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Tuula Niskanen - One of the best experts on this subject based on the ideXlab platform.
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loose ends in the Cortinarius phylogeny five new myxotelamonoid species indicate a high diversity of these ectomycorrhizal fungi with south american nothofagaceae
Life, 2021Co-Authors: Maria Eugenia Salgado Salomon, Kare Liimatainen, Tuula Niskanen, Carolina Barroetavena, Matthew E Smith, Ursula PeintnerAbstract:This paper is a contribution to the current knowledge of taxonomy, ecology and distribution of South American Cortinarius (Pers.) Gray. Cortinarius is among the most widely distributed and species-rich basidiomycete genera occurring with South American Nothofagaceae and species are found in many distinct habitats, including shrublands and forests. Due to their ectomycorrhizal role, Cortinarius species are critical for nutrient cycling in forests, especially at higher latitudes. Some species have also been reported as edible fungi with high nutritional quality. Our aim is to unravel the taxonomy of selected Cortinarius belonging to phlegmacioid and myxotelamonioid species based on morphological and molecular data. After widely sampling Cortinarius specimens in Patagonian Nothofagaceae forests and comparing them to reference collections (including holotypes), we propose five new species of Cortinarius in this work. Phylogenetic analyses of concatenated rDNA ITS-LSU and RPB1 sequences failed to place these new species into known Cortinarius sections or lineages. These findings highlight our knowledge gaps regarding the fungal diversity of South American Nothofagaceae forests. Due to the high diversity of endemic Patagonian taxa, it is clear that the South American Cortinarius diversity needs to be discovered and described in order to understand the evolutionary history of Cortinarius on a global scale.
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Cortinarius section thaumasti in south american nothofagaceae forests
Mycologia, 2020Co-Authors: Kare Liimatainen, Brandon P Matheny, Ursula Peintner, Tuula Niskanen, Eduardo Nouhra, Alija B Mujic, Philipp Dresch, Beatriz Sanfabian, Giuliana Furci, Matthew E SmithAbstract:We studied the South American species of Cortinarius section Thaumasti based on morphological and molecular data. Members of this group can easily be identified in the field because the basidiomata...
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Cortinarius sect. Riederi: taxonomy and phylogeny of the new section with European and North American distribution
Mycological Progress, 2018Co-Authors: Tor Erik Brandrud, Kare Liimatainen, Tuula Niskanen, Karl Soop, Ilkka Kytovuori, Dimitar Bojantchev, Tobias Guldberg Froslev, Thomas Stjernegaard Jeppesen, Geert Schmidt-stohn, Francesco BellùAbstract:Cortinarius is one of the most species-rich genera of mushroom-forming fungi. Based on phylogenetic and morphological evidence, Cortinarius , sect. Riederi , is introduced at sectional level (= subsect. Riederi sensu Brandrud & Melot). The taxonomy, phylogeny, ecology and distribution of not only mainly European but also including some North American taxa of this section are treated, which includes nine species and two varieties. Of these, three taxa are described as new ( C. burlinghamiae , C. pallidoriederi and C. argenteolilacinus var. dovrensis ). The sect. Riederi species possess morphological features similar to Phlegmacium group(s) and forms a phylogenetically isolated lineage, with no supported affinity to other phlegmacioid groups. Three taxa are known from both Europe and North America, two species are known only from North America and five only from Europe. Altogether, eight of the ten taxa are associated with conifers or northern (boreal-subalpine) deciduous trees ( Betula spp.). Only two species occur in more temperate forests ( Fagus forests), and no species have so far been found in thermophilous Quercus forests
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new species of Cortinarius sect austroamericani sect nov from south american nothofagaceae forests
Mycologia, 2018Co-Authors: Beatriz Sanfabian, Ursula Peintner, Kare Liimatainen, Tuula Niskanen, Eduardo Nouhra, Camille Truong, Alija B Mujic, Philipp Dresch, Pepijn W Kooij, Brandon P MathenyAbstract:In this study, we document and describe the new Cortinarius section Austroamericani. Our results reveal high species diversity within this clade, with a total of 12 recognized species. Of these, only C. rufus was previously documented. Seven species are described as new based on basidiomata collections. The four remaining species are only known from environmental sequences. All examined species form ectomycorrhizal associations with species of Nothofagaceae and are currently only known from Argentinean and Chilean Patagonia. The phylogenetic analysis based on the nuc rDNA internal transcriber spacer (ITS1-5.8S-ITS2 = ITS) and partial 28S gene (28S) sequences shows that this section is related to other taxa from the Southern Hemisphere. Species in this group do not belong to subg. Telamonia, where C. rufus was initially placed. Cortinarius rufus and the newly described C. subrufus form a basal clade within sect. Austroamericani that has a weakly supported relationship with the core clade. Because the two species are morphologically similar to species from the core clade and share their distribution and Nothofagaceae associations, we include them here as part of sect. Austroamericani sensu lato (s.l.) until more material is available to refine the delimitation.
