In addition to S. cancrinum, S. cupressi and S. kenyanum we introduce S. neocupressi, which represents a lineage previously classified as S. cupressi (Barnes et al. 2001, Cunnington 2007, Tsopelas et al. 2007). Morphologically, conidia and appendages of S. neocupressi are longer compared to the genetically related S. cupressi, S. unicorne and S. cancrinum. Seiridium neocupressi includes canker pathogens primarily from Australia and New Zealand (Barnes et al. 2001, Cunnington 2007, Tsopelas et al. 2007), and most likely represents the most important causal agent of cypress canker in this region.