Rhizomarasmius pyrrhocephalus
- kingdom: Fungi
- phylum: Basidiomycota
- class: Agaricomycetes
- order: Agaricales
- family: Physalacriaceae
- genus: Rhizomarasmius
- species: Rhizomarasmius pyrrhocephalus
- Brossard
Quebec
Canada- Geneseo
Illinois- New Orleans
Louisiana- Borough of Bronx
- Hyde Park
New York- Bell Acres
Pennsylvania
United States