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spring and early summer species of Cortinarius subgenus telamonia section colymbadini and flavobasilis in the mountains of western north america
Mycologia, 2017Co-Authors: Joseph F Ammirati, Ursula Peintner, Kare Liimatainen, Tuula Niskanen, Dimitar Bojantchev, Regina Kuhnertfinkernagel, Cathy L CrippsAbstract:Seven species of Cortinarius, subgenus Telamonia, section Colymbadini and /Flavobasilis, are reported from conifer forests in the mountains of western North America. They typically produce basidiomes in the spring and summer. Only one species, C. colymbadinus, is widespread, occurring in Europe and western North America, but to date not reported from California. Cortinarius bridgei, C. flavobasilis, C. rumoribrunsi, C. vernalishastensis, and C. vernalisierraensis are new species. The first two are found throughout the western mountains, whereas the latter three thus far are known only from California. Cortinarius ahsii, a common species in the Rocky Mountains and Pacific Northwest, also has not been recorded from California.
Kare Liimatainen - One of the best experts on this subject based on the ideXlab platform.
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loose ends in the Cortinarius phylogeny five new myxotelamonoid species indicate a high diversity of these ectomycorrhizal fungi with south american nothofagaceae
Life, 2021Co-Authors: Maria Eugenia Salgado Salomon, Kare Liimatainen, Tuula Niskanen, Carolina Barroetavena, Matthew E Smith, Ursula PeintnerAbstract:This paper is a contribution to the current knowledge of taxonomy, ecology and distribution of South American Cortinarius (Pers.) Gray. Cortinarius is among the most widely distributed and species-rich basidiomycete genera occurring with South American Nothofagaceae and species are found in many distinct habitats, including shrublands and forests. Due to their ectomycorrhizal role, Cortinarius species are critical for nutrient cycling in forests, especially at higher latitudes. Some species have also been reported as edible fungi with high nutritional quality. Our aim is to unravel the taxonomy of selected Cortinarius belonging to phlegmacioid and myxotelamonioid species based on morphological and molecular data. After widely sampling Cortinarius specimens in Patagonian Nothofagaceae forests and comparing them to reference collections (including holotypes), we propose five new species of Cortinarius in this work. Phylogenetic analyses of concatenated rDNA ITS-LSU and RPB1 sequences failed to place these new species into known Cortinarius sections or lineages. These findings highlight our knowledge gaps regarding the fungal diversity of South American Nothofagaceae forests. Due to the high diversity of endemic Patagonian taxa, it is clear that the South American Cortinarius diversity needs to be discovered and described in order to understand the evolutionary history of Cortinarius on a global scale.
