomyces circumfusus, Phyllactinia alnicola, Podosphaera epilobii, P. major and P. myrtillina are relatively rare. The record of the rust fungus Kuehneola uredinis is the easternmost in Ukraine. The relatively rare discomycetes comprise Ascobolus carbonarius, Coccomyces tumidus, Leotia lubrica, Mollisia olivascens, and Scutellinia crinita. Some rare species have also been found among the fungicolous fungi, such as Fusicolla merismoides, Hypomyces luteovirens and Tomentella ellisii. The work contains a list of all species of fungi recorded in the Male Polissia National Nature Park during this study.

The article provides current information on distribution patterns of six species of aphyllophoroid fungi (Agaricomycetes, Basidiomycota) listed in the Red Data Book of Ukraine: Clavariadelphus pistillaris, Gomphus clavatus, Hericium coralloides, Picipes rhizophilus, Polyporus umbellatus, and Sparassis crispa. Altogether, about 500 occurrences of the fungal fruitbodies in the country are reported. Of them, over 410 recent observations have been added to those published in the Red Data Book of Ukraine in 2009. Majority of that data has been provided over the last few years via mushroom citizen science, i.e. involvement of volunteers in collecting distribution data for macrofungi with large and distinctive fruitbodies. Only specialist-verified observations were included in the datasets reported in the article. The compiled data will serve as a considerably improved basis for future re-assessments of the conservation status of these threatened species for the next edition of the Red Data Book of Ukraine.