Mycosphaerella cydoniae. Mycosphaerella cydoniae je grzib, co go ôpisoł Grove 1918. "Mycosphaerella cydoniae" nŏleży do zorty "Mycosphaerella" i familije Mycosphaerellaceae. Żŏdne podgatōnki niy sōm wymianowane we Catalogue of Life.