eroded periwinkle
- kingdom: Animalia
- phylum: Mollusca
- class: Gastropoda
- order: Littorinimorpha
- family: Littorinidae
- genus: Littorina
- species: Littorina keenae
Ensenada
Baja California
Mexico
Cascais- Estoril
- Monte Estoril
Lisbon
Portugal
Bodega Bay