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In recent years, there has been an apparent Europe-wide emerging presence of brown spot needle blight, a disease of pine species caused by the fungus Lecanosticta acicola. In this study, we report ...

Species of Russula are ubiquitous members of ectomycorrhizal fungal communities in tropical ecosystems. However, an important part of the total tropical diversity of this genus and its biogeographic patterns is unknown due to the lack of studies on Russula in tropical ecosystems. We combined molecular, morphological, ecological, and biogeographic data to elaborate concepts for two new subspecies of R. floriformis (subsection Substriatinae). Russula floriformis subsp. floriformis and R. floriformis subsp. symphoniae are described as new from montane forest dominated by Quercus and/or Oreomunnea (Fagales) from Colombia and Panama, respectively. Phylogenies were constructed using nuc rDNA internal transcribed spacer region ITS1-5.8S-ITS2 (ITS), D1-D2 domains of nuc 28S rDNA (28S), and partial regions of the second largest subunit of RNA polymerase II (rpb2) and translation elongation factor 1-alpha (tef1). Similar environmental conditions, similar morphology, and an ITS sequence similarity higher than 99% with only three different positions indicate that these two subspecies are closely related. Detailed observations of microscopic structures and analyses of further DNA loci, however, revealed morphological and molecular characteristics that allow distinguishing the two subspecies of R. floriformis. Spatial distribution and phylogenetic proximity of the two Russula subspecies and their ectomycorrhizal hosts, i.e., species of Quercus, suggest that their diversification is a result of comigration, adaptation, and geographic isolation along the Isthmus of Panama during the Pliocene and Pleistocene.

Mulching (cutting of vegetation without removal of clippings) is used as a low-cost method for maintaining remote or abandoned grasslands in Slovakia. The likely consequence of mulching is seasonal nutrient enrichment resulting from decomposition of plant litter by saprotrophic organisms. The potential changes in biodiversity of the ecosystem caused by long-term application of mulching are to date only very poorly understood. In order to examine the impact of mulching on soil mycobiota, we compared six different grassland management regimes applied over nine years on a sub-montane oligotrophic Nardus pasture in the Central Slovakia. The diversity of soil fungi was assessed using DNA metabarcoding of the ITS2 regions of the nrRNA locus performed by Illumina MiSeq. We focused on a particular group of macrofungi which is characteristic of traditionally managed and undisturbed European grasslands, and which are often the dominant soil fungi in these habitats. These are collectively known as CHEGD fungi (the acronym of the constituent taxa: Clavariaceae, Hygrophoraceae, Entolomataceae, Geoglossaceae and Dermoloma). We compared the relative abundance and diversity of CHEGD fungi with the total fungal and plant diversity. CHEGD fungi were dominant across all management treatments. Although there were no statistical effects of treatments on total fungal richness and diversity, CHEGD fungi and vascular plants diversity and richness were lower on plots where mulching or no management were imposed, suggesting that such management regimes would have a negative impact on grassland fungi. However, no single treatment covered the total CHEGD diversity of the study, indicating that the localized use of mulching in addition to traditional managements can enhance overall diversity of grasslands in the area. Our results also suggest that the impact of mulching depends on the season when the grassland is mulched and it might be reduced by combination with other management treatments. The high relative abundance and sensitivity of CHEDG fungi in oligotrophic grasslands to management treatments makes them excellent indicators of grassland natural quality and is consistent with the ecological importance of this fungal group.

We present the first phylogenetic evaluation of the genus Dermoloma, which is resolved as monophyletic and closely related to Pseudotricholoma, a poorly known Dermoloma-like lineage within the family Tricholomataceae. The position of Dermoloma is confirmed by the placement of the type species, Dermoloma cuneifolium, represented by multiple samples including the neotype. Based on our phylogenetic analyses, we recognised 25 European operational taxonomic units (OTUs) but could only assign species names to ten of them based on ex-type sequences. Furthermore, only five additional published Dermoloma names of uncertain status are available for the remaining 16 potential European species, thus demonstrating an unexpected amount of taxonomic diversity. Samples from Europe and North America seem to be endemic on a continental scale. North American samples formed six unique OTUs, but only one could be reliably named, Dermoloma hymenocephalum. Dermoloma is morphologically defined by basidiomata with brown, grey and white colours with a farinaceous odour and a pluristratous hymeniderm type of pileipellis. Our phylogenetic analyses support the subdivision of the genus into two subgenera and four sections, and species with inamyloid basidiospores are placed in subg. Dermoloma and those with amyloid basidiospores in subg. Amylospora. Both subgenera are further divided into two sections. The analysis of spore morphology shows that sect. Conica of subg. Dermoloma and sect. Nigrescentia of subg. Amylospora have a very distinctive spore shape. Sect. Atrobrunnea of subg. Amylospora showed relatively high variability of spores among species, but spores of sect. Dermoloma were similar and not useful for species discrimination.

This study evaluates the morphological concept of Crepidotus variabilis and similar taxa based on basidiospore and cheilocystidia characters. A phylogenetic analysis of the ITS region clearly distinguished C. variabilis var. variabilis from the two other distinct taxa of the same lineage, C. variabilis var. trichocystis and C. neotrichocystis. We also recognised one additional morphologically similar and undescribed species that belongs to the C. variabilis lineage. All four taxa can also be recognised morphologically using basidiospore and cheilocystidia characters. Our detailed statistical comparison of these characters improves the knowledge of their variability and specifies more precisely the morphological circumscription of the taxa within this group.

