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Persistent hamathecial threads in the Nectriaceae, Hypocreales: Thyronectria revisited and re-instated Naturalis
Jaklitsch, W.M.; Voglmayr, H..
Based on type studies and freshly collected material we here re-instate the genus Thyronectria (Nectriaceae, Hypocreales). Species of this genus were recently for the most part classified in the genera Pleonectria (Nectriaceae) or Mattirolia (Thyridiaceae), because Thyronectria and other genera had been identified as members of the Thyridiaceae due to the presence of paraphyses. Molecular phylogenies based on several markers (act, ITS, LSU rDNA, rpb1, rpb2, tef1, tub) revealed that the Nectriaceae contain members whose ascomata are characterised by long, more or less persistent, apical paraphyses. All of these belong to a single genus, Thyronectria, which thus has representatives with hyaline, rosy, green or even dark brown and sometimes distoseptate...
Tipo: Article / Letter to the editor Palavras-chave: Act; Ascomycota; Hypocreales; Mattirolia; Nectriaceae; New species; Pleonectria; Pyrenomycetes; Rpb1; Rpb2; Tef1; Tub; Thyridiaceae; Thyridium; Thyronectroidea.
Ano: 2014 URL: http://www.repository.naturalis.nl/record/531696
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Phylogeny of Sarocladium (Hypocreales) Naturalis
Giraldo, A.; Gené, J.; Sutton, D.A.; Madrid, H.; Hoog, G.S. de; Cano, J.; Decock, C.; Crous, P.W.; Guarro, J..
The circumscription of the genus Acremonium (Hypocreales) was recently reviewed on the basis of a DNA phylogenetic study. Several species were subsequently transferred to Sarocladium, but the relationships between both genera remained unresolved. Based on multilocus phylogenetic inferences combined with phenotypic data, we have revised the species concepts within Sarocladium and some genetically related species of Acremonium. As a result of these studies, six species are described as new, viz. S. bifurcatum, S. gamsii, S. hominis, S. pseudostrictum, S. subulatum and S. summerbellii. In addition, the new combinations S. implicatum and S. terricola are proposed for A. implicatum and A. terricola, respectively. Sarocladium attenuatum is confirmed as synonym...
Tipo: Article / Letter to the editor Palavras-chave: Acremonium; Hypocreales; Phylogeny; Sarocladium; Taxonomy.
Ano: 2015 URL: http://www.repository.naturalis.nl/record/560052
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Roselliniella revealed as an overlooked genus of Hypocreales, with the description of a second species on parmelioid lichens Naturalis
Hawksworth, D.L.; Millanes, A.M.; Wedin, M..
Based on newly obtained 28S rDNA sequences from Roselliniella atlantica and R. euparmeliicola sp. nov., the genus Roselliniella has to be placed in Hypocreales and not in Sordariales; however, the family placement could not be resolved from the sequences obtained. The mature ascospores are single-celled and brown, but young ascospores are hyaline and sometimes have a median septum. The new species occurs on a Parmelia s.str. species in China, and differs in 24 nucleotide substitution positions in the nu-LSU rDNA region and ascospore size from R. atlantica. In this case, small variations in ascospore sizes and shape prove to be phylogenetically and taxonomically informative. The two species occur in the same clade with 95 % jack-knife support. Roselliniella...
Tipo: Article / Letter to the editor Palavras-chave: Ascomycota; Endolichenic fungi; Hypocreales; Lichenicolous fungi; Parmelia; Sordariales; Xanthoparmelia.
Ano: 2010 URL: http://www.repository.naturalis.nl/record/531870
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Trichoderma (Hypocrea) species with green ascospores from China Naturalis
Zhu, Z.X.; Zhuang, W.Y..
Stromata of Trichoderma species having green ascospores were collected in various regions of China. Based on morphology of the sexual and asexual morph, culture characteristics, and sequence analyses of rpb2 and tef1 genes, 17 species with green ascospores were identified. Among them, Trichoderma rosulatum, T. rufobrunneum and T. stipitatum are described as new species, and seven other species are reported for the first time from China. Trichoderma rosulatum produces small bright yellow or pale greenish stromata with dense dark green ostioles and gliocladium-like conidiophores, shows a close relationship to T. thelephoricola, and belongs to the Chlorospora clade. Trichoderma rufobrunneum, which typically forms reddish brown stromata, is recognised as a...
Tipo: Article / Letter to the editor Palavras-chave: Ascomycota; Hypocreales; ITS; Morphology; Rpb2; Sequence analysis; Systematics; Tef1.
Ano: 2015 URL: http://www.repository.naturalis.nl/record/560056
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