What is a bivalve marine mollusc?
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What is a bivalve marine mollusc?
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 the four types of bivalves?
Virtually all bivalves, with the possible exception of the thorny oyster Spondylus, are edible and fall into the main categories of oysters, mussels, scallops, and clams.
What is the common name for Bivalvia?
clams
Integrated Taxonomic Information System – Report
| Common Name(s): | bivalves [English] |
| clams [English] | |
| bivalves [French] | |
| palourdes [French] | |
| bivalve [Portuguese] |
Why is it called a bivalve?
Clams and their relatives (oysters, scallops, and mussels) are often called bivalves (or bivalved mollusks) because their shell is composed of two parts called valves.
Where did the Bivalvia live?
Bivalves live on the bottom of rivers, lakes and seas. Some, like scallops, lie on the surface but others burrow beneath it, where they have some protection from predators.
What do all bivalves have in common?
As a group, bivalves have no head and they lack some usual molluscan organs like the radula and the odontophore. They include the clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater. The majority are filter feeders.
What are three characteristics of bivalves?
Three of the main characteristics of bivalves are:
- Two equally sized shells that close together for protection using muscles.
- A large, muscular foot that is used to bury within the lake or ocean bottom.
- A straw-like siphon which protrudes out of the shell to take in and get rid of water and food.
Are all bivalves marine?
All bivalves are aquatic, encompassing both marine and fresh-water species.
What is a marine mollusc?
NAME. Molluscs are snail-like animals, however they do not all have shells. Molluscs include snails, sea slugs, nudibranchs, periwinkles, chitons, limpets, squid and octopus. There are seven groups (called classes) of molluscs.
Where does the Bivalvia live?
When did bivalves go extinct?
About 445 Million Years Ago: Ordovician Extinction Its major casualties were marine invertebrates including brachiopods, trilobites, bivalves and corals; many species from each of these groups went extinct during this time.
