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IMA Fungus. 2011 Jun;2(1):1-6. doi: 10.5598/imafungus.2011.02.01.01. Epub 2011 Mar 10.

Annulatascus nilensis sp. nov., a new freshwater ascomycete from the River Nile, Egypt.

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Department of Botany, Faculty of Science, Sohag University, Sohag 82524, Egypt;


Annulatascus nilensis sp. nov., from freshwater habitats in Egypt, is described, illustrated and compared to other species in the genus. Phylogenetic analyses of its LSU rDNA sequence with similar fungi placed the new species in the genus Annulatascus (Annulatascaceae, Sordariomycetidae incertae sedis). Annulatascus nilensis is characterized by immersed ascomata with an ascomatal neck oriented horizontally to the substrate surface, asci with a long, narrow stalk and massive bipartite apical ring, and 5-11-septate, hyaline ascospores surrounded by a large irregular, granular sheath that is not seen in water.


Ascomycota; Phragmites; Sordariomycetes; molecular phylogeny; subtropics

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