What Are Mollusks With Two Shells Called?

What Are Mollusks With Two Shells Called? Bivalve mollusks (e.g., clams, oysters, mussels, scallops) have an external covering that is a two-part hinged shell that contains a soft-bodied invertebrate. What are mollusks with a shell called? Snails, limpets, and abalones are different types of gastropods with shells. Mollusks have a body part called the mantle