Callithamnion granulatum
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Callithamniaceae
- genus: Callithamnion
- species: Callithamnion granulatum
- Santa Maria
Sal
Cape Verde- Tossa de Mar
Catalonia- Bueu
Galicia
Spain- Hugh Town
- Isles of Scilly
- Sidmouth
England
United Kingdom