Abstract
The Namib Desert (Namibia) is home to fairy circles which are barren, circular to almost-circular patches of land surrounded by grasses. During a survey of the fungi associated with the most common grass species, Stipagrostis ciliata (Poaceae), and its rhizospheric soils associated with these fairy circles, Curvularia was commonly isolated (80 strains). Curvularia is a cosmopolitan fungal genus that occurs in diverse geographical locations and on a wide range of substrates, but particularly on foliar plants. Curvularia strains were identified based on multilocus sequence comparisons of their internal transcribed spacer rDNA region (ITS), and the partial gene regions of glyceraldehyde-3-phosphate dehydrogenase (GAPDH) and translation elongation factor 1-alpha (TEF1). The strains belonged to 13 species, including the discovery of five novel Curvularia species. The aim of this paper was to report on the identified species and to formally describe and name the new species as C. deserticola, C. gobabebensis, C. maraisii, C. namibensis, and C. stipagrostidicola.
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