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Cortinarius section thaumasti in south american nothofagaceae forests
Mycologia, 2020Co-Authors: Kare Liimatainen, Brandon P Matheny, Ursula Peintner, Tuula Niskanen, Eduardo Nouhra, Alija B Mujic, Philipp Dresch, Beatriz Sanfabian, Giuliana Furci, Matthew E SmithAbstract:We studied the South American species of Cortinarius section Thaumasti based on morphological and molecular data. Members of this group can easily be identified in the field because the basidiomata...
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Cortinarius sect. Riederi: taxonomy and phylogeny of the new section with European and North American distribution
Mycological Progress, 2018Co-Authors: Tor Erik Brandrud, Kare Liimatainen, Tuula Niskanen, Karl Soop, Ilkka Kytovuori, Dimitar Bojantchev, Tobias Guldberg Froslev, Thomas Stjernegaard Jeppesen, Geert Schmidt-stohn, Francesco BellùAbstract:Cortinarius is one of the most species-rich genera of mushroom-forming fungi. Based on phylogenetic and morphological evidence, Cortinarius , sect. Riederi , is introduced at sectional level (= subsect. Riederi sensu Brandrud & Melot). The taxonomy, phylogeny, ecology and distribution of not only mainly European but also including some North American taxa of this section are treated, which includes nine species and two varieties. Of these, three taxa are described as new ( C. burlinghamiae , C. pallidoriederi and C. argenteolilacinus var. dovrensis ). The sect. Riederi species possess morphological features similar to Phlegmacium group(s) and forms a phylogenetically isolated lineage, with no supported affinity to other phlegmacioid groups. Three taxa are known from both Europe and North America, two species are known only from North America and five only from Europe. Altogether, eight of the ten taxa are associated with conifers or northern (boreal-subalpine) deciduous trees ( Betula spp.). Only two species occur in more temperate forests ( Fagus forests), and no species have so far been found in thermophilous Quercus forests
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new species of Cortinarius sect austroamericani sect nov from south american nothofagaceae forests
Mycologia, 2018Co-Authors: Beatriz Sanfabian, Ursula Peintner, Kare Liimatainen, Tuula Niskanen, Eduardo Nouhra, Camille Truong, Alija B Mujic, Philipp Dresch, Pepijn W Kooij, Brandon P MathenyAbstract:In this study, we document and describe the new Cortinarius section Austroamericani. Our results reveal high species diversity within this clade, with a total of 12 recognized species. Of these, only C. rufus was previously documented. Seven species are described as new based on basidiomata collections. The four remaining species are only known from environmental sequences. All examined species form ectomycorrhizal associations with species of Nothofagaceae and are currently only known from Argentinean and Chilean Patagonia. The phylogenetic analysis based on the nuc rDNA internal transcriber spacer (ITS1-5.8S-ITS2 = ITS) and partial 28S gene (28S) sequences shows that this section is related to other taxa from the Southern Hemisphere. Species in this group do not belong to subg. Telamonia, where C. rufus was initially placed. Cortinarius rufus and the newly described C. subrufus form a basal clade within sect. Austroamericani that has a weakly supported relationship with the core clade. Because the two species are morphologically similar to species from the core clade and share their distribution and Nothofagaceae associations, we include them here as part of sect. Austroamericani sensu lato (s.l.) until more material is available to refine the delimitation.
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spring and early summer species of Cortinarius subgenus telamonia section colymbadini and flavobasilis in the mountains of western north america
Mycologia, 2017Co-Authors: Joseph F Ammirati, Ursula Peintner, Kare Liimatainen, Tuula Niskanen, Dimitar Bojantchev, Regina Kuhnertfinkernagel, Cathy L CrippsAbstract:Seven species of Cortinarius, subgenus Telamonia, section Colymbadini and /Flavobasilis, are reported from conifer forests in the mountains of western North America. They typically produce basidiomes in the spring and summer. Only one species, C. colymbadinus, is widespread, occurring in Europe and western North America, but to date not reported from California. Cortinarius bridgei, C. flavobasilis, C. rumoribrunsi, C. vernalishastensis, and C. vernalisierraensis are new species. The first two are found throughout the western mountains, whereas the latter three thus far are known only from California. Cortinarius ahsii, a common species in the Rocky Mountains and Pacific Northwest, also has not been recorded from California.
