In the phylogenetic tree of nucleotide sequences, E. rostratum forms a monophyletic group with other Exserohilum species, which could be separated with the genera Bipolaris and Curvularia.

• 从系统发育树中可以看出，供试菌株与突脐孢属的其它菌种聚类在同一个分支上，与弯孢属和离蠕孢属的菌种明显区分开，形成了一个独立演化群。