Donald Pfister - Academia.edu (original) (raw)

Papers by Donald Pfister

Research paper thumbnail of Systematic revision of the genera Holwaya and Patinella (Ascomycota) based on phylogenetic traits

Research paper thumbnail of Systemic Infection of Medeola virginiana (Liliaceae) by the Fungus Medeolaria farlowii (Ascomycota: Leotiomycetes)

Research paper thumbnail of A New Noncoprophilous Species of Thecotheus, T. phycophilus

Mycologia, Sep 1, 1981

... Field work at Lake Itasca, Minnesota, was possible through the courtesy of the Field Biology ... more ... Field work at Lake Itasca, Minnesota, was possible through the courtesy of the Field Biology Program of the University of Minnesota. The work was completed under National Science Foundation Grant DEB 8023018 to the author. ... Mycologia 61: 99-114. Pfister, DH 1972. ...

Research paper thumbnail of The Psilopezioid Fungi. I. History, Nomenclature, and Delimitation of the Psilopezioid Genera

Research paper thumbnail of The Psilopezioid Fungi. III. The Genus Psilopezia (Pezizales)

American Journal of Botany, Apr 1, 1973

Research paper thumbnail of The Caloscyphaceae (Pezizomycetes, Ascomycota), with a new genus

Mycological Progress, Dec 9, 2012

Research paper thumbnail of The Psilopezioid Fungi. II. Thecotheus rivicola comb. nov. and Other Iodophaneae (Pezizales) Occurring on Water-Soaked Wood

Bulletin of the Torrey Botanical Club, Jul 1, 1972

Research paper thumbnail of Phylogeny of<i>Cyttaria</i>inferred from nuclear and mitochondrial sequence and morphological data

Research paper thumbnail of A phylogenetic overview of the family Pyronemataceae (Ascomycota, Pezizales)

Mycological research, May 1, 2007

Research paper thumbnail of Phylogenetic study documents different speciation mechanisms within the Russula globispora lineage in boreal and arctic environments of the Northern Hemisphere

Research paper thumbnail of Influence of Elytral Colour Pattern, Size, and Sex of <em>Harmonia axyridis</em> (Coleoptera, Coccinellidae) on Parasite Prevalence and Intensity of <em>Hesperomyces virescens</em> (Ascomycota, Laboulbeniales)

Harmonia axyridis is an invasive ladybird (Coleoptera, Coccinellidae) with the potential to outco... more Harmonia axyridis is an invasive ladybird (Coleoptera, Coccinellidae) with the potential to outcompete native ladybird species in its invasive distribution area. It was introduced as a biological control agent in many countries but has also spread unintentionally in many others. Hesperomyces virescens (Ascomycota, Laboulbeniales) is a minute (200–400 µm in size) biotrophic fungus that infects over 30 species of ladybirds. The aim of this study was to evaluate whether elytral colour pattern, size, and sex of Ha. axyridis affect infection by H. virescens. Colouration in Ha. axyridis has been linked to the presence of an antimicrobial alkaloid (harmonine). In fall 2016, we collected 763 Ha. axyridis individuals in Cambridge, Massaschusetts, of which 119 (16%) bore H. virescens fruiting bodies. We analysed 160 individuals concerning prevalence and intensity of infection by H. virescens. Elytral sizes and colouration patterns were quantified using digital photography and anal...

Research paper thumbnail of Rickiella edulis and its phylogenetic relationships within Sarcoscyphaceae

Research paper thumbnail of Extensive intragenomic variation in the internal transcribed spacer region of fungi

Research paper thumbnail of Hesperomyces (Fungi, Ascomycota) associated with Hyperaspis ladybirds (Coleoptera, Coccinellidae): Rethinking host specificity

Frontiers in Fungal Biology

Laboulbeniales (Ascomycota, Laboulbeniomycetes) are biotrophic microfungi always attached to the ... more Laboulbeniales (Ascomycota, Laboulbeniomycetes) are biotrophic microfungi always attached to the exoskeleton of their arthropod hosts. They do not form hyphae or a mycelium; instead, they undergo determinate growth, developing from a two-celled ascospore to form a multicellular thallus. Hesperomyces virescens has been reported on over 30 species of ladybirds (Coleoptera, Coccinellidae); in reality, it represents a complex of species, presumably segregated by host genus association. In this study, we report on Hesperomyces thalli on Hyperaspis vinciguerrae from the Canary Islands and compare them with the Hesperomyces hyperaspidis described on Hyperaspis sp. from Trinidad. We generated the sequences of the internal transcribed spacer (ITS) region, the large subunit (LSU) nuclear ribosomal RNA gene, and the minichromosome maintenance complex component 7 (MCM7) protein-coding gene. Our phylogenetic reconstruction of Hesperomyces based on a concatenated ITS–LSU–MCM7 dataset revealed Hes...

