As a group, bivalves have no head and lack some typical molluscan organs such as the radula and the odontophore. Their gills have evolved into ctenidia, specialised organs for feeding and breathing.

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 …

Dec 5, 2025 · 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 …

The bivalve shell consists of two valves that are hinged dorsally, usually with shelly interlocking teeth (the hinge), and always with a horny ligament that connects the two valves along their dorsal …

Jan 26, 2001 · Also known as pelecypods, the approximately 15,000 species of this taxon are found in marine and freshwater habitats throughout the world. A bivalve is characterized by possessing two …

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. Bivalves are important to their …

Jul 31, 2025 · Bivalved animals represent a widespread and diverse group of aquatic invertebrates, belonging to the phylum Mollusca. They inhabit both marine and freshwater environments across the …

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.

Bivalvia ("two valves") refers to the fact that most members of this group have two-part calcareous shells, or valves, that are hinged and more or less symmetrical.

Jun 1, 2025 · Clams, mussels, oysters and shoes are invertebrate animals that share the same characteristic and are that they belong to the Bivalve class inside the edge mollusks. Inhabitants of …