Agaricus micromegethus
- kingdom: Fungi
- phylum: Basidiomycota
- class: Agaricomycetes
- order: Agaricales
- family: Agaricaceae
- genus: Agaricus
- species: Agaricus micromegethus
- Banff
Alberta
Canada- Palos Park
Illinois- Manhattan
Kansas- Milton
Massachusetts- Seattle
Washington
United States