Ursula Peintner - One of the best experts on this subject based on the ideXlab platform.
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loose ends in the Cortinarius phylogeny five new myxotelamonoid species indicate a high diversity of these ectomycorrhizal fungi with south american nothofagaceae
Life, 2021Co-Authors: Maria Eugenia Salgado Salomon, Kare Liimatainen, Tuula Niskanen, Carolina Barroetavena, Matthew E Smith, Ursula PeintnerAbstract:This paper is a contribution to the current knowledge of taxonomy, ecology and distribution of South American Cortinarius (Pers.) Gray. Cortinarius is among the most widely distributed and species-rich basidiomycete genera occurring with South American Nothofagaceae and species are found in many distinct habitats, including shrublands and forests. Due to their ectomycorrhizal role, Cortinarius species are critical for nutrient cycling in forests, especially at higher latitudes. Some species have also been reported as edible fungi with high nutritional quality. Our aim is to unravel the taxonomy of selected Cortinarius belonging to phlegmacioid and myxotelamonioid species based on morphological and molecular data. After widely sampling Cortinarius specimens in Patagonian Nothofagaceae forests and comparing them to reference collections (including holotypes), we propose five new species of Cortinarius in this work. Phylogenetic analyses of concatenated rDNA ITS-LSU and RPB1 sequences failed to place these new species into known Cortinarius sections or lineages. These findings highlight our knowledge gaps regarding the fungal diversity of South American Nothofagaceae forests. Due to the high diversity of endemic Patagonian taxa, it is clear that the South American Cortinarius diversity needs to be discovered and described in order to understand the evolutionary history of Cortinarius on a global scale.
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Cortinarius section thaumasti in south american nothofagaceae forests
Mycologia, 2020Co-Authors: Kare Liimatainen, Brandon P Matheny, Ursula Peintner, Tuula Niskanen, Eduardo Nouhra, Alija B Mujic, Philipp Dresch, Beatriz Sanfabian, Giuliana Furci, Matthew E SmithAbstract:We studied the South American species of Cortinarius section Thaumasti based on morphological and molecular data. Members of this group can easily be identified in the field because the basidiomata...
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new species of Cortinarius sect austroamericani sect nov from south american nothofagaceae forests
Mycologia, 2018Co-Authors: Beatriz Sanfabian, Ursula Peintner, Kare Liimatainen, Tuula Niskanen, Eduardo Nouhra, Camille Truong, Alija B Mujic, Philipp Dresch, Pepijn W Kooij, Brandon P MathenyAbstract:In this study, we document and describe the new Cortinarius section Austroamericani. Our results reveal high species diversity within this clade, with a total of 12 recognized species. Of these, only C. rufus was previously documented. Seven species are described as new based on basidiomata collections. The four remaining species are only known from environmental sequences. All examined species form ectomycorrhizal associations with species of Nothofagaceae and are currently only known from Argentinean and Chilean Patagonia. The phylogenetic analysis based on the nuc rDNA internal transcriber spacer (ITS1-5.8S-ITS2 = ITS) and partial 28S gene (28S) sequences shows that this section is related to other taxa from the Southern Hemisphere. Species in this group do not belong to subg. Telamonia, where C. rufus was initially placed. Cortinarius rufus and the newly described C. subrufus form a basal clade within sect. Austroamericani that has a weakly supported relationship with the core clade. Because the two species are morphologically similar to species from the core clade and share their distribution and Nothofagaceae associations, we include them here as part of sect. Austroamericani sensu lato (s.l.) until more material is available to refine the delimitation.