Russula albonigra is considered a well-known species, morphologically delimited by the context of the basidiomata blackening without intermediate reddening, and the menthol-cooling taste of the lamellae. It is supposed to have a broad ecological range and a large distribution area. A thorough molecular analysis based on four nuclear markers (ITS, LSU, RPB2 and TEF1-α) shows this traditional concept of R. albonigra s. lat. represents a species complex consisting of at least five European, three North American, and one Chinese species. Morphological study shows traditional characters used to delimit R. albonigra are not always reliable. Therefore, a new delimitation of the R. albonigra complex is proposed and a key to the described European species of R. subgen. Compactae is presented. A lectotype and an epitype are designated for R. albonigra and three new European species are described: R. ambusta, R. nigrifacta, and R. ustulata. Different thresholds of UNITE species hypotheses were tested against the taxonomic data. The distance threshold of 0.5% gives a perfect match to the phylogenetically defined species within the R. albonigra complex. Publicly available sequence data can contribute to species delimitation and increase our knowledge on ecology and distribution, but the pitfalls are short and low quality sequences.

The study deals with the last unexplored morphological group of the genus Hodophilus defined by absence of distinct odours, absence of yellow colours and absence of darker dots on the stipe. The phylogenetic reconstruction of the whole genus based on nrITS, nrLSU and RPB2 sequences placed all European members having these morphological characters in a monophyletic group defined here as a new section H. sect. Phaeophylli. The remaining European members of the genus are placed in two additional groups classified as section H. sect. Hodophilus and the new section H. sect. Micacei. Five species are recognised within section Phaeophylli which is typified by H. phaeophyllus that is lecto- and epitypified. Three new species belonging to this section are described: H. carpathicus, H. decurrentior and H. stramineus. Hodophilus decurrentior is the only species showing distinct morphological differences under the microscope. The identification of other species of the section depends mainly on the colour of basidiomata. An updated key to all European members of the genus is provided.

Since 2007, the quality of Russula descriptions has improved and the use of molecular support for species delimitation and the number of published new species has increased. However, the description style is not consistent and has regional or author-specific patterns. Most recent publications still favour descriptions of spores compared to hymenium and pileipellis elements, and usually only the spore size is provided with statistical support. This study proposes standards for descriptions of the microscopic structure of Russula species (Russulaceae, Agaricomycetes). We present the description template, the template measurements table, the specific terminology and the essential chemical reagents. The proposed standards were tested by mycologists from 11 countries who met at the Russula Microscopy Workshop in Slovakia. Descriptions of 26 species from 9 countries and four continents were prepared, among them R. amarissima, R. castanopsidis, R. seperina and R. subtilis are re-described and 15 species are introduced as new: R. abietiphila, R. amerorecondita, R. aurantioflava, R. echidna, R. flavobrunnescens, R. fluvialis, R. fortunae, R. garyensis, R. gemmata, R. laevis, R. madrensis, R. olivaceohimalayensis, R. purpureogracilis, R. sancti-pauli and R. wielangtae. Seven descriptions for candidate new species are provided without a formal name assignment. Pairwise comparison of species described in this study with available similar descriptions of related species suggests that microscopic characters from all parts of the basidiomata can be equally important for species recognition and they deserve the same treatment including number of measurements and statistics. The majority of recent studies does not recognise differences between the pileus margin and centre, but more than one-third of the species described in this study show distinct differences between the pileus areas, emphasizing the importance to specify the origin of pileipellis observations. This study proved that there is frequently insufficient difference in the ITS barcode between closely related species and that it is necessary to use more genetic markers combined with ecological and geographical data. © 2019, School of Science.

Supplementary Table S1. Specimens and GenBank accession numbers of DNA sequences used in the phylogenetic analysis. All sequences of R. ayubiana were produced in this study.

Russula subsect. Maculatinae is morphologically and phylogenetically well-defined lineage of ectomycorrhizal fungi associated with arctic, boreal, temperate and Mediterranean habitats of Northern Hemisphere. Based on phylogenetic distance among species, it seems that this group diversified relatively recently. Russula ayubiana sp. nov., described in this study, is the fifth in the group known from relatively small area of northern Pakistan situated in southwestern Himalayas. This is the highest known number of agaric lineage members from a single area in the world. This study uses available data about phylogeny, ecology, and climate to trace phylogenetic origin and ecological preferences of Maculatinae in southwestern Himalayas. Our results suggest that the area has been recently colonised by Maculatinae members migrating from various geographical areas and adapting to local conditions. We also discuss the perspectives and obstacles in research of biogeography and ecology, and we propose improvements that would facilitate the integration of ecological and biogeographical metadata from the future taxonomic studies of fungi in the region.

