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.

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 …

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 front to back into …

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 …

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.

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 …

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.

Nov 10, 2023 · Bivalves are a type of mollusk. They are part of the class Bivalvia inside the phylum Mollusca. These animals are classified by a two-part hinged shell that is hard. This shell covers an …

The bivalves are a large class of molluscs, also known as pelecypods. They have a hard calcareous shell made of two parts or 'valves'. The soft parts are inside the shell. The shell is usually bilaterally …

The second most diverse group of molluscs behind gastropods, bivalves are one of the most important members of most marine and freshwater ecosystems. In fact, there are well over 10,000 described …