Dennis E Desjardin

San Francisco State University | SFSU · Department of Biology

A new species of Ripartitella, R. degreefii, is proposed based on phylogenetic, morphological, and ecological evidence from specimens collected in medium elevation (1000 to 2100 masl) forests of the Albertine Rift, in the Democratic Republic of Congo and São Tomé (Africa). The species is described and compared to phylogenetically related or morphol...

Mushrooms and allies belong to the Agaricomycetes lineage of Basidiomycota. A total of 260 species, belonging in 109 genera, 51 families and 13 orders have been reported from São Tomé and Príncipe between 1851 and 2020, of which 66 were described as new species. They range in body forms from agarics and boletes to polyporoid, clavarioid, coralloid,...

Five species of hygrophoroid fungi belonging to the genera Cuphophyllus and Hygrocybe are reported from the African island nation, Republic of São Tomé and Príncipe. These taxa represent two new species (C. laranja, H. macambrarensis), one undetermined taxon, and two new distributional reports. Comprehensive descriptions, line drawings, color photo...

This treatise serves as a preliminary monograph and phylogenetic treatment of Marasmius from the African island nation of São Tomé and Príncipe (ST&P), based on data generated from 30 specimens collected in 2008. Twenty-one species are described, seven of which represent species new to science (Marasmius albisubiculosus, M. diversus, M. elaeocephal...

Two new species of Mycena belonging to Section Longisetae are described from cloud forests of Veracruz State, Mexico, viz., Mycena glaesisetosa and M. punkissima. Sequences of nuc rDNA ITS1-5.8S-ITS2 were generated for barcoding purposes and for comparisons with similar species. Comprehensive descriptions, line drawings of salient micromorphologica...

Mushroom-forming fungi (Agaricomycetes) have the greatest morphological diversity and complexity of any group of fungi. They have radiated into most niches and fulfil diverse roles in the ecosystem, including wood decomposers, pathogens or mycorrhizal mutualists. Despite the importance of mushroom-forming fungi, large-scale patterns of their evolut...

Seven species of bioluminescent fungi are recorded from the cloud forests in Mexico. Six represent new species belonging to the genus Mycena, whereas Mycena globulispora is a new distribution record for the country. Descriptions, illustrations, photographs, and an identification key to bioluminescent fungi species from Mexico are provided. Sequence...

Limited research has been published on the mushroom-forming basidiomycetous fungi of the oceanic islands São Tomé and Príncipe, West Africa. Based on field work in April 2006 and 2008, which generated 24 specimens of mycenoid fungi, we recognize 14 species of Mycena, and 5 species belonging to the allied genera Clitocybula, Filoboletus, Hydropus an...

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...

Six species of Pluteus are reported from the African island nation, Republic of São Tomé and Príncipe. Two represent new species (P. hirtellus, P. thomensis) and the other four represent new distribution records. Comprehensive descriptions, line drawings, colour photographs, comparisons with allied taxa, a dichotomous key to aid identification, and...

Thirty-one species of gymnopoid fungi are reported from the African island nation, Republic of São Tomé and Príncipe. Ten represent new species (Arrhenia cystidiata, Callistosporium elegans, Campanella burkei, Gymnopus billbowesii, G. hirtelloides, G. irresolutus, G. mustachius, G. ocellus, G. pleurocystidiatus, G. rodhallii), four are new nomencla...

Tetrapyrgos atrocyanea, the type species of Tetrapyrgos, and Campanella buettneri, the type species of Campanella, are redescribed and epitypified based on recently collected material from Madagascar and Príncipe, respectively, supported with morphological and LSU, ITS sequences data. Line drawings, colour photographs, and comparisons with similar...

This poster was presented at Fungal Gentetics 2017 in Pacific Grove, California. The project goal was to assess the diversity and evolutionary relationships of Marasmius from Madagascar, and generate a monographic treatment for the country.

Prior to this monographic treatment, limited research on the genus Marasmius (Basidiomycota, Agaricales) had been conducted in Madagascar. Based on field work in January 2013 and January–February 2014, which generated 45 specimens of Marasmius sensu stricto, supplemented by herbarium exsiccatae and published literature, 35 species of Marasmius are...

Panaeolus antillarum is reported from material collected on wild elephant dung in Khao Yai National Park, Thailand. This new distribution report is supported with morphological and molecular sequence (ITS) data, line drawings, colour photographs and a comparison with material from the Antilles.

Four species of mycenoid fungi are reported as luminescent (or putatively luminescent) on the basis of specimens collected from São Paulo State, Brazil. Two of them represent new species (Mycena oculisnymphae, Resinomycena petarensis), and two represent new reports of luminescence in previously described species (M. deformis, M. globulispora). Comp...

Two new species of Mycena are described from California: Mycena nivicola, a spring taxon from the High Sierra Nevada and Cascade Ranges is proposed within section Hygrocyboideae, and M. bulliformis from the Coastal Ranges and Sierra Nevada Foothills is proposed in section Rubromarginatae. Both species are fully described, illustrated, and compared...

