Helminthocladia calvadosii
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Nemaliales
- family: Liagoraceae
- genus: Helminthocladia
- species: Helminthocladia calvadosii
Saint George
Saint George
BermudaPraia
Praia
Cape VerdeBrighton
Dawlish
Ilfracombe
Sidmouth
Weymouth
England
United Kingdom