Cotylidia undulata
- kingdom: Fungi
- phylum: Basidiomycota
- class: Agaricomycetes
- order: Hymenochaetales
- family: Rickenellaceae
- genus: Cotylidia
- species: Cotylidia undulata
Trollhättan
Västra Götaland
SwedenBaton Rouge
Louisiana
United States