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 …

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 …

Sep 3, 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 …

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 …

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 …

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 …

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.

May 23, 2018 · bivalve Animal that has a shell with two halves or parts hinged together. The term most usually applies to a class of molluscs – Pelecypoda or Lamellibranchiata – with left and …

Aug 20, 2024 · Explore the world of bivalve mollusks, including mussels, oysters, cockles, and clams. Discover their unique characteristics, diverse habitats, and examples of popular species.

The total marine catch of mollusks is twice that of crustaceans, and the great majority of this is bivalve. Some three million metric tons (6,615,000,000 pounds) of bivalves are harvested …