Russula albonigra is considered a well-known species, morphologically delimited by the context of the basidiomata that is blackening without intermediate reddening, and the menthol-cooling taste of the lamellae. It is supposed to have a broad ecological amplitude and a large distribution area. A thorough molecular analysis based on four nuclear markers (ITS, LSU, RPB2 and TEF1-α) shows this traditional concept of R. albonigra s.l. represents a species complex consisting of at least five European, three North-American and one Chinese species. Morphological study shows traditional characters used to delimit R. albonigra are not always reliable. Therefore, a new delimitation of the R. albonigra lineage is proposed and a key to the described European species of R. subg. Compactae is presented. A lectotype and an epitype are designated for R. albonigra and three new European species are described: R. ambusta, R. nigrifacta and R. ustulata. UNITE species hypotheses at different thresholds were tested against the taxonomic data. The species hypotheses at the similarity threshold 0.5% give a perfect match to the phylogenetically defined species within the R. albonigra lineage. Publicly available sequence data can contribute to species delimitation and expand knowledge on ecology and distribution, but the pitfalls are short and low quality sequences. The importance of updating public taxonomic data and using correct sequence similarity thresholds is emphasised.

Russula subsection Amoeninae is morphologically defined by a dry velvety pileus surface, a complete absence of cystidia with heteromorphous contents in all tissues, and spores without amyloid suprahilar spot. Thirty-four species within subsection Amoeninae have been published worldwide. Although most Russula species in South Korea have been assigned European or North American names, recent molecular studies have shown that Russula species from different continents are not conspecific. Therefore, the present study aims to: 1) define which species of Russula subsection Amoeninae occur on each continent using molecular phylogenetic analyses; 2) revise the taxonomy of Korean Amoeninae. The phylogenetic analyses using the internal transcribed spacer (ITS) and multilocus sequences showed that subsection Amoeninae is monophyletic within subgenus Heterophyllidiae section Heterophyllae. A total of 21 Russula subsection Amoeninae species were confirmed from Asia, Australia, Europe, North America, and Central America, and species from different continents formed separate clades. Three species were recognized from South Korea and were clearly separated from the European and North American species. These species are R. bella, also reported from Japan, a new species described herein, Russula orientipurpurea, and a new species undescribed due to insufficient material.

We present the first phylogenetic evaluation of the genus Dermoloma , which is resolved as monophyletic and closely related to Pseudotricholoma , a poorly-known Dermoloma -like lineage within the family Tricholomataceae. The position of Dermoloma is confirmed by the placement of the type species, D. cuneifolium , represented by multiple samples including the neotype. Based on our phylogenetic analyses, we recognised 25 European operational taxonomic units (OTUs), but could only assign species names to ten of them based on ex-type sequences. Furthermore, only five additional published Dermoloma names of uncertain status are available for the remaining 16 potential European species, thus demonstrating an unexpected amount of taxonomic diversity. Samples from Europe and North America seem to be endemic on a continental scale. North American samples formed six unique OTUs, but only one could be reliably named, D. hymenocephalum . Dermoloma is morphologically defined by basidiomata with brown, grey and white colours with a farinaceous odour and a pluristratous hymeniderm type of pileipellis. Our phylogenetic analyses support the subdivision of the genus into two subgenera and four sections, species with inamyloid basidiospores are placed in subg. Dermoloma and those with amyloid basidiospores in subg. Amylospora . Both subgenera are further divided in two sections. The analysis of spore morphology shows that sect. Conica of subg. Dermoloma and sect. Nigrescentia of subg. Amylospora have a very distinctive spore shape. Sect. Atrobrunnea of subg. Amylospora showed relatively high variability of spores among species, but spores of sect. Dermoloma were similar and not useful for species discrimination.

Phylogenetic reconstruction of Hodophilus species with a yellow colour on the stipe based on nrITS, nrLSU and rpb2 sequences revealed six European species. All these species correspond to the widely accepted European concept of a single species Hodophilus micaceus. Four of these species are described and illustrated. H. micaceus and H. phaeoxanthus are recognised as two separate species and H. albofloccipes as a synonym of the latter. Two species, H. anatinus and H. cambriensis, are described as new. Possible endemism of H. micaceus and H. cambriensis to the British Isles is discussed. All analysed North American samples represent different species to those found in Europe. The North American species Hygrophorus rugulosus is combined in the genus Hodophilus. The preliminary key uses position and development of the yellow colour during maturation as the most important distinguishing character. The presence of the yellow colour is discussed as a possible synapomorphic character.

Dothistroma needle blight (DNB) has been observed in Slovakia during the last two decades. Up until 2017, Dothistroma septosporum has only been detected and molecularly confirmed to cause DNB in Sl...

Among 45 Russula species and infraspecific taxa described by J. Blum, only few are currently accepted. Here we present a case study on R. formosa nom. illeg. (homotypic synonym of R. blumiana), R. decipiens var. ochrospora nom. inval. and R. roseobrunnea. The study is based on sequences and morphological observations of authentic herbarium material determined by J. Blum. The sequence data demonstrate that R. decipiens var. ochrospora is probably identical with the type variety and R. roseobrunnea is probably conspecific with R. rutila. Russula blumiana is recognised and described in detail as a good species related to R. badia.

