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