New records of Diaporthales in Bulgaria. I

One genus (Ditopellina) and three species (Ditopellina saccardiana, Gnomonia nantensis, and G. rosae) of Diaporthales are reported as new to Bulgaria. Nine species (Apiognomonia errabunda, Apioplagiostoma carpinicolum, Apioporthella vepris, Ditopellina saccardiana, Gnomonia comari, G. nervisequa, G. rosae, Hypospilina pustula, and Plagiostoma arnastadtiense) are established on new substrata, and 21 species are recorded from new Bulgarian localities.