Publications by authors named "R Lebeuf"
Several members of the genus sensu stricto occur at the edge of melting snow. These nivicolous species have been widely reported in the Northern Hemisphere and are also known from Australia and New Zealand. We have used 16 specimens from North America and Australia to study morphology and to perform DNA sequencing.
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- The study describes numerous new species of fungi discovered across various environments, including leaf spots, dead insects, soil, and wood from diverse locations around the world.
- The fungi were isolated from multiple substrates, such as decaying organic matter, living plants, and even specific habitats like semi-desert montane areas and mixed forests.
- Morphological traits and genetic analysis through DNA barcoding confirm the classification and distinct characteristics of these fungal species.
A multigene phylogenetic assessment of North American species of is presented based on analyses of ITS, and 28S rDNA nucleotide data. This framework enables a systematic revision of the genus for 16 eastern North American species and captures taxonomic and phylogenetic diversity in a global context. A grade of two unusual and poorly known North American species stems from the most recent common ancestor of the genus that gives rise to three core subgroups named here as clades Unicolores, Nothosperma, and Mallocybe.
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- The study focused on the taxonomy of specific species using both morphological and molecular data, leading to the identification of 19 confirmed species across Europe, Asia, and North America.
- Six new species and one new variety were described, and a variety was elevated to a species level.
- The research also involved the reassessment of previous classifications, leading to the resurrection of certain names and the synonymization of others, while enhancing the understanding of morphology and distribution of the species.
Article Synopsis
- The study examines the taxonomy and morphology of Holarctic species within the /romellii clade using both morphological and molecular data, confirming several species classifications.
- The species is recognized as exclusively Eurasian, with others identified as synonyms, while another is designated a separate North American species.
- Five new species are introduced, with identification criteria based on characteristics like basidioma size and geographical distribution, highlighting the importance of molecular data for accurate classification.