Erythrotrichia bertholdii
- kingdom: Plantae
- phylum: Rhodophyta
- class: Compsopogonophyceae
- order: Erythropeltidales
- family: Erythrotrichiaceae
- genus: Erythrotrichia
- species: Erythrotrichia bertholdii
Eastbourne
Hugh Town
Isles of Scilly
England
United Kingdom