Research paper thumbnail of A review of Hyphodiscaceae

Studies in Mycology

In a recently published classification scheme for Leotiomycetes, the new family Hyphodiscaceae wa... more In a recently published classification scheme for Leotiomycetes, the new family Hyphodiscaceae was erected; unfortunately, this study was rife with phylogenetic misinterpretations and hampered by a poor understanding of this group of fungi. This manifested in the form of an undiagnostic familial description, an erroneous familial circumscription, and the redescription of the type species of an included genus as a new species in a different genus. The present work corrects these errors by incorporating new molecular data from this group into phylogenetic analyses and examining the morphological features of the included taxa. An emended description of Hyphodiscaceae is provided, notes and descriptions of the included genera are supplied, and keys to genera and species in Hyphodiscaceae are supplied. Microscypha cajaniensis is combined in Hyphodiscus, and Scolecolachnum nigricans is a taxonomic synonym of Fuscolachnum pteridis. Future work in this family should focus on increasing phyl...

Research paper thumbnail of Atkinson, Farlow, and the later starting point debate

Occasional papers of the Farlow Herbarium of Cryptogamic Botany.

Research paper thumbnail of Taxonomic review of the genus Holwaya (Ascomycota, Fungi)

13th Croatian Biological Congress with international participation - Book of abstracts, 2018

Research paper thumbnail of A note on Phaeofabraea and its placement in the Leotiaceae subfamily Encoelioideae (Discomycetes)

Occasional Papers of the Farlow Herbarium of Cryptogamic Botany, 1977

Research paper thumbnail of Developing an Exemplary Collection: A Vision for the Next Century at the Arnold Arboretum of Harvard University

Harvard University not only support the Arboretum’s mission by serving key research, education, a... more Harvard University not only support the Arboretum’s mission by serving key research, education, and conservation roles, but in their entirety represent one of the very best examples of a historic Olmsted landscape. With some 15,000 accessioned plants, representing almost 4,000 unique taxa that include 2,100 species, the Living Collections of the Arnold Arboretum remain a major destination for those who study and enjoy woody plants. Of the accessions brought to the Arboretum from elsewhere, 44% are of wild origin, hailing from over 60 different temperate countries. Another 39% are of cultivated origin, including pedigreed hybrids, nursery-origin introductions, and accessions from other gardens. This historic interplay between taxonomic, floristic, and cultivated diversities has resulted in one of the most comprehensive and heavily documented collections of temperate woody plants in the world. The living collections are central to the Arnold Arboretum—all research, education, and cons...

Research paper thumbnail of Insights into Claussenomyces Kirschst.: Past, Present and Future

Research paper thumbnail of Systematic revision of the genera Holwaya and Patinella (Ascomycota) based on phylogenetic traits

Research paper thumbnail of Systemic Infection of Medeola virginiana (Liliaceae) by the Fungus Medeolaria farlowii (Ascomycota: Leotiomycetes)

Research paper thumbnail of A New Noncoprophilous Species of Thecotheus, T. phycophilus

Mycologia, Sep 1, 1981

... Field work at Lake Itasca, Minnesota, was possible through the courtesy of the Field Biology ... more ... Field work at Lake Itasca, Minnesota, was possible through the courtesy of the Field Biology Program of the University of Minnesota. The work was completed under National Science Foundation Grant DEB 8023018 to the author. ... Mycologia 61: 99-114. Pfister, DH 1972. ...

Research paper thumbnail of The Psilopezioid Fungi. I. History, Nomenclature, and Delimitation of the Psilopezioid Genera

Research paper thumbnail of The Psilopezioid Fungi. III. The Genus Psilopezia (Pezizales)

American Journal of Botany, Apr 1, 1973

Research paper thumbnail of The Caloscyphaceae (Pezizomycetes, Ascomycota), with a new genus

Mycological Progress, Dec 9, 2012

Research paper thumbnail of The Psilopezioid Fungi. II. Thecotheus rivicola comb. nov. and Other Iodophaneae (Pezizales) Occurring on Water-Soaked Wood

Bulletin of the Torrey Botanical Club, Jul 1, 1972

Research paper thumbnail of Phylogeny of<i>Cyttaria</i>inferred from nuclear and mitochondrial sequence and morphological data

Research paper thumbnail of A phylogenetic overview of the family Pyronemataceae (Ascomycota, Pezizales)

Mycological research, May 1, 2007

Research paper thumbnail of Phylogenetic study documents different speciation mechanisms within the Russula globispora lineage in boreal and arctic environments of the Northern Hemisphere

Research paper thumbnail of Influence of Elytral Colour Pattern, Size, and Sex of <em>Harmonia axyridis</em> (Coleoptera, Coccinellidae) on Parasite Prevalence and Intensity of <em>Hesperomyces virescens</em> (Ascomycota, Laboulbeniales)