Eighteen dark-spored species representing members of the lineages Bolbitiaceae (Conocybe-1), Crepidotaceae (Crepidotus-2, Simocybe-1), Gymnopileae (Gymnopilus-2), Hymenogastraceae (Galerina-2), Psathyrellaceae (Coprinellus-2, Coprinopsis-2, Psathyrella-3), and Strophariaceae (Deconica-2, Hypholoma-1) are reported from the islands of São Tomé and Pr...

We formulate five guidelines for introducing new genera, plus one recommendation how to publish the results of scientific research. We recommend that reviewers and editors adhere to these guidelines. We propose that the underlying research is solid, and that the results and the final solutions are properly discussed. The six criteria are: (1) all g...

Tetrapyrgos (Basidiomycota, Agaricales) is recognized as a genus characterized by basidiomes with a central or eccentric, well-developed stipe with a black to bluish black stipe base arising from a basal pad or disc; hyaline, inamyloid, distinctly tetrahedral basidiospores; non-gelatinous or weakly gelatinous pileipellis and pileus tramal tissues;...

Twenty-five species of Inocybaceae are reported from Thailand and Malaysia. Thirteen are described as new from four different major clades of the family: I. errata from the Mallocybe clade, I. bicolorata and I. proxima from the Inosperma clade, I. neglecta from the Pseudosperma clade, and I. brevisquamulosa, I. fragilissima, I. latibulosa, I. linea...

Nine clavarioid-coralloid fungi and 14 gasteromycetes are reported from the islands of Sao Tome and Principe. Of these 23 species, 14 are first reports for the Republic. Minimal descriptions, color photographs and comparisons with allied taxa are provided.

Scytinopogon havencampii is described as new from material collected from a non-ectotrophic forest on the West African island of Príncipe. Diagnostic features include brown, non-flattened branches with white tips, small, white, ellipsoid, coarsely echinate basidiospores, 2-spored basidia, non-inflated hyphae, and brittle basidiomes that dry grayish...

Fifteen bioluminescent fungi recently collected from Peninsular Malaysia are analysed herein. The phylogeny of the Malaysian bioluminescent fungi and closely related taxa were evaluated with molecular data from the nuclear ribosom-al large subunit (LSU), RNA polymerase 2 second largest subunit (RPB2) and internal transcribed spacers (ITS) gene regi...

Boletus albobrunnescens and B. austroedulis are described as new species in section Boletus from Thailand and Australia respectively. The former is easily characterized by the pure white basidiomata that stain brown. Boletus austroedulis has a gray-brown, slightly rugulose pileus with hymeniform pileipellis producing pileocystidia, and the stipe is...

Three new species and one new variety of bioluminescent Mycena collected from Peninsular Malaysia are described herein. All new species belong to Mycena sect. Calodontes in what is known as the Mycena pura complex. Comprehensive descriptions, photographs, illustrations and comparisons with phenetically similar species are provided. Molecular sequen...

Pseudobaeospora wipapatiae is described as new based on material collected in alien wet habitats on the island of Hawaii. Unique features of this beautiful species include deep ruby-colored basidiomes with two-spored basidia, amyloid cheilocystidia and a hymeniderm pileipellis with abundant pileocystidia that is initially deep ruby in KOH then chan...

Molecular phylogenies using 1-4 gene regions and information on ecology, morphology and pigment chemistry were used in a partial revision of the agaric family Hygro- phoraceae. The phylogenetically supported genera we recognize here in the Hygrophoraceae based on these and previous analyses are: Acantholichen, Ampulloclitocybe, Arrhenia, Cantharell...

Phylogenetic placement of the infrageneric section Hygrometrici (genus Marasmius sensu stricto) in prior molecular phylogenetic studies have been unresolved and problematical. Molecular analyses based on newly generated ribosomal nuc-LSU and 5.8S sequences resolve members of section Hygrometrici to the family Physalacriaceae. The new genus Cryptoma...

Mycena illuminans Henn. is described and re-evaluated based on recently collected material from peninsular Malaysia, providing comprehensive descriptions, illustrations and photographs. In addition to morphological data, axenic monokaryon and dikaryon cultures were established to provide data on culture morphology and the mating system of the speci...

Agaricus murinocephalus is described and illustrated as a new species. This taxon, presently known only from Thailand, is characterized by a context that generally does not discolor on exposure, the lack of a phenolic odor, a cap covered by very fine, appressed, dark grey squamules outside the grey disc on a whitish background, and a broken collar-...

Sections Lanatuli and Atramentarii of the genus Coprinopsis contain some of the best known and most important agaric species, including C. cinerea and C. lagopus, yet a critical, phylogeny-based assessment of the species limits has not been carried out. Taxa have been characterized chiefly on the basis of morphological characters, which however sho...

In October 2010, a Colletotrichum species was isolated from white Phalaenopsis flowers growing in a greenhouse in San Francisco, CA. This Phalaenopsis is a common commercial orchid hybrid generated mostly likely from Phalaenopsis amabilis and P. aphrodite. The white petals showed anthracnose-like lesions where necrotic tissue is surrounded by a rin...

