<Emphasis Type="Italic">Ruwenzoria</Emphasis>, a new genus of the Xylariaceae from Central Africa |
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Authors: | Marc Stadler Jacques Fournier Thomas Læssøe Cony Decock Derek Per?oh Gerhard Rambold |
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Institution: | 1.Lehrstuhl für Pflanzensystematik, Department Mycology,University of Bayreuth,Bayreuth,Germany;2.InterMed Discovery GmbH,Dortmund,Germany;3.Las Muros,Rimont,France;4.Department of Biology,University of Copenhagen,Copenhagen ?,Denmark;5.Mycothèque de l’ Université catholique de Louvain (BCCM/MUCL, MBLA),Université catholique de Louvain,Louvain-la-Neuve,Belgium;6.Systematische Botanik und Mykologie,Ludwig-Maximilians-Universit?t München,München,Germany |
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Abstract: | During a foray to the mountain rainforests of the Democratic Republic of the Congo, a peculiar species of Xylariaceae was
found, which could not be accommodated in any of the existing genera. It is recognised as representative of a new genus, named
Ruwenzoria, owing to the presence of a new combination of teleomorphic and anamorphic characters that are regarded as significant for
generic segregation within the Xylariaceae. Studies on its secondary metabolites in stromata and cultures by high performance
liquid chromatography, coupled with diode array and mass spectrometric detection (HPLC-DAD/MS), and on its phylogenetic affinities
based on 5.8S/ITS rDNA sequence data, respectively, revealed a close relationship of the new taxon to the genera Daldinia and Entonaema, from which it differs by having neither a hollow, gelatinous nor a conspicuously zonate stromatal interior, and an anamorph
featuring enteroblastic rather than holoblastic conidiogenesis. A specimen from the same geographic region, previously identified
as Daldinia bakeri by R.W.G. Dennis was found to constitute a mixture of stromata of Ruwenzoria and an additional, undescribed Daldinia species. The latter fungus is not formally described due to the scantiness of the material, but its morphological characteristics
are illustrated. |
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