Antithamnionella pacifica
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Ceramiaceae
- genus: Antithamnionella
- species: Antithamnionella pacifica
Campbell River- North Saanich
- Sooke
- Victoria
British Columbia
Canada
Diamond Ridge- Homer
Alaska- Carmel-by-the-Sea
California- Friday Harbor
Washington
United States