Ribosomal gene phylogeny and species delimitation in Geotrichum and its teleomorphs

A taxonomic revision is presented of all filamentous Hemiascomycetes that reproduce with predominantly arthric conidiogenesis. On the basis of SSU rDNA data, two widely divergent groups (1 and 2) are known to exist. Both are distantly related to the Hemiascomycetes, and show remarkable diversity in ITS rDNA, leading to the supposition that phylogenetically ancient fungi are concerned. The teleomorph / anamorph genera occurring in Groups 1 vs. 2 are classified in (1) Galactomy- ces and Dipodascus with Geotrichum anamorphs, vs. (2) Magnusiomyces with Saprochaete anamorphs. Taxonomy at the

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