Diderma effusum
- kingdom: Protozoa
- phylum: Mycetozoa
- class: Myxomycetes
- order: Physarales
- family: Didymiaceae
- genus: Diderma
- species: Diderma effusum
- Hinterzarten
Baden-Württemberg
Germany- Göteborg
Västra Götaland
Sweden- Manhattan
Kansas- Kittery Point
Maine- New Castle
New Hampshire- Clyde
- East Norwich
- Oyster Bay
- Syosset
New York- Kingston
Rhode Island
United States