P.B. Matheny's research while affiliated with The University of Tennessee Medical Center at Knoxville and other places

Publications (324)

Article
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We describe four new nodulose-spored species of Inocybe from tropical regions of Africa: I. beninensis, I. flavipes, I. fuscobrunnea and I. pallidiangulata. The new species are recognised based on morphological data and phylogenetic analyses of ITS, 28S and RPB2 sequences. Phylogenetic analyses indicated that I. flavipes and I. beninensis are part...
Article
The Roseinae clade is a lineage of the genus Russula primarily composed of species of Russula subsect. Roseinae. Species in this morphologically distinct clade possess a white to pale cream spore print, mild taste, positive reaction to sulfovanillin, and primordial hyphae with acid-resistant crystals in the pileipellis. Here, we present a morpholog...
Article
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‐ Mosses harbor fungi whose interactions within their hosts remain largely unexplored. Trophic ranges of fungal endophytes from the moss Dicranum scoparium were hypothesized to encompass saprotrophism. This moss is an ideal host to study fungal trophic lability because of its natural senescence gradient, and because it can be grown axenically. ‐ Di...
Article
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Wildfires play a critical role in maintaining biodiversity and shaping ecosystem structure in fire-prone regions, and successional patterns involving numerous plant and fungal species in post-fire events have been elucidated. Evidence is growing to support the idea that some post-fire fungi can form endophytic/endolichenic relationships with plants...
Article
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Sequestrate fungi have enclosed hypogeous, subhypogeous, or epigeous basidiomes and have lost the ability to actively discharge their spores. They can be distinguished as gasteroid (basidiome fully enclosed with a loculated hymenophore) or secotioid (basidiome with some agaricoid or pileate-stipitate features, but the lamellae are misshapen and une...
Preprint
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The ectomycorrhizal symbiosis is an essential guild of many forested ecosystems and has a dynamic evolutionary history across kingdom Fungi, having independently evolved from diverse types of saprotrophic ancestors. In this study, we seek to identify genomic features of the transition to the ectomycorrhizal habit within the Russulaceae, one of the...
Article
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The family Inocybaceae has been poorly studied in Africa. Here we describe the first species of the genus Mallocybe from West African and Zambian woodlands dominated by ectomycorrhizal trees of Fabaceae and Phyllanthaceae. The new species M. africana is characterized by orange-brown fruitbodies, a fibrillose pileus, a stipe tapered towards the base...
Article
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...
Article
Multigene data sets were assembled to evaluate the phylogeny of species attributed to the genus Pholiota sensu A.H. Sm. & Hesler. This effort included generation of just more than 200 new sequences from 19 type collections of Pholiota and recent samples from East Asia. Phylogenetic analyses reinforced the autonomous phylogenetic positions of pholio...
Article
Two new species of Deconica with chrysocystidia are described from Australia and Mexico. Deconica milvispora, from a warm temperate rainforest in Queensland, Australia, is characterized by rhomboid basidiospores with nodulose angles not observed in any member of the genus until now. Deconica esperancensis, from a cloud forest in the south of Mexico...
Preprint
Full-text available
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 inc...
Article
Agarics (gilled mushrooms) and the order Agaricales include some of the best‐known and most charismatic fungi. However, neither group has had its constituent genera exhaustively compiled in a modern phylogenetic context. To provide that framework, we identified and analyzed 1383 names of genera of agarics (regardless of taxonomic placement) and the...
Article
Following a late fall wildfire in 2016 in the Great Smoky Mountains National Park, pyrophilous fungi in burn zones were documented over a 2-y period with respect to burn severity and phenology. Nuc rDNA internal transcribed spacer (ITS1-5.8S-ITS2 = ITS) barcodes were obtained to confirm morphological evaluations. Forty-one taxa of Ascomycota and Ba...
Article
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Premise: Pyrophilous fungi form aboveground fruiting structures (ascocarps) following wildfires, but their ecology, natural history, and life cycles in the absence of wildfires are largely unknown. Sphaerosporella is considered to be pyrophilous. This study explores Sphaerosporella ascocarp appearance following a rare 2016 wildfire in the Great Sm...
Article
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 fun...
