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.
bivalve - Encyclopedia Britannica
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.
Bivalves - Types, Examples, Characteristics, Anatomy, Diet, & Habitat
2024年5月31日 · 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 Bivalvia, a term coined by Linnaeus (1758) from two Latin words, bis (two) and valvae (leaves of a door).
What is a bivalve mollusk? - NOAA's National Ocean Service
2024年6月16日 · 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. A roughfile clam from the Flower Garden Bank National Marine Sanctuary—just one of many different bivalve mollusk species.
What Are Bivalves? 5 Examples of These Amazing Creatures
2023年11月10日 · What Are Bivalves? 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 invertebrate, usually one that has a very soft body. The shells are often round or oval.
Class Bivalvia: The Wonders of Bivalves | Earth Life
2020年8月26日 · Because they are diverse and common, bivalves are an extremely important part of the balance of many marine ecosystems. Bivalves are also important to humanity, mostly for food, but also for jewellry. More than 15 million tonnes of bivalves are harvested per year (average for the period 2010–2015).
Clams, Mussels, Oysters, Scallops: A Guide to Bivalve Mollusks
Last updated: Jun 7, 2021 • 6 min read. Bivalve mollusks are one of the world's most popular seafood options, harvested at twice the rate of crustaceans. These filter feeders taste very much like the oceans, lakes, and rivers where they live, and they make their way into a variety of classic dishes including Spanish paella, Maine-style fried ...
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.
Bivalves - British Geological Survey
Bivalves have inhabited the Earth for over 500 million years. They first appeared in the midddle Cambrian, about 300 million years before the dinosaurs. They flourished in the Mesozoic and Cenozoic eras and they abound in modern seas and oceans; their shells litter beaches across the …
Bivalve - Mollusks, Aquatic, Filter Feeders | Britannica
Bivalve - Mollusks, Aquatic, Filter Feeders: The burrowing, filter-feeding mode of life restricts bivalves to aquatic environments. Mostly found in coastal seas, their diversity is high in large rivers with suitable deltaic habitats and where the continental shelf is broad.