In this paper, the authors present modern microscopical studies for 28 type specimens of Russula species described by C.H. Peck, thereby completing the revision of all 44 Russula taxa described by this author and for which type specimens were available. Our results suggest that with eventual exception of R. granulata var. lepiotoides (a likely synonym of the type variety) and R. magnifica (a likely synonym of R. polyphylla), all other Russulas described by Peck correspond to well-defined North American taxa. Having been described more than one century ago, Peck's names represent the majority of the earliest described North American Russula species and our type revisions are therefore important both for nomenclatural aspects, as well as typification and identification purposes. All studied taxa are illustrated in detail and accompanied by notes including a short recapitulation of previous type revisions, as well as our own re-evalutation of their systematic position as a result of this study.

Russula is one of the most speciose genera of mushroom-forming fungi, but phylogenetic relationships among species and subgeneric groupings are poorly understood. Our multi-locus phylogenetic reconstruction places R. firmula, R. rubra, R. rutila and R. veternosa in a well-supported Rubrinae clade, belonging to the Integrae clade of the Crown clade of the genus Russula. Traditional morphology-based classifications placed these four species in two different subsections based on the presence or absence of incrustations on pileocystidia. The Integrae clade also contains R. integra and related species that are traditionally placed in other groups based on their mild taste. Ancestral state reconstruction suggests that the common ancestor of the Crown clade and the Integrae clade probably did not have any incrustations in the pileipellis, had a mild taste, yellow spore print and were associated with angiosperms. All four species of the Rubrinae clade are defined by a darker yellow or ochre spore print, acrid taste and incrustations on pileocystidia. This last character contradicts the former splitting of the group because incrustations were apparently overlooked in R. firmula and R. veternosa. Incrustation type is now highlighted as being important for the delimitation of species and groups within the Crown clade. Pink or red staining of the incrustations in sulphovanillin is present in all species of the Rubrinae clade and a majority of the analysed species of the Integrae clade. The delimitation of the Rubrinae clade and its species circumscriptions are summarised here in a new diagnostic key.

Hodophilus atropunctus is traditionally defined as the only species of this genus with dark brown or black dots on the stipe. Multi-locus phylogenetic reconstruction recognised two distinct clades morphologically corresponding to this species concept. The limited morphological description in the protologue of H. atropunctus and absence of a type specimen were limitations in an assignment of this name to one of the recognised phylogenetic species. The emended species concept and the selection of a neotype are based on careful analyses of the colour of the basidiomata and how this changes during maturation and drying. The name H. atropunctus is assigned to the paler of the two species which also shows colour change across the pileus and along the length of the stipe when dry. The second darker species is described here as new, H. variabilipes, but only seven out of 14 collections examined belonging to this taxon had distinct dark coloured dots on the stipe surface.

Numerous lineages of mushroom-forming fungi have been subject to bursts of diversification throughout their evolutionary history, events that can impact our ability to infer well-resolved phylogenies. However, groups that have undergone quick genetic change may have the highest adaptive potential. As the second largest genus of mushroom-forming fungi,Russulaprovides an excellent model for studying hyper-diversification and processes in evolution that drives it. This study focuses on the morphologically defined group –RussulasubsectionRoseinae. Species hypotheses based on morphological differentiation and multi-locus phylogenetic analyses are tested in theRoseinaeusing different applications of the multi-species coalescent model. Based on this combined approach, we recognize fourteen species inRoseinaeincluding the Albida and wholly novel Magnarosea clades. Reconstruction of biogeographic and host association history suggest that parapatric speciation in refugia during glacial cycles of the Pleistocene drove diversification within theRoseinae, which is found to have a Laurasian distribution with an evolutionary origin in the Appalachian Mountains of eastern North America. Finally, we detect jump dispersal at a continental scale that has driven diversification since the most recent glacial cycles.

The Russula globispora lineage is a morphologically and phylogenetically well-defined group of ectomycorrhizal fungi occurring in various climatic areas. In this study we performed a multi-locus phylogenetic study based on collections from boreal, alpine and arctic habitats of Europe and Western North America, subalpine collections from the southeast Himalayas and collections from subtropical coniferous forests of Pakistan. European and North American collections are nearly identical and probably represent a single species named R. dryadicola distributed from the Alps to the Rocky Mountains. Collections from the southeast Himalayas belong to two distinct species: R. abbottabadensis sp. nov. from subtropical monodominant forests of Pinus roxburghii and R. tengii sp. nov. from subalpine mixed forests of Abies and Betula. The results suggest that speciation in this group is driven by a climate disjunction and adaptation rather than a host switch and geographical distance.

The Russula globispora lineage is a morphologically and phylogenetically well-defined group of ectomycorrhizal fungi occurring in various climatic areas. In this study we performed a multi-locus phylogenetic study based on collections from boreal, alpine and arctic habitats of Europe and Western North America, subalpine collections from the southeast Himalayas and collections from subtropical coniferous forests of Pakistan. European and North American collections are nearly identical and probably represent a single species named R. dryadicola distributed from the Alps to the Rocky Mountains. Collections from the southeast Himalayas belong to two distinct species: R. abbottabadensis sp. nov. from subtropical monodominant forests of Pinus roxburghii and R. tengii sp. nov. from subalpine mixed forests of Abies and Betula. The results suggest that speciation in this group is driven by a climate disjunction and adaptation rather than a host switch and geographical distance. Electronic supplementary material The online version of this article (10.1186/s43008-019-0003-9) contains supplementary material, which is available to authorized users.

