11 ȆǩǰdzǭDZǵǨ ǵǨǻǿǵǨ DzǶǵǼǭǸǭǵǾǰȇ ǷǶ ǭDzǶdzǶǫǰȇ (ǹǩǶǸǵǰDz ǹ ǬǶDzdzǨǬǰ) ǸȍȌ. ǰȓиȈȕȈ ǫ. ǪȍȓчȍȊȈ, Ǩȕȋȍȓ ǫ. ǾȍȒȖȊ ● ǷȓȖȊȌиȊ, 1 Ȋи ȕȖȍȔȊȘи 2008 ● șȚȘ. 11-20 PROCEEDINGS OF THE ANNIVERSARY SCIENTIFIC CONFERENCE OF ECOLOGY Eds. Iliana G. Velcheva, Angel G. Tsekov ● Plovdiv, November 1 st 2008 ● p. 11-20 NEW DATA ON PYRENOMYCETOUS FUNGI OF BULGARIA Dimitar Y. Stoykov, Boris G. Assyov Department of Mycology, Institute of Botany, Bulgarian Academy of Sciences, 23, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria, E-mail: stoikov@bio.bas.bg Abstract. New records and/or plant substrata of 16 saprophytic pyrenomycetous fungi of Botryosphaeriaceae (Bortyosphaeria visci), Gnomoniaceae (Apiognomonia veneta, Gnomonia betulina, G. comari, G. geranii, G. gnomon, G. leptostyla, G. setacea, Hypospilina pustula, Plagiostoma inclinatum), Phaeosphaeriaceae (Leptosphaeria doliolum, Nodulosphaeria dolioloides, N. modesta,), Pleosporaceae (Pleospora herbarum), Melanconidaceae (Melanconis modonia) and Montagnulaceae (Paraphaeosphaeria glauco-punctata) are recorded in Bulgaria. Leptosphaeria doliolum is reported on dead stems of Agrimonia eupatoria. All taxa are presented with brief chorological data and notes on their distribution in the country. Some are briefly described. Key words: ascomycetes, Melanconis, Paraphaeosphaeria, Pleospora, saprotrophs INTRODUCTION The research of the pyrenomycetes (s. lat.) in Bulgaria dates back to the beginning of the 20 th century (ATANASOV & PETROV, 1930). Those investigations were related with the development of the phytopathology in Bulgaria until 70’s. In the last 30 years systematic researches on some pyrenomycetous groups has begun, e.g. Erysiphales, some genera of Diaporthales (Apiognomonia, Apioplagiostoma, Gnomonia, Plagiostoma, Pseudovalsa, etc.), Dothideales (Mycosphaerella, Pleospora, Leptosphaeria, Nodulosphaeria), etc. (FAKIROVA, 1978, 1982, 1985, 1991, 1992, 1993a, b, 1994, 1995a, b, 1996, 1997; STOYKOV, 2004, STOYKOV & ASSYOV, 2006; STOYKOV & DENCHEV, 2006, etc.). Some pyrenomycetes, mainly in their anamorphic stages, cause serious economic diseases affecting ornamental plants or plant crops: Apiognomonia veneta (ROSNEV 1981), G. leptostyla (ROSNEV & TSANOVA, 1980), Melanconis modonia, Cryphonectria parasitica (ROSNEV & ZAHOV, 1982; PETKOV & ROSNEV, 2001), etc.