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