Two Phyllactinia species have been associated with powdery mildew on leaves of ash trees (Fraxinus) in Eurasia, Phyllactinia fraxinicola U. Braun &amp, H.D. Shin from Southeast Asia and Phyllactinia fraxini (DC.) Fuss from Europe. Non-native ash trees are planted in urban greeneries in both Europe and Southeast Asia, but so far, the two Phyllactinia species have not been reported from the same area. Our molecular analysis of European material consisting of 55 Phyllactinia specimens from 15 countries confirmed the absence of P. fraxinicola in Europe. In Europe, we confirmed P. fraxini on all three European native ash species and on the introduced Asian ash species, Fraxinus. chinensis ssp. Rhynchophylla (Hance) A.E. Murray and Fraxinus mandshurica Rupr, planted in arboreta. Among the 11 collections examined from Southeast Asia, 3 were identified as P. fraxini and 8 as P. fraxinicola. The environmental niches of the two Phyllactinia species do not show significant overlap in the multidimensional space defined by bioclimatic variables. This suggests that the Asian species P. fraxinicola is not adapted to conditions prevailing in most of Europe and does not represent an invasive threat across the continent. Models of the potential distribution of Phyllactinia species do not overlap in Europe, but there are some areas to the northwest that could be susceptible to invasion by P. fraxinicola.

Four European Hodophilus species with an odour similar to naphthalene, a strong unpleasant odour similar to that of mothballs, are recognized based on sequence and/or morphological data. The traditional concept defines Ho. foetens as the only Hodophilus species with a naphthalene odour in Europe. This name is now assigned to one of the studied species based on morphological examination of the holotype specimen. A recently collected specimen is proposed as the epitype. The other three species with a naphthalene odour are described here as new: Ho. pallidus, Ho. subfoetens and Ho. tenuicystidiatus. They are distinguishable in the field based on a combination of lamellae number and colour of basidiomata. All four species are grouped in the Ho. foetens superclade, one of two superclades, together with the Ho. micaceus superclade, in the genus Hodophilus. All are different species from North American taxa with a naphthalene-like odour recognised in a previous study. The Ho. foetens superclade also includes one species identified as Ho. atropunctus that does not have a distinctive odour. The type collection of Ho. albofloccipes, a recently described European species with a naphthalene odour, is placed together with some collections without a distinctive odour in the Ho. micaceus superclade.

Five North American Hodophilus species with naphthalene-like odours are now recognized based on sequence and (or) morphological data and molecular annotation of type collections. Two well-supported eastern North American species do not match any of the studied types and are described here as new: Hodophilus hesleri and Hodophilus smithii. The previously described Hodophilus paupertinus is found to represent an autonomous species and appears restricted to western North America. Hodophilus subfuscescens is found to be an independent lineage in eastern North America. A morphological type study of Hodophilus peckianus shows that it is a distinct species and not represented among recent collections. Multilocus phylogenetic analyses of European and North American material of species with naphthalene odours reveal no species with transatlantic distributions. Overall, Hodophilus comprises two superclades (the Hodophilus foetens superclade and the Hodophilus micaceus superclade) and 16 terminal clades that correspond to phylogenetic species. This study introduces a new approach for morphological delimitation of agaricoid Clavariaceae combining shape and dimensions of particular elements in the pileipellis and caulocystidia. All previously described taxa included in this study, which were previously treated in the genera Hygrophorus, Camarophyllopsis, or Hygrotrama, are formally transferred to Hodophilus.

In September 2011, an international team of cryptogam experts visited seven national nature reserves in five mountain areas of Slovakia: Havesova and Stužica in the Poloniny Mts., Vihorlat in the Vihorlatske vrchyMts., Oblik in the Slanske vrchyMts., Dobrocský prales and Klenovský Vepor in the Veporske vrchy Mts. and Badinsky prales in the Kremnicke vrchy Mts. The reserves were selected to represent examples of the best protected old-growth beech forests in the country. The aim was to study the diversity of wood-inhabiting fungi on fallen beech logs and epiphytic lichens on standing beech trees. In total, 215 fungal species and 128 lichens were recorded on beech wood and bark, and 27 fungi and 26 lichens on additional substrates. The site of the highest conservation value is Stužica with 126 fungi and 79 lichens recorded on beech, of which 12 fungi and 19 lichens are indicators of high nature conservation value. Combined with historical records, a total of 19 non-lichenised fungal indicators are now reported from the site, making it the highest ranked natural beech forest in Europe. The second most important reserve for fungal diversity is Havesova with 121 species, including 14 indicator species recorded on beech wood. For lichens, the second most important reserve is Klenovský Vepor with 69 species including 18 lichen indicators recorded on beech. Nine fungus species are here reported as new to Slovakia: Asterostroma medium, Entoloma hispidulum, E. pseudoparasiticum, Gloeohypochnicium analogum, Hohenbuehelia valesiaca, Hymenochaete ulmicola, Hypocrea parmastoi, Melanomma spiniferum and Scutellinia colensoi. Lichen species Alyxoria ochrocheila is reported as new to Slovakia and Lecanographa amylacea, which was considered extinct in the Slovak Red list, was also recorded. This is the first list of wood-inhabiting fungi and epiphytic lichens of old-growth beech forests in Slovakia, and hence an important contribution to the exploration of biodiversity in Slovakia.

