Abstract
A new species Alfaria avenellae, is described, illustrated and compared with other Alfaria species. Evidence for the new species is provided by morphological comparison and sequence data analyses. Alfaria avenellae can easily be distinguished from other Alfaria species by its distinct synnemata, long conidiophores (up to 350 mu m) and pale green to dark green conidia. Phylogenetic analysis of combined LSU and ITS sequence data was carried out to determine the phylogenetic placement of this new species within the genus Alfaria and provide evidence to support the establishment of our new species.