Bivalvia - Wikipedia
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.
Class Bivalvia - Digital Atlas of Ancient Life
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.
Evolutionary History of Bivalves - Digital Atlas of Ancient Life
The oldest known freshwater bivalves are from the Devonian, but the major non-marine radiation occurred in the Triassic with the appearance of the Unionoida, which today includes more than 960 species, and is one of the most endangered animal groups on Earth due to habitat loss and specialized life cycle.
ADW: Bivalvia: INFORMATION
Jan 26, 2001 · Bivalvia. 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.
Characteristics of bivalves | Britannica
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.
Class Bivalvia: The Wonders of Bivalves | Earth Life
Aug 26, 2020 · Class Bivalvia; a comprehensive introduction to the anatomy, ecology, and general biology of bivlaves, clams, mussels, oysters and scallops.
Clam | Anatomy, Types, Habitat, Mollusk, Bivalve & Marine Life
Oct 11, 2024 · clam, in general, any member of the invertebrate class Bivalvia—mollusks with a bivalved shell (i.e., one with two separate sections). More than 15,000 living species of bivalves are known, of which about 500 live in fresh water; the others occur in all seas.
Clams, mussels, pipis and oysters - Class Bivalvia
Bivalves are molluscs, well-known to humans who have developed a taste for many of them. This group includes oysters, mussels, pipis, cockles, scallops and clams.
Bivalvia - Wikiwand
Bivalvia, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts.
Mollusca: Bivalvia - Morphology - University of California …
Bivalves are most easily recognized by their two shells (hence "bi-valv-ia"). Their shells are comprised of a pair of laterally- compressed hinged valves and the pallial cavity surrounds the whole body.