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School of Biological Sciences, King Henry Building, University of Portsmouth, Portsmouth, PO1 2DY, United Kingdom
L. Cai
Centre for Research in Fungal Diversity, Department of Ecology & Biodiversity, University of Hong Kong, Pokfulam Road, Hong Kong, SAR, PR China
E. C. Y. Liew
School of Land, Water & Crop Sciences, McMillan Building A05, University of Sydney, NSW 2006, Australia
K. Q. Zhang
Laboratory for conservation and Utilization of Bio-resource, Yunnan University, Kunming, Yunnan, PR China
K. D. Hyde
Centre for Research in Fungal Diversity, Department of Ecology & Biodiversity, University of Hong Kong, Pokfulam Road, Hong Kong, SAR, PR China
A new taxon with Dyrithium-like characteristics was collected from Lake Fuxian in China. The taxon is typical of the Amphisphaeriaceae in that it has relatively large, ostiolate, immersed ascomata, unitunicate asci with a J+ subapical ring, and brown ascospores. It is similar to Dyrithium in that it has muriform ascospores, but considerable confusion surrounds this genus. In Dyrithium asci are bitunicate and lack a J+ subapical ring, while this was not true of our species. A new genus, Dyrithiopsis, therefore is established to accommodate this new taxon. Details of its anamorph also are provided, based on cultural studies. Parsimony analyses of part of the large-subunit rDNA provide further evidence to support the familial placement of this new genus in the Amphisphaeriaceae. The taxonomic position of Dyrithium also is discussed.
Key words: Amphisphaeriaceae, anamorph, Pestalotiopsis, phylogeny, rDNA
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