Numerous lineages of mushroom-forming fungi have been subject to bursts of diversification throughout their evolutionary history, events that can impact our ability to infer well-resolved phylogenies. However, groups that have undergone quick genetic change may have the highest adaptive potential. As the second largest genus of mushroom-forming fungi, Russula provides an excellent model for studying hyper-diversification and processes in evolution that drives it. This study focuses on the morphologically defined group - Russula subsection Roseinae. Species hypotheses based on morphological differentiation and multi-locus phylogenetic analyses are tested in the Roseinae using different applications of the multi-species coalescent model. Based on this combined approach, we recognize fourteen species in Roseinae including the Albida and wholly novel Magnarosea clades. Reconstruction of biogeographic and host association history suggest that parapatric speciation in refugia during glacial cycles of the Pleistocene drove diversification within the Roseinae, which is found to have a Laurasian distribution with an evolutionary origin in the Appalachian Mountains of eastern North America. Finally, we detect jump dispersal at a continental scale that has driven diversification since the most recent glacial cycles.

Las nuevas especies de hongos descritas en este estudio incluyen las de varios países de la siguiente manera: Antártida, Apenidiella antarctica de permafrost, Cladosporium fildesense de una esponja marina no identificada. Argentina, Geastrum wrightii sobre humus en bosque mixto. Australia, Golovinomyces glandulariae en Glandularia aristigera, Neoanungitea eucalyptorum en hojas de Eucalyptus grandis, Teratosphaeria corymbiicola en hojas de Corymbia ficifolia, Xylaria eucalypti en hojas de Eucalyptus radiata. Brasil, Bovista psammophila en suelo, Fusarium awaxy en tallos podridos de Zea mays, Geastrum lanuginosum en suelo cubierto de hojarasca, Hermetothecium mikaniae-micranthae (incl. Hermetothecium gen. Nov.) En Mikania micrantha, Penicillium reconvexovelosoi en suelo, Stagonoscciiops de podnacciiopsis de glicina máx. Islas Vírgenes Británicas, Lactifluus guanensis en suelo., Novel species of fungi described in this study include those from various countries as follows: Antarctica , Apenidiella antarctica from permafrost, Cladosporium fildesense from an unidentified marine sponge. Argentina , Geastrum wrightii on humus in mixed forest. Australia , Golovinomyces glandulariae on Glandularia aristigera, Neoanungitea eucalyptorum on leaves of Eucalyptus grandis, Teratosphaeria corymbiicola on leaves of Corymbia ficifolia, Xylaria eucalypti on leaves of Eucalyptus radiata. Brazil , Bovista psammophila on soil, Fusarium awaxy on rotten stalks of Zea mays, Geastrum lanuginosum on leaf litter covered soil, Hermetothecium mikaniae-micranthae (incl. Hermetothecium gen. nov.)on Mikania micrantha, Penicillium reconvexovelosoi in soil, Stagonosporopsis vannaccii from pod of Glycine max. British Virgin Isles, Lactifluus guanensis on soil. Canada , Sorocybe oblongispora on resin of Picea rubens. Chile , Colletotrichum roseum on leaves of Lapageria rosea. China, Setophoma caverna from carbonatite in Karst cave. Colombia , Lareunionomyces eucalypticola on leaves of Eucalyptus grandis. Costa Rica , Psathyrella pivae on wood. Cyprus, Clavulina iris on calcareous substrate. France, Chromosera ambigua and Clavulina iris var. occidentalis on soil. French West Indies, Helminthosphaeria hispidissima on dead wood. Guatemala , Talaromyces guatemalensis in soil. Malaysia, Neotracylla pini (incl. Tracyllales ord. nov. and Neotra- cylla gen. nov.)and Vermiculariopsiella pini on needles of Pinus tecunumanii. New Zealand , Neoconiothyrium viticola on stems of Vitis vinifera, Parafenestella pittospori on Pittosporum tenuifolium, Pilidium novae-zelandiae on Phoenix sp. Pakistan , Russula quercus-floribundae on forest floor. Portugal, Trichoderma aestuarinum from saline water. Russia, Pluteus liliputianus on fallen branch of deciduous tree, Pluteus spurius on decaying deciduous wood or soil. South Africa, Alloconiothyrium encephalarti, Phyllosticta encephalarticola and Neothyrostroma encephalarti (incl. Neothyrostroma gen. nov.)on leaves of Encephalartos sp., Chalara eucalypticola on leaf spots of Eucalyptus grandis × urophylla, Clypeosphaeria oleae on leaves of Olea capensis, Cylindrocladiella postalofficium on leaf litter of Sideroxylon inerme, Cylindromonium eugeniicola (incl. Cylindromonium gen. nov.)on leaf litter of Eugenia capensis, Cyphellophora goniomatis on leaves of Gonioma kamassi, Nothodactylaria nephrolepidis (incl. Nothodactylaria gen. nov. and Nothodactylariaceae fam. nov.)on leaves of Nephrolepis exaltata , Falcocladium eucalypti and Gyrothrix eucalypti on leaves of Eucalyptus sp., Gyrothrix oleae on leaves of Olea capensis subsp. macrocarpa, Harzia metrosideri on leaf litter of Metrosideros sp., Hippopotamyces phragmitis (incl. Hippopota-myces gen. nov.)on leaves of Phragmites australis, Lectera philenopterae on Philenoptera violacea , Leptosillia mayteni on leaves of Maytenus heterophylla , Lithohypha aloicola and Neoplatysporoides aloes on leaves of Aloe sp., Millesimomyces rhoicissi (incl. Millesimomyces gen. nov.) on leaves of Rhoicissus digitata, Neodevriesia strelitziicola on leaf litter of Strelitzia nicolai, Neokirramyces syzygii (incl. Neokirramyces gen. nov.)on leaf spots of Syzygium sp., Nothoramichloridium perseae (incl. Nothoramichloridium gen.nov.and Anungitiomycetaceae fam. nov.)on leaves of Persea americana, Paramycosphaerella watsoniae on leaf spots of Watsonia sp., Penicillium cuddlyae from dog food, Podocarpomyces knysnanus (incl. Podocarpomyces, gen.nov.)on leaves of Podocarpus falcatus, Pseudocercospora heteropyxidicola on leaf spots of Heteropyxis natalensis, Pseudopenidiella podocarpi, Scolecobasidium podocarpi and Ceramothyrium podocarpicola on leaves of Podocarpus latifolius, Scolecobasidium blechni on leaves of Blechnum capense, Stomiopeltis syzygii on leaves of Syzygium chordatum, Strelitziomyces knysnanus (incl. Strelitziomyces gen.nov.)on leaves of Strelitzia alba, Talaromyces clemensii from rotting wood in goldmine, Verrucocladosporium visseri on Carpobrotus edulis. Spain, Boletopsis mediterraneensis on soil, Calycina cortegadensisi on a living twig of Castanea sativa, Emmonsiellopsis tuberculata in fluvial sediments, Mollisia cor-tegadensis on dead attached twig of Quercus robur, Psathyrella ovispora on soil, Pseudobeltrania lauri on leaf litter of Laurus azorica, Terfezia dunensis in soil, Tuber lucentum in soil, Venturia submersa on submerged plant debris. Thailand,/b>, Cordyceps jakajanicola on cicada nymph, Cordyceps kuiburiensis on spider, Distoseptispora caricis on leaves of Carex sp., Ophiocordyceps khonkaenensis on cicada nymph. USA, Cytosporella juncicola and Davidiello- myces juncicola on culms of Juncus effusus, Monochaetia massachusettsianum from air sample, Neohelicomyces melaleucae and Periconia neobrittanica on leaves of Melaleuca styphelioides ?? lanceolata, Pseudocamarosporium eucalypti on leaves of Eucalyptus sp., Pseudogymnoascus lindneri from sediment in a mine, Pseudogymnoascus turneri from sediment in a railroad tunnel, Pulchroboletus sclerotiorum on soil, Zygosporium pseudomasonii on leaf of Serenoa repens. Vietnam, Boletus candidissimus and Veloporphyrellus vulpinus on soil.Morphological and culture characteristics are supported by DNA barcodes.

