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- Mycosphaerella oblivia
- Mycosphaerella occulta
- Mycosphaerella octopetalae
- Mycosphaerella oculata
- Mycosphaerella oedema
- Mycosphaerella oerteliana
- Mycosphaerella ohnowa
- Mycosphaerella oleandri
- Mycosphaerella oleina
- Mycosphaerella olindensis
- Mycosphaerella omphalosporoides
- Mycosphaerella onobrychidis
- Mycosphaerella ontariensis
- Mycosphaerella ootheca
- Mycosphaerella operculata
- Mycosphaerella opuntiae
- Mycosphaerella orbicularis
- Mycosphaerella orchidearum
- Mycosphaerella ornithogali
- Mycosphaerella orobi
- Mycosphaerella osborniae
- Mycosphaerella osmundicola
- Mycosphaerella oxalidis
- Mycosphaerella oxyacanthae
- Mycosphaerella oxycocci
- Mycosphaerella oxyriae
Read more about this topic: List Of Mycosphaerella Species