- Agrocybe praecox
- Abortiporus biennis
- Agaricus arvensis
- Amanita fulva
- Amanita gemmata
- Amanita muscaria
- Amanita phalloides
- Amanita porphyria
- Amanita rubescens
- Anthina flammea
- Antrodia ramentacea
- Armillaria borealis
- Armillaria ostoyae
- Artomyces pyxidatus
- Ascocoryne cylichnium
- Ascocoryne sarcoides
- Auriculariopsis ampla
- Aurantiporus fissilis
- Aureoboletus projectellus
- Auricularia auricula-judae
- Auriscalpium vulgare