Article
Pyrophilous fungi produce sporocarps after a fire but little is known about their ecology prior to or after a fire event. Recently, the body snatchers hypothesis was proposed that suggests some post-fire fungi form endophytic and/or endolichenic relationships with plants and lichens. To test the body snatchers hypothesis, bryophyte, lichen, club mo...
Article
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 are small and Phlegmacium-like with a bulbous stipe and the universal veil in most species forms a distinct volva at the base of the stipe. The phylogen...
Article
A six-gene phylogeny of the Inocybaceae is presented to address classification of major clades within the family. Seven genera are recognized that establish a global overview of phylogenetic relationships in the Inocybaceae. Two genera—Nothocybe and Pseudosperma—are described as new. Two subgenera of Inocybe—subg. Inosperma and subg. Mallocybe—are...
Preprint
Full-text available
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 fun...
Article
Psathyloma is an agaricoid genus described recently to accommodate two species of brown-spored agarics from Australasia superficially similar to Psathyrella and Hebeloma. Phylogenetic analyses published along with the description of the genus determined that an unidentified species of Psathyloma was also present in Patagonia based on ITS sequences...
Article
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Deconica cokeriana is proposed as a new combination based on morphological and molecular data. This species is fully described, discussed, and illustrated. Until now, D. cokeriana is only known from the eastern USA, specifically from Connecticut, Georgia, Ohio, and Tennessee.
Article
This article is a Commentary on Sato & Toju, 222: 1924–1935.
Article
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Five species of Hydnum have been generally recognized from eastern North America based on morphological recognition: H.albidum , H.albomagnum , H.repandum and varieties, H.rufescens , and H.umbilicatum . Other unique North American species, such as H.caespitosum and H.washingtonianum , are either illegitimately named or considered synonymous with E...
Data
BI phylogeny of global species of Hydnum shown as a rectangular tree
Article
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 fro...
Article
A systematic reevaluation of North American pyrophilous or “burn-loving” species of Pholiota is presented based on molecular and morphological examination of type and historical collections. Confusion surrounds application of the names P. brunnescens, P. carbonaria, P. castanea, P. fulvozonata, P. highlandensis, P. molesta, and P. subsaponacea, wit...
Article
Premise of the Study The Hymenochaetales are dominated by lignicolous saprotrophic fungi involved in wood decay. However, the group also includes bryophilous and terricolous taxa, but their modes of nutrition are not clear. Here, we investigate patterns of carbon and nitrogen utilization in numerous non‐lignicolous Hymenochaetales and provide a phy...
Chapter
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This chapter is an overview of the 2189 fungal species published as new to science in 2017, focussing on new mycorrhizal, pathogenic, edible fungi relatives, lichen and lichen-dwelling fungal species. The top country for discovery was China, with 35% of the new species, reflecting the world-leading scientific investment in fungal discovery in that...
Conference Paper
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More than 400 million years ago, before plants had leaves and roots, they had established intimate relationships with fungi. Fungi at that time may already have been key ecosystem players that recycled carbon, solubilized and redistributed minerals, and colonized plants and other organisms. We will assess fossil and phylogenetic evidence for the ki...
Article
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Fungi expressing P450nor, an unconventional nitric oxide (NO) reducing cytochrome P450, are considered significant contributors to environmental nitrous oxide (N2O) emissions. Despite extensive efforts, fungal contributions to N2O emissions remain uncertain. For example, the majority of N2O emitted from antibiotic-amended soil microcosms is attribu...
Article
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Nomenclatural type definitions are one of the most important concepts in biological nomenclature. Being physical objects that can be re-studied by other researchers, types permanently link taxonomy (an artificial agreement to classify biological diversity) with nomenclature (an artificial agreement to name biological diversity). Two proposals to am...
Article
The Inocybe geophylla group is circumscribed based on phylogenetic analysis of DNA sequences largely sampled from North America and Europe. Twenty-nine phylogenetic species are uncovered after analysis of combined nuc 28S rDNA (28S) and RNA polymerase II second largest subunit (rpb2) DNA sequence data. Species in the I. geophylla group share the pr...
Article
Replacement names are proposed for two Australian Inocybe species that are illegitimate later homonyms: I. austrofibrillosipes for I. fibrillosipes Matheny & al. and I. fulvotomentosa for I. mallocyboides Matheny & al.
