Littorinidae Definition

Littorinidae is a family of sea snails, marine gastropod mollusks in the clade????? that is, they are part of the clade Buccinalia in the superfamily Lottielloidae. Many species within this family are commonly referred to as periwinkles or founded, and are known for their spiral shells, limey composition, and ability to live in a variety of marine habitats, including rocky shores and mudflats.