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Two new Ophiostoma species with Sporothrix anamorphs from Austria and Azerbaijan

     Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0002 South Africa

Z. Wilhelm de Beer

     Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0002 South Africa

Thomas Kirisits

     Institute of Forest Entomology, Forest Pathology and Forest Protection (IFFF), Department of Forest and Soil Sciences, BOKU-University of Natural Resources and Applied Life Sciences, Vienna, Hasenauerstrasse 38, A-1190 Vienna, Austria

The genus Ophiostoma includes numerous species of primarily insect-vectored, wood-staining fungi. Several anamorph genera that differ in their micronematous or macronematous conidiogenous cells have been associated with Ophiostoma species. Among the former group, Sporothrix is associated with many species and is characterized by conidiogenous cells that arise laterally or terminally from any place on the hyphae and produce nonseptate conidia on sympodially developing denticles. The purpose of this study was to characterize ophiostomatoid isolates with Sporothrix anamorphs recently collected in Austria and Azerbaijan. The isolates were characterized based on comparisons of rDNA and ß-tubulin sequence data. Morphology, growth in culture, and sexual reproductive mode were also considered. Phylogenetic analyses of the combined sequence data showed that the isolates formed two distinct groups, one including isolates from Austria and the other isolates from Austria and Azerbaijan. Growth at 25 C and morphology revealed some differences between the two groups, and supported the view that they represent two new species, which we describe here as Ophiostoma fusiforme sp. nov. and Ophiostoma lunatum sp. nov. Both these groups phylogenetically were related to, but distinct from, Ophiostoma stenoceras.

Key words: DNA sequences, fusiforme, lunatum, nigrocarpum, phylogeny, sap staining, stenoceras

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