The present paper contains taxonomic notes on some Cercosporella, Neoramularia, Phacellium, Pseudocercosporella, Ramularia and Thedgonia species. The conidiogenesis and the structure of the conidial scars in Ramularia and Tretovularia are discussed. The new genus Neoovularia is described (type species: Tuberculina nomuriana Sacc.). 17 new combinations, 1 new name and 1 new species are proposed.