Six species of Mycosphaerella and eight anamorphs with unknown Mycosphaerella states occurring on myrtaceous hosts other than Eucalyptus are treated in the present study. Eight additional species that have recently been described elsewhere are discussed, while a further six species remain unconfirmed, and two are excluded from Mycosphaerella. New species are described in Mycosphaerella, Mycovellosiella, Passalora, Pseudocercospora and Stenella, and new combinations proposed in Eruptio and Microthyrium. Keys are provided to distinguish the accepted species occurring on Myrtaceae other than Eucalyptus, while their morphological similarities with taxa known from this host are discussed.