Harmonia axyridis is an invasive ladybird (Coleoptera, Coccinellidae) with the potential to outco... more Harmonia axyridis is an invasive ladybird (Coleoptera, Coccinellidae) with the potential to outcompete native ladybird species in its invasive distribution area. It was introduced as a biological control agent in many countries but has also spread unintentionally in many others. Hesperomyces virescens (Ascomycota, Laboulbeniales) is a minute (200–400 µm in size) biotrophic fungus that infects over 30 species of ladybirds. The aim of this study was to evaluate whether elytral colour pattern, size, and sex of Ha. axyridis affect infection by H. virescens. Colouration in Ha. axyridis has been linked to the presence of an antimicrobial alkaloid (harmonine). In fall 2016, we collected 763 Ha. axyridis individuals in Cambridge, Massaschusetts, of which 119 (16%) bore H. virescens fruiting bodies. We analysed 160 individuals concerning prevalence and intensity of infection by H. virescens. Elytral sizes and colouration patterns were quantified using digital photography and anal...

Research paper thumbnail of Rickiella edulis and its phylogenetic relationships within Sarcoscyphaceae

Research paper thumbnail of Extensive intragenomic variation in the internal transcribed spacer region of fungi

Research paper thumbnail of Hesperomyces (Fungi, Ascomycota) associated with Hyperaspis ladybirds (Coleoptera, Coccinellidae): Rethinking host specificity

Frontiers in Fungal Biology

Laboulbeniales (Ascomycota, Laboulbeniomycetes) are biotrophic microfungi always attached to the ... more Laboulbeniales (Ascomycota, Laboulbeniomycetes) are biotrophic microfungi always attached to the exoskeleton of their arthropod hosts. They do not form hyphae or a mycelium; instead, they undergo determinate growth, developing from a two-celled ascospore to form a multicellular thallus. Hesperomyces virescens has been reported on over 30 species of ladybirds (Coleoptera, Coccinellidae); in reality, it represents a complex of species, presumably segregated by host genus association. In this study, we report on Hesperomyces thalli on Hyperaspis vinciguerrae from the Canary Islands and compare them with the Hesperomyces hyperaspidis described on Hyperaspis sp. from Trinidad. We generated the sequences of the internal transcribed spacer (ITS) region, the large subunit (LSU) nuclear ribosomal RNA gene, and the minichromosome maintenance complex component 7 (MCM7) protein-coding gene. Our phylogenetic reconstruction of Hesperomyces based on a concatenated ITS–LSU–MCM7 dataset revealed Hes...

Research paper thumbnail of A review of Hyphodiscaceae

Studies in Mycology

In a recently published classification scheme for Leotiomycetes, the new family Hyphodiscaceae wa... more In a recently published classification scheme for Leotiomycetes, the new family Hyphodiscaceae was erected; unfortunately, this study was rife with phylogenetic misinterpretations and hampered by a poor understanding of this group of fungi. This manifested in the form of an undiagnostic familial description, an erroneous familial circumscription, and the redescription of the type species of an included genus as a new species in a different genus. The present work corrects these errors by incorporating new molecular data from this group into phylogenetic analyses and examining the morphological features of the included taxa. An emended description of Hyphodiscaceae is provided, notes and descriptions of the included genera are supplied, and keys to genera and species in Hyphodiscaceae are supplied. Microscypha cajaniensis is combined in Hyphodiscus, and Scolecolachnum nigricans is a taxonomic synonym of Fuscolachnum pteridis. Future work in this family should focus on increasing phyl...

Research paper thumbnail of Atkinson, Farlow, and the later starting point debate

Occasional papers of the Farlow Herbarium of Cryptogamic Botany.

Research paper thumbnail of Taxonomic review of the genus Holwaya (Ascomycota, Fungi)

13th Croatian Biological Congress with international participation - Book of abstracts, 2018

Research paper thumbnail of A note on Phaeofabraea and its placement in the Leotiaceae subfamily Encoelioideae (Discomycetes)

Occasional Papers of the Farlow Herbarium of Cryptogamic Botany, 1977

Research paper thumbnail of Developing an Exemplary Collection: A Vision for the Next Century at the Arnold Arboretum of Harvard University

Harvard University not only support the Arboretum’s mission by serving key research, education, a... more Harvard University not only support the Arboretum’s mission by serving key research, education, and conservation roles, but in their entirety represent one of the very best examples of a historic Olmsted landscape. With some 15,000 accessioned plants, representing almost 4,000 unique taxa that include 2,100 species, the Living Collections of the Arnold Arboretum remain a major destination for those who study and enjoy woody plants. Of the accessions brought to the Arboretum from elsewhere, 44% are of wild origin, hailing from over 60 different temperate countries. Another 39% are of cultivated origin, including pedigreed hybrids, nursery-origin introductions, and accessions from other gardens. This historic interplay between taxonomic, floristic, and cultivated diversities has resulted in one of the most comprehensive and heavily documented collections of temperate woody plants in the world. The living collections are central to the Arnold Arboretum—all research, education, and cons...

Research paper thumbnail of Insights into Claussenomyces Kirschst.: Past, Present and Future