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Pezizomycetes are a class of fungi within the division Ascomycota.

Pezizomycetes are apothecial fungi, meaning that their spore-producing/releasing bodies (ascoma) are typically disk-like, bearing on their upper surfaces a layer of cylindrical spore-producing cells called asci, from which the spores are forcibly discharged.

Important groups include: cup fungi (Peziza), morels, Elfin saddles, and truffles.