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the enigmatic Cortinarius magellanicus complex occurring in nothofagaceae forests of the southern hemisphere
Fungal Biology, 2018Co-Authors: Maria Eugenia Salgado Salomon, Carolina Barroetavena, Egon Horak, Philipp Dresch, Felipe Galleguillos, Ursula PeintnerAbstract:Cortinarius magellanicus Speg. is an edible, ectomycorrhizal fungus, widely distributed in Argentina, Chile and New Zealand. However, earlier studies already indicated that the epithet 'magellanicus' might have been applied in a wide sense, thus circumscribing several species. A neotype was designated by Moser and Horak (1975) due Spegazzini's type was lost. Argentinian Nothofagaceae forests' samples, from autumn of 2017, morphologically recognized as C. magellanicus were used for a phylogenetic analysis, including sequences from type material and closely related species. Our results showed that C. magellanicus represents a complex of species, with at least three phylogenetic lineages, each with strong regionalism and distinct host associations. Cortinarius magellanicus s. str. is restricted to Patagonia of Argentina and Chile. The misidentified reports from New Zealand and Australia represent distinct and different lineages. In the present contribution, the re-description of C. magellanicus is based on neotype material and two new species are proposed. Cortinarius vitreopileatus var. similissimus is described as variety from New Zealand resembling C. magellanicus, however without close phylogenetic relationship to it. The taxonomic delimitation for C. magellanicus species complex is of high relevance due to the abundance of these fungi and their ectomycorrhizal role in Nothofagaceae forests in Gondwanian region.
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spring and early summer species of Cortinarius subgenus telamonia section colymbadini and flavobasilis in the mountains of western north america
Mycologia, 2017Co-Authors: Joseph F Ammirati, Ursula Peintner, Kare Liimatainen, Tuula Niskanen, Dimitar Bojantchev, Regina Kuhnertfinkernagel, Cathy L CrippsAbstract:Seven species of Cortinarius, subgenus Telamonia, section Colymbadini and /Flavobasilis, are reported from conifer forests in the mountains of western North America. They typically produce basidiomes in the spring and summer. Only one species, C. colymbadinus, is widespread, occurring in Europe and western North America, but to date not reported from California. Cortinarius bridgei, C. flavobasilis, C. rumoribrunsi, C. vernalishastensis, and C. vernalisierraensis are new species. The first two are found throughout the western mountains, whereas the latter three thus far are known only from California. Cortinarius ahsii, a common species in the Rocky Mountains and Pacific Northwest, also has not been recorded from California.
Balint Dima - One of the best experts on this subject based on the ideXlab platform.
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Cortinarius subsalor and c tibeticisalor spp nov two new species from the section delibuti from china
PeerJ, 2021Co-Authors: Balint Dima, Mengle Xie, Junliang Chen, Chayanard Phukhamsakda, Ke Wang, Tiezheng WeiAbstract:Cortinarius subsalor and C. tibeticisalor, belonging to the section Delibuti, are described from China as new to science. Cortinarius subsalor has been found to be associated with Lithocarpus trees in subtropical China and resembling C. salor, but it differs from the later by having slender basidiomata and the narrower basidiospores. Cortinarius tibeticisalor was collected from eastern Tibetan Plateau, associated with Abies. It differs from other species within sect. Delibuti by having olive tinge of mature or dried basidiomata and bigger basidiospores. The molecular data also support C. subsalor and C. tibeticisalor as new species. The phylogenetic analyses and biogeography of sect. Delibuti are discussed and a key to the species of this section currently known in the world is provided.
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an emended subgenus myxacium in the light of a global Cortinarius agaricales phylogeny
Mycological Progress, 2021Co-Authors: Karl Soop, David A. Orlovich, Andy R Nilsen, Balint DimaAbstract:Cortinarius subgenus Myxacium has been used since the times of Elias Fries to denote a large group of species characterized by a viscid universal veil. In molecular studies during the past decades, the subgenus was shown to be polyphyletic. In this study, we emend the circumscription of the subgenus, taking into consideration recent research involving taxa from both hemispheres. Known sections of myxacioid taxa are discussed, identifying those that remain in the subgenus and those that do not. A new Myxacium species Cortinarius vitreopallidus from New Zealand is described, and the genus Quadrispora is recombined as a section in Cortinarius subg. Myxacium.
