 Species belonging to "Mycosphaerella" were characterised as having pseudothecial ascomata that can be immersed or superficial, embedded in host tissue or erumpent, having ostiolar periphyses, but lacking interascal tissue at maturity.Ascospores are hyaline, but in some cases slightly pigmented and predominantly 1-septate, although taxa with 3-septate ascospores have been recorded.This description appears to be quite distinctive, but is in fact very broad and actually lead to 120 years of confusion in which the generic name "Mycosphaerella" was being used as a dumping ground for small loculoascomycetes with few distinct morphological traits.