Spirogyra dubia
- kingdom: Plantae
- phylum: Charophyta
- class: Zygnematophyceae
- order: Zygnematales
- family: Zygnemataceae
- genus: Spirogyra
- species: Spirogyra dubia
Oak Bay
British Columbia
Canada
Sabana Grande
Sabana Grande
Puerto Rico
Dutch Harbor
Alaska- Arthur
- Charleston
Illinois
United States