Since the first find of C. diatrypelloidea in New Zealand in 2016, the fungus has been associated with leaf necrosis on Eucalyptus sp., leaf necrosis on Corymbia ficifolia and leaf spot on Eucalyptus nitens. While Australian records of C. diatrypelloidea are from deand leaf litter (Summerell et al. 2006), the New Zealand detections are from fresh symptomatic leaf material indicating that C. diatrypelloidea could be plant pathogenic. However, further studies are needed to confirm pathogenicity of C. diatrypelloidea.ad branches (Adams et al. 2004)