Hypnea cornuta
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Gigartinales
- family: Cystocloniaceae
- genus: Hypnea
- species: Hypnea cornuta
Cartagena
Bolívar
Colombia
Port Louis
Port Louis
Mauritius
Mahonda
South
Zanzibar Central
Tanzania
Key West- Lake Clarke Shores
- Lake Worth
- Vamo
Florida
United States