Littorinidae
| Littorinidae | |
|---|---|
| Two shells of the common periwinke Littorina littorea | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Mollusca | 
| Class: | Gastropoda | 
| Subclass: | Caenogastropoda | 
| Order: | Littorinimorpha | 
| Superfamily: | Littorinoidea | 
| Family: | Littorinidae Children, 1834 | 
| Subfamilies | |
| 
 | |
| Diversity | |
| Two freshwater species and numerous marine species. | |
The Littorinidae are a taxonomic family of over 200 species of sea snails, marine gastropod molluscs in the clade Littorinimorpha, commonly known as periwinkles and found worldwide.