Ralfsia deusta
- kingdom: Chromista
- phylum: Ochrophyta
- class: Bacillariophyceae
- order:
- family:
- genus: Ralfsia
- species: Ralfsia deusta
Nortorf
Schleswig-Holstein
Germany
Berwick-Upon-Tweed
England
United Kingdom
Marblehead- Nahant
Massachusetts
United States