Bivalvia (/ b aɪ ˈ v æ l v i ə /) or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of aquatic molluscs (marine and freshwater) that have laterally compressed soft bodies enclosed by a calcified exoskeleton consisting of a hinged pair of half-shells known as valves.

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 left and right valves. The valves are connected to one another at a hinge.

Snapshot: Bivalvia. Phylum Mollusca, Class Bivalvia. Common names of representatives: clams, scallops, oysters, mussels. Habitat(s): marine (salt water), freshwater (lakes, rivers, and streams). Feeding type(s): mostly suspension feeders; some deposit feeders and carnivores. Geological range: Cambrian to today.

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 species of bivalve, found from the deepest depths of …

Bivalves are aquatic mollusks belonging to the class Bivalvia (or Pelecypoda), a group that includes the familiar and economically important clams, oysters, scallops, and mussels. 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.

2024年8月20日 · Bivalves, also known as lamellibranchs or pelecypods, are a class of mollusks distinguished by their two-part shell, which joins dorsally and encloses and protects their body. They are often found in marine environments but can also live in freshwater. Bivalves are filter feeders, meaning they strain tiny food particles from the water.

2001年1月26日 · 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 shells se­creted by a man­tle that ex­tends in a sheet on ei­ther side of the body.

bivalve, Any member of the mollusk class Bivalvia, or Pelecypoda, characterized by having a two-halved (valved) shell. Clams, cockles, mussels, oysters, scallops, and shipworms are bivalves. Most are completely enclosed by the shell, the two valves of which are joined by an elastic ligament, and by two sheets of tissue called the mantle.

Fine Seafood: scallops, clams, mussels, and more! Anyone that has ever slurped down an oyster, worn a pearl around their neck, or enjoyed the half-shells found on the beach has come into contact with bivalves. But bivalves are much more than that.

Bivalve - Mollusks, Shells, Filter Feeders: Paleontologists interpret bivalves based on shell and ligament structure, hinge teeth arrangement, and body form. Class Bivalvia has about 8,000 extant species divided into six subclasses: Palaeotaxodonta (Protobranchia), Cryptodonta, Pteriomorphia, Palaeoheterodonta, Heterodonta, and Anomalodesmata.