(The specific epithet refers to the typical Septorial appearance of the fungus with its long filiform conidia produced holoblastically from short conidiogenous cells).

Sankaran, Sutton & Minter (1995) did not record any recognised species of Septoria on Eucalyptus. One other species of Septoria (S. pulcherrima Gadgil & Dick) has been described on Eucalyptus in New Zealand (Gadgil & Dick 1983). Septoria pulcherrima conidia are hyaline to very pale brown, 30-60 x 3-4 µm and the conidiogenesis is of two types: holoblastic with enteroblastic proliferation of the conidiogenous cell, and holoblastic with sympodial proliferation (Swart 1988). These characteristics distinguish it from S. typica which has hyaline conidia, 60-70 x 2-3 µm, with simple holoblastic condiogenesis without any proliferation of the condiogenous cells. The binomial Septoria pulcherrima has been subject to several name changes and is now variously known as Kirramyces eucalypti or Phaeophleospora eucalypti. This is a pity as S. pulcherrima causes a serious leaf blight in E. nitens and a stable nomenclature would help those investigating the disease.
Septoria typica is associated with necrotic leaf spots. Fruiting bodies of Cryptosporiopsis eucalypti are also frequently seen on these spots. It is likely that C. eucalypti, which is pathogenic to species of Eucalyptus (Sankaran, Sutton & Balasundaran 1995), is the primary agent responsible for the necrotic spots, with S. typica as a secondary invader.