The shell is secreted by a soft part of the molluscan body known as the mantle and has several layers, typically made of calcium carbonate precipitated out into an organic matrix. Bivalves are very …

6 days ago · Bivalves are a group of freshwater and marine mollusks with bilaterally symmetric and laterally compressed bodies encased in a characteristic two-part shell. They belong to the class …

Nov 3, 2025 · Bivalve, (class Bivalvia), any of more than 15,000 species of clams, oysters, mussels, scallops, and other members of the phylum Mollusca characterized by a shell that is divided from …

Jun 16, 2024 · What is a bivalve mollusk? 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.

Bivalves are a diverse group of mollusks that includes clams, oysters, scallops, and mussels. They have two shells and live in both freshwater and saltwater all over the world.

Bivalve form Two valves, halves , or shells Bilateral symmetry - both sides the same size Compressed laterally (sideways) Shell Joined by hinge ligament

Jan 26, 2001 · A bivalve is characterized by possessing two shells secreted by a mantle that extends in a sheet on either side of the body. The oldest part of the shell, the umbo , can be recognized as a …

The shell of a bivalve is composed of calcium carbonate, and consists of two, usually similar, parts called valves. These valves are for feeding and for disposal of waste.

Jan 5, 2023 · Some interior parts of bivalve shells shown in modern bivalves (clams, mussels, and scallops) with different shapes, which can be preserved in fossil bivalves. Examples are Little neck …

The bivalve shell typically consists of two calcareous, convex valves that are hinged dorsally and free ventrally. The hinge margin is typically united by a non-calcified ligament and a set of articulating …