The authors describe ten new taxa for science using mostly both morphological and molecular data. In Ascomycota, descriptions are provided for Bambusistroma didymosporum gen. et spec. nov. (Pleosporales), Neodeightonia licuriensis sp. nov. (Botryosphaeriales) and Camposporium himalayanum sp. nov. (Fungi imperfecti). In Zygomycota, Gongronella guangdongensis sp. nov. (Mucorales) is described. Finally, in Basidiomycota descriptions are provided for Boidinia parva sp. nov. and Russula katarinae sp. nov. (Russsulales), Gloiocephala parvinelumbonifolia sp. nov. (Agaricales), Hypochnicium austrosinensis sp. nov. (Polyporales), Phallus ultraduplicatus sp. nov. (Phallales) and Suillus lariciphilus sp. nov. (Boletales).

A short history to the study of Russula in the Western United States is provided and for the first time an exhaustive list of all 49 taxa described from this part of the country has been compiled. As a start to a revision of these species, a first series of four holotypes (one from California and three from the Pacific Northwest) have here been studied microscopically, resulting in some very substantial changes concerning species concept and consequent systematic placement. Russula flava var. pacifica appears unrelated to the type variety. It is therefore excluded as member of Integroidinae, subgen. Polychromidia, and deserves probably to be upgraded to species level within subgen. Russula. The Californian R. paxilloides is lectotypified and is a good member of subgen. Russula, but is closer to sect. Persicinae than to the white-spored Vinaceae as previously suggested. Russula maxima, widely accepted as a species of subsect. Subcompactinae (subgen. Heterophyllidia), certainly does not belong ther...

The authors present detailed descriptions of microscopic features for some of the more common Russula species described by C.H. Peck from the eastern United States. As a result of these analyses, R. uncialis is confirmed as good member of subsect. Lilaceinae of subgenus Incrustatula. R. ventricosipes, R. pectinatoides and R. foetentula are confirmed as members of subgenus Ingratula, with R. ventricosipes being closer related to the R. foetens-group in the strict sense (= Foetentinae sensu M. Bon); with R. pectinatoides being related to the R. amoenolens group (= Pectinatinae M. Bon) and having a different spore ornamentation from what is usually identified under that name in Europe, whereas R. foetentula is reinstated as a good, American species that is related to the R. laurocerasi-group because of its almond smell. The type of R. modesta is clearly different from what is commonly identified as such and is provisionally maintained in a monotypic subsection Modestinae within subgenus Heterophylli...