Since the early 20th century, many researchers have attempted to determine how fungi are able to emit light. The first successful experiment was obtained using the classical luciferin-luciferase test that consists of mixing under controlled conditions hot (substrate/luciferin) and cold (enzyme/luciferase) water extracts prepared from bioluminescent...

Summary — A new agaric species, Mycena moconensis, is described from Paranaense Rain Forest Argentina. This species is characterized by a small basidomata, yellow, orange yellow to golden pileus and magent to purple stipe, pip shaped spores and diverticulate cheilocystidia.

Since the early 20th century, many researchers have attempted to determine how fungi are able to emit light. The first successful experiment was obtained using the classical luciferin–luciferase test that consists of mixing under controlled conditions hot (substrate/luciferin) and cold (enzyme/luciferase) water extracts prepared from bioluminescent...

Agaricus flocculosipes is described as new from northern Thailand and Mayotte based on morphology and ITS sequence analysis. The new species is compared with similar taxa, and a comprehensive description, line drawings, and colored photographs are provided. Agaricus flocculosipes is distinguished among the species in section Arvenses by its relativ...

Agaricus flocculosipes is described as new from northern Thailand and Mayotte based on morphology and ITS sequence analysis. The new species is compared with similar taxa, and a comprehensive description, line drawings, and colored photographs are provided. Agaricus flocculosipes is distinguished among the species in section Arvenses by its relativ...

An updated, annotated list of earthstars found in the Hawaiian Islands is presented that includes 19 species of Geastrum and Myriostoma coliforme. Favored habitats for these gasteroid fungi include periodically wet windward coastal Casuarina groves, windward Leucaena thickets, and leeward coastal Prosopis groves. In contrast to these nonnative vege...

Agaricus (Basidiomycota) is a genus of saprobic fungi that includes edible cultivated species such as Agaricus bisporus, the button mushroom. There has been considerable ecological, nutritional and medicinal interest in the genus, yet the extent of its diversity remains poorly known, particularly in subtropical and tropical areas. Classification of...

Five new species of white-spored agarics are described from native montane wet forests in the Hawaiian Islands as follows: Callistosporium vinosobrunneum, Marasmiellus hapuuarum, Marasmius koae, Mycena marasmielloides, Pleurocybella ohiae. Comprehensive descriptions, illustrations and comparisons with phenetically similar species are provided. An i...

The bioluminescent agaric, Agaricus gardneri Berk., was rediscovered recently in central Brazil. The new combination, Neonothopanus gardneri, is proposed for this long-forgotten taxon supported by morphological and molecular data.

A gasteroid bolete collected recently in Sarawak on the island of Borneo is described as the new species Spongiforma squarepantsii. A comprehensive description, illustrations, phylogenetic placement and a comparison with a closely allied species are provided.

Nine species of marasmioid fungi are described from material collected in the Hawaiian islands: Marasmiellus pacificus, Marasmius pseudobambusinus var. hawaiiensis, and Marasmius radiatus are described as new; Marasmius sp. is described provisionally; Gloiocephala epiphylla, Marasmiellus mesosporus, and Marasmius androsaceus are first reports for t...

Using a combination of morphological and molecular data, the genus Micropsalliota is shown to represent a monophyletic lineage in the Agaricaceae sister to Hymenagaricus. Features that distinguish the genus from Agaricus and allied genera include usually small, gracile basidiomes with a membranous partial veil, dextrinoid basidiospores with an apic...

Seashore paspalum (Paspalum vaginatum Sw.) is a newly cultivated C4 turfgrass that has exceptional salinity tolerance and is highly suited for use on golf courses in coastal areas. In October 2008 and June 2009, circular patches of blighted seashore paspalum ranging from 30 cm to >3 m in diameter were observed in fairways, tees, and roughs establis...

Porcini (Boletus section Boletus: Boletaceae: Boletineae: Boletales) are a conspicuous group of wild, edible mushrooms characterized by fleshy fruiting bodies with a poroid hymenophore that is "stuffed" with white hyphae when young. Their reported distribution is with ectomycorrhizal plants throughout the Northern Hemisphere. Little progress has be...

The Hawaiian mushroom Rhodocollybia laulaha was selected as a model to investigate patterns of gene flow between geographically isolated fungal populations from ecologically and bioclimatically varied sites. Its morphology (distinctive when compared to other members of the genus) and affinity for endemic Hawaiian forest suggested that it was endemi...

Seven species of Mycena are reported as luminescent, representing specimens collected in Belize, Brazil, Dominican Republic, Jamaica, Japan (Bonin Islands), Malaysia (Borneo) and Puerto Rico. Four of them represent new species (Mycena luxaeterna, M. luxarboricola, M. luxperpetua, M. silvaelucens) and three represent new reports of luminescence in p...

Twenty-eight species in the family Lycoperdaceae, commonly called ‘puffballs’, are reported from Arizona, USA. In addition to widely distributed species, understudied species (e.g., Calvatia cf. leiospora and Holocotylon brandegeeanum) are treated. Taxonomic descriptions and illustrations, which include microscopic characters, are given for each sp...