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a phylogenetic approach to a global supraspecific taxonomy of Cortinarius agaricales with an emphasis on the southern mycota
Persoonia, 2019Co-Authors: Karl Soop, Balint Dima, Jerry A Cooper, D Park, Bernhard OertelAbstract:A section-based taxonomy of Cortinarius, covering large parts of the temperate North and South Hemispheres, is presented. Thirty-seven previously described sections are reviewed, while another forty-two sections are proposed as new or as new combinations. Twenty additional clades are recovered but not formally described. Furthermore, six new or combined species names are introduced, and one species is neotypified. The structure is supported by morphological characters and molecular evidence, based on two (nrITS and nrLSU) and four (nrITS, nrLSU, rpb1 and rpb2) loci datasets and analysed by Maximum Likelihood methods (PhyML, RAxML). Altogether 789 Cortinarius samples were included in the study.
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new Cortinarius agaricales species described from new zealand
New Zealand Journal of Botany, 2018Co-Authors: Karl Soop, Michael Wallace, Balint DimaAbstract:As part of an ongoing effort to investigate the diversity of the genus Cortinarius in New Zealand, 12 new species are described: Cortinarius caryotoides, Cortinarius citribasalis, Cortinarius durif...
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Cortinarius longistipitatus a new species in subgenus telamonia section cinnabarini from pakistan
Phytotaxa, 2017Co-Authors: Malka Saba, Abdul Nasir Khalid, Sana Jabeen, Balint DimaAbstract:A new species of Cortinarius, C. longistipitatus, in subgenus Telamonia sect. Cinnabarini, is described and illustrated based on collections from northern Pakistan. The dark brown to blackish brown coloration of the pileus, the extraordinary long, equal to bulbous stipe, the red universal veil remnants on the stipe base and its occurrence in conifer forests make it a remarkably distinct species in the field. The internal transcribed spacer region (ITS) and large subunit (LSU) of the nuclear ribosomal RNA gene was amplified. The evolutionary relationship of the species was inferred by means of Maximum Likelihood phylogenetic analysis which revealed that C. longistipitatus is distinct from other Cortinarius species.
Eduardo Nouhra - One of the best experts on this subject based on the ideXlab platform.
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thaxterogaster revisited a phylogenetic and taxonomic overview of sequestrate Cortinarius from patagonia
Mycologia, 2021Co-Authors: Eduardo Nouhra, Francisco Kuhar, Camille Truong, Nicolas Pastor, Esteban M Crespo, Alija B Mujic, Marcos V Caiafa, Matthew E SmithAbstract:In the Patagonian region, Cortinarius is the most diverse and abundant genus of ectomycorrhizal fungi with at least 250 species. Sequestrate forms were until recently documented within the genus Thaxterogaster, a genus now known to be polyphyletic, and many were consequently transferred to Cortinarius. Original descriptions were mostly available in German and Spanish and interpretations of morphological structures outdated. Despite recent advances in Cortinarius systematics, the current classification, diversity, and ecology of sequestrate "cortinarioid" fungi in Patagonia remain unclear. The objective of this study was to provide an update on sequestrate Cortinarius of southern South America. We documented each species with morphological descriptions, photographs, basidiospore scanning electron microscopy (SEM) images, and molecular characterization using nuc rDNA internal transcribed spacer region ITS1-5.8S-ITS2 (ITS) and nuc 28S rDNA (28S) sequence data. Original descriptions of taxa were also translated to English and revised based on fresh collections. We documented 24 species from Patagonia based on molecular data and conducted morphological and phylogenetic analysis for 18 previously described species based on type and reference specimens. In addition, we formally described two new species. Four additional taxa were provisionally determined as new but require further study. New ITS sequence data were produced from eight type specimens. We also provide a new name, Cortinarius gloiodes, nom. nov., for the taxon previously described as Thaxterogaster gliocyclus. In addition to the species treated in detail, we provided additional reference information and discussion on six described species that remained incompletely known or for which no recent collections were found. Of the 24 taxa documented from Patagonia, 15 species were assigned to 12 current sections in the genus Cortinarius. Analysis of spore ultrastructure showed that sequestrate forms of Patagonian Cortinarius lack a true perisporium.