Detailed microscopical observations on four type specimens of Russula subsect. Lactarioideae from North America are presented and illustrated. As the result of our analyses, all four species are accepted as good species in Lactarioideae, although sometimes with slightly modified concept. R. brevipes is recognized by the rather short and often inflated cells in the pileipellis, large spores with spiny, subreticulate ornamentation and the distinctly amyloid suprahilar spot. Whether or not the European R. chloroides is a later synonym remains to be examined. R. inopina is characterized by filiform, flexuous-undulate terminal cells in the pileipellis, as well as on the gill edge, and it lacks shorter, mucronate pileocystidia. R. romagnesiana, originally described to replace the invalidly published, European R. chloroides var. parvispora, is here considered to be quite different from this European taxon and is accepted as distinct, native American species characterized by having equally small spores, frequently bicapitate pileocystidia near the pileus center as well as hyphal terminations with a glutinous sheath, but lacking distinct incrustations. R. vesicatoria is defined as a species of sandy Pinus stands with crowded gills, large and clavate, obtuse to capitate, often thick-walled pileocystidia, very long and slender hyphal extremities and spores with an inamyloid suprahilar spot. A tentative key to all North American Lactarioideae introduces objective microscopic features for the identification of all recognized species in this group.

The types or authentic material of four members of Russula subsect. Maculatinae recognized by Romagnesi were studied: R. decipiens, R. decipiens var. vermiculata nom. inval., R. deceptiva and R. romagnesii. All studied specimens showed several similar micromorphological characters, particularly important one-celled pileocystidia, suggesting their close relationship. Based on the differences in spore ornamentation and terminal cells of hyphae in pileipellis near the cap margin, two morphotypes were recognized. The first one, represented by the neotypus of R. decipiens and authentic material of R. decipiens var. vermiculata nom. inval., has lower spore ornamentation with more numerous warts and apically constricted, terminal cells of hyphae in pileipellis as compared to the second morphotype represented by the holotypus of R. deceptiva and paratypus of R. romagnesii.

A taxonomic and nomenclatural revision of some representatives of Clavariaceae is presented based on extensive collecting in central and western Europe. Five species originally described from Europe are identified, redescribed and delimited: Clavaria fragilis, Ramariopsis crocea, R. corniculata, R. helvola and R. pulchella. Lectotypes, epitypes or neotypes are designated for all these species. Descriptions are based on macro- and micromorphological characters and supplemented with DNA analyses of the nrLSU regions from 20 specimens. The molecular phylogenetic analyses reconstructed a phylogram showing relation- ships among the discussed species as well as some closely related taxa. The taxonomic value of the ratio of length and width of spores (Q-value) is discussed.

R. hixsonii Murrill, only known from its type locality in Florida, USA, is described and illustrated from a recent collection in southern Georgia and compared with the type specimen. Its very unusual combination of morphological features and eventual affinities are discussed.

In this new contribution on russulas from the southeastern United Stated, the authors focus on four species that exhibit a blackening context: R. burkei Burl., R. subdensifolia Murrill, R. cinerascens Beardslee and R. magna Beardslee. In the past, every single one of these species has been related to Russula subgenus Polychromidia Romagn. subsection Decolorantinae R. Maire. Based upon the study of their typespecimens, all of the species here redescribed and illustrated are good members of Decolorantinae with a possible exception of R. subdensifolia which might be related to a group of pale-spored, blackening species that might be more tropical. Possible synonyms and related species are discussed. R. burkei, R. cinerascens and R. magna are here lectotypified.

Microscopical characters of type specimens for five species in Russula subgenus Heterophyllidia: R. albiduliformis Murrill, R. flocculosa Burl., R. maculosa Murrill, R. heterosporoides Murrill and R. subgraminicolor Murrill are described in detail. Taxonomy, systematic placement and nomenclatural aspects are discussed. Both R. heterosporoides Murrill and R. subgraminicolor Murrill are likely good species of subsection Virescentinae, whereas the other three species are more difficult to place with precision, but show affinities with both Virescentinae and Heterophyllinae.

Multivariate morphometric analyses of micromorphological characters measured on 35 specimens of Flammulina fennae and related species show that only a combination of spore dimensions and ixohyphidia characters are suitable for delimitation of this species. In order to confirm species identifications based on micromorphology, ribosomal ITS DNA sequences were obtained and compared with those previously deposited in GenBank, and phylogenetic analyses were performed using an ITS dataset of all known Flammulina species. All six specimens morphologically determined as F. fennae were identified by molecular data. Two of twelve specimens morphologically assigned to F. velutipes had F. elastica sequences. One ITS sequence of F. velutipes appears to be a hybrid: the ITS1 region is homologous to F. velutipes and ITS2 is homologous to another Flammulina species, F. rossica. Variability of morphocharacters observed for F. fennae and related species is discussed and compared with the data from previous studies. A key is provided to European taxa of the genus Flammulina together with a full description of F. fennae.