Crassistoma norvegicum (Crassistomataceae), a new genus, species and family of Pleosporales from Norway
Peer reviewed, Journal article
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https://hdl.handle.net/11250/3174287Utgivelsesdato
2024Metadata
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Sammendrag
Recent field surveys of Ascomycota in Norway revealed a corticolous pyrenomycetoid species with superficial, black, obpyriform ascomata, bitunicate asci and thick-walled brown, fusoid, bicellular ascospores, somewhat reminding of the North American Trematosphaeria cariosa. However, T. cariosa differs ecologically by growing on dead wood rather than on bark of a living tree, and comparison with the holotype of T. cariosa revealed that the Norwegian fungus differed by rounded-obpyriform vs. conical ascomata, a less carbonaceous peridium with a more uneven/rough surface and often with a basal thin tomentum, nonporate ostiolar papilla with bumpy-warty ridge- to collar-like structures and apically free paraphyses and smaller ascospores with a much narrower and lighter brown equatorial zone at the septum, indicating that both represent distinct species. Molecular phylogenetic analyses of a representative multigene LSU-SSU-RPB2-TEF1 matrix of Pleosporales revealed an isolated position of the Norwegian fungus, remote from the generic type of Trematosphaeria, and it is therefore described as a new genus and species, Crassistoma norvegicum, within a new family, Crassistomataceae. Molecular phylogeny, Pleosporales, Taxonomy, Trematosphaeria. – 1 new family, 1 new genus, 1 new species