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Cortinarius section thaumasti in south american nothofagaceae forests
Mycologia, 2020Co-Authors: Kare Liimatainen, Brandon P Matheny, Ursula Peintner, Tuula Niskanen, Eduardo Nouhra, Alija B Mujic, Philipp Dresch, Beatriz Sanfabian, Giuliana Furci, Matthew E SmithAbstract:We studied the South American species of Cortinarius section Thaumasti based on morphological and molecular data. Members of this group can easily be identified in the field because the basidiomata...
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unveiling new sequestrate Cortinarius species from northern patagonian nothofagaceae forests based on molecular and morphological data
Mycologia, 2019Co-Authors: Nicolas Pastor, Francisco Kuhar, Esteban M Crespo, Alija B Mujic, Jorge Oscar Chiapella, Eduardo NouhraAbstract:Because of systematic sampling campaigns in the northern Patagonian Nothofagaceae forests of Argentina, several specimens of sequestrate fungi were collected. Some of those collections showed phylogenetic affinities and morphological similarities to members of the formerly recognized sequestrate genus Thaxterogaster, currently a synonym of Cortinarius on the basis of molecular data. Comparisons of macro- and micromorphological features and sequences of nuc rDNA internal transcribed spacer (ITS) regions have revealed that these collections belong to formerly undescribed species. The sequences of the four new taxa presented here, Cortinarius flavopurpureus, C. translucidus, C. nahuelhuapensis, and C. infrequens, were combined into a data set including additional sequences generated from herbarium collections and retrieved from public gene databases and analyzed by maximum likelihood and Bayesian inference methods. The four new species were resolved as distinct clades with strong support; at the same time, they showed unique morphological characteristics (hypogeous to subhypogeous habit, complete gasteromycetation, and spore shape and ornamentation) that separate them from previously described Cortinarius species. In addition, several undescribed and/or not previously sequenced species from these forests were detected through phylogenetic analysis of ectomycorrhizal root tip sequences. A key of characters to identify the sequestrate Cortinarius from Patagonia is provided.
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new species of Cortinarius sect austroamericani sect nov from south american nothofagaceae forests
Mycologia, 2018Co-Authors: Beatriz Sanfabian, Ursula Peintner, Kare Liimatainen, Tuula Niskanen, Eduardo Nouhra, Camille Truong, Alija B Mujic, Philipp Dresch, Pepijn W Kooij, Brandon P MathenyAbstract:In this study, we document and describe the new Cortinarius section Austroamericani. Our results reveal high species diversity within this clade, with a total of 12 recognized species. Of these, only C. rufus was previously documented. Seven species are described as new based on basidiomata collections. The four remaining species are only known from environmental sequences. All examined species form ectomycorrhizal associations with species of Nothofagaceae and are currently only known from Argentinean and Chilean Patagonia. The phylogenetic analysis based on the nuc rDNA internal transcriber spacer (ITS1-5.8S-ITS2 = ITS) and partial 28S gene (28S) sequences shows that this section is related to other taxa from the Southern Hemisphere. Species in this group do not belong to subg. Telamonia, where C. rufus was initially placed. Cortinarius rufus and the newly described C. subrufus form a basal clade within sect. Austroamericani that has a weakly supported relationship with the core clade. Because the two species are morphologically similar to species from the core clade and share their distribution and Nothofagaceae associations, we include them here as part of sect. Austroamericani sensu lato (s.l.) until more material is available to refine the delimitation.
