Taxonomy and multigene phylogenetic evaluation of novel species in Boeremia and Epicoccum with new records of Ascochyta and Didymella (Didymellaceae)

Four microfungi collected from Italy and Russia are reported. Morphological examination revealed that all four species can be accommodated in the family Didymellaceae (Pleosporales) and more precisely in the genera Ascochyta, Boeremia, Didymella and Epicoccum. ITS, LSU, RPB2 and -TUB sequence data were analysed to investigate their phylogenetic relationships. Two new species, Boeremia galiicola and Epicoccum mackenziei are introduced, while Ascochyta medicaginicola and Didymella macrostoma are new records from Russia and Italy. A sexual stage is reported for the first time in Ascochyta medicaginicola. All taxa are described and illustrated with discussion on their taxonomic placement. Multigene phylogenetic analyses provide further evidence to support the introduction of these taxonomic novelties and their classification within the Didymellaceae.

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