Preprint
Full-text available
Fungi expressing P450nor, an unconventional nitric oxide (NO) reducing cytochrome P450, are thought to be significant contributors to soil nitrous oxide (N 2 O) emissions. However, fungal contributions to N 2 O emissions remain uncertain due to inconsistencies in measurements of N 2 O formation by fungi. Much of the N 2 O emitted from antibiotic-am...
Data
Figure S1. (A) Mass chromatogram of LC‐MS/MS. Figure S2. (A–E) RAxML phylogenies of psilocybin (PS) genes with support shown out of 100 bootstraps. Figure S3. Gene tree–species tree reconciliation in NOTUNG. Figure S4. Schematics of the bioinformatic pipelines used to detect horizontal gene transfers (HGTs) to Panaeolus cyanescens, along with th...
Article
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Secondary metabolites are a heterogeneous class of chemicals that often mediate interactions between species. The tryptophan-derived secondary metabolite, psilocin, is a serotonin receptor agonist that induces altered states of consciousness. A phylogenetically disjunct group of mushroom-forming fungi in the Agaricales produce the psilocin prodrug,...
Article
The family Russulaceae is considered an iconic lineage of mostly mushroom-forming basidiomycetes due to their importance as edible mushrooms in many parts of the world, and their ubiquity as ectomycorrhizal symbionts in both temperate and tropical forested biomes. Although much research has been focused on this group, a comprehensive or cohesive sy...
Article
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Two new species in the genus Auritella (Inocybaceae) are described as new from tropical rainforest in Cameroon. Descriptions, photographs, line drawings, and a worldwide taxonomic key to the described species of Auritella are presented. Phylogenetic analysis of 28S rDNA and rpb2 nucleotide sequence data suggests at least five phylogenetic species t...
Article
Reports of true morels (Morchella) fruiting on conifer burn sites are common in western North America where five different fire-adapted species of black morels (Elata Clade) have been documented based on multilocus phylogenetic analyses. Fruiting of post-fire morels in eastern North America, by comparison, are rare and limited to a report from Minn...
Article
Full-text available
Secondary metabolites are heterogeneous natural products that often mediate interactions between species. The tryptophan-derived secondary metabolite, psilocin, is a serotonin receptor agonist that induces altered states of consciousness. A phylogenetically disjunct group of mushroom-forming fungi in the Agaricales produce the psilocin prodrug, psi...
Article
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 sp...
Article
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 sp...
Article
Pleurocollybia cibaria is a wild edible mushroom sold in markets in Peru. The genus Pleurocollybia shares a phylogenetic alliance with the Tricholomatineae in the family Biannulariaceae (= Catathelasmataceae), however, no taxonomic investigations of P. cibaria have been performed since it was originally described over 50 years ago. Here we employ a...
Article
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 spec...
Chapter
The science of biogeography maps spatial patterns of biological diversity as a means of understanding the evolutionary and ecological processes that structure life on this planet. The documentation of broad spatial patterns of biodiversity in plant and animal life is fundamental to current understanding of ecology and evolution. This chapter review...
Article
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 previ...
Article
Although fungi are one of the most diverse groups of organisms, little is known about the processes that shape their high taxonomic diversity. This study focuses on evolution of ectomycorrhizal (ECM) mushroom-forming fungi, symbiotic associates of many trees and shrubs, in the suborder Tricholomatineae of the Agaricales. We used the BiSSE model and...
Article
The genus Camarophyllopsis contains species with lamellate (agaricoid) basidiomes in the family Clavariaceae (Agaricales), a group otherwise dominated by club-like (clavarioid) or branched (coralloid) forms. Previous studies have suggested that species classified in Camarophyllopsis occur in two independent lineages. We reconstructed a multilocus p...
Article
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A new genus and three new species of Agaricales are described from the Pakaraima Mountains of Guyana in the central Guiana Shield. All three of these new species fruit on the ground in association with species of the ectomycorrhizal (ECM) tree genus Dicymbe (Fabaceae subfam. Caesalpinioideae) and one species has been shown to form ectomycorrhizas....
Article
Full-text available
Inocybe distincta sp. nov. is described from Kerala State, India. A comprehensive description, photographs, line drawings and comments are provided. The nuclear ribosomal internal transcribed spacer region (ITS), a portion of the nuclear ribosomal large subunit (nrLSU) and a portion of the nuclear second-largest subunit of RNA polymerase II (RPB2)...