What are the 5 groups of bivalves?
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. The gills have evolved into ctenidia, specialised organs for feeding and breathing.
What are the 4 types of bivalves?
Bivalves include clams, scallops, oysters, and mussels. As their name implies, they have two parts of their shell, which can open and close.
What are bivalves classified?
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.
How many species of bivalves are there?
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 the oceans, to the streams in your backyard.
What are the 5 main classes of Mollusca?
Phylum Mollusca is a very diverse (85,000 species ) group of mostly marine species, with a dramatic variety of form. This phylum can be segregated into seven classes: Aplacophora, Monoplacophora, Polyplacophora, Bivalvia, Gastropoda, Cephalopoda, and Scaphopoda.
What is the scientific name for bivalves?
BivalviaBivalvia / Scientific name
What are the 4 major molluscs?
The four major groups of mollusks (phyla Mollusca) are: 1) chitons; 2) gastropods, including snails, slugs (mostly marine, but some freshwater), and nudibranches.
What are characteristics of Bivalvia?
A bivalve is characterized by possessing two shells secreted by a mantle that extends in a sheet on either side of the body. The oldest part of the shell, the umbo, can be recognized as a large hump on the anterior end of the dorsal side of each shell.
Why are they called bivalves?
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.
What are the 8 classes of Mollusca?
The Phylum Mollusca consist of 8 classes: 1) the Monoplacophora discovered in 1977; 2) the worm-like Aplacophora or solenogasters of the deep sea; 3) the also worm-like Caudofoveata; 4) the Polyplacophora, or chitons; 5) the Pelecypoda or bivalves; 6) the Gastropoda or snails; 7) the Scaphopoda, or tusk shells; and 8) …
What are the 6 types of mollusks?
Lab 6: Molluscs
- Class Scaphopoda – Tooth & tusk shells. Lab-6 01.
- Class Polyplacophora – Chitons.
- Class Gastropoda – Assorted shells.
- Class Gastropoda – An abalone.
- Class Gastropoda – A nudibranch (sea slug)
- Class Gastropoda – A terrestrial slug.
- Class Bivalvia – Assorted shells.
- Class Bivalvia – Zebra mussels.
What order are bivalves in?
Order Pholadomyoida
Integrated Taxonomic Information System – Report
| Phylum | Mollusca – mollusques, molusco, molluscs, mollusks |
| Class | Bivalvia Linnaeus, 1758 – bivalves, clams, bivalves, palourdes, bivalve, mexilhão, ostra |
| Direct Children: | |
| Order | Pholadomyoida |
| Superorder | Cryptodonta Neumayr, 1884 |
What are the 3 classes of phylum Mollusca?
The phylum Mollusca includes a wide variety of animals including the gastropods (“stomach foot”), the cephalopods (“head foot”), and the scaphopods (“boat foot”).
What are 3 characteristics of Polyplacophora?
The main characteristics of Polyplacophora include (1) elongate or oval, dorsoventrally flattened, bilaterally symmetrical, marine; (2) with dorsal shell of eight plates embedded in a tough mantle; (3) mantle-edge stiffened (called the girdle); (4) large, muscular, ventral foot (girdle and foot can act as suction cup); …
What is mean by Bivalvia?
: being or having a shell composed of two valves. bivalve. noun. Definition of bivalve (Entry 2 of 2) : any of a class (Bivalvia synonym Pelecypoda) of typically marine mollusks (such as clams, oysters, or scallops) that have a 2-valved hinged shell, are usually filter feeders, and lack a distinct head.
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.
Do bivalves have brains?
Discussion. The bivalve nervous system is tetranervous, consisting of a visceral (lateral) portion containing cerebral, pleural, and visceral ganglia located along lateral nerve cords (VNC) and a ventral (pedal) nervous system including pedal ganglia and a paired pedal cord (Yurchenko et al., 2018).
What is the taxonomy of Mollusca?
Integrated Taxonomic Information System – Report
| Infrakingdom | Protostomia |
| Superphylum | Lophozoa |
| Phylum | Mollusca – mollusques, molusco, molluscs, mollusks |
| Direct Children: | |
| Class | Bivalvia Linnaeus, 1758 – bivalves, clams, bivalves, palourdes, bivalve, mexilhão, ostra |
What are the 4 main classes of mollusks?
Classification
| Class | Major organisms |
|---|---|
| Gastropoda | all snails and slugs including abalone, limpets, conch, nudibranchs, sea hares, sea butterflies |
| Bivalvia | clams, oysters, scallops, geoducks, mussels, rudists† |
| Polyplacophora | chitons |
| Cephalopoda | squid, octopuses, cuttlefish, nautiluses, Spirula, belemnites†, ammonites† |
What kingdom are clams?
AnimalBivalvia / Kingdom
What are the 5 classes of phylum Mollusca?
What are examples of Polyplacophora?
ChitonidaNeoloricataLeptochito…MopaliidaeOnithochitonChitonina
Chitons/Lower classifications
What makes Polyplacophora unique?
What are bivalves give 5 examples?
Oysters, clams, mussels, scallops, cockles, coquinas, and many more are all part of the class Bivalvia. Most soft-bodied, aquatic animals with two shells fall into this group. Bivalves are found in all types of water.
What is unique about bivalves?
The most important feature of a bivalve is its two shells, called valves. These shells act like a protective armor, guarding the bivalve’s soft inner body parts. They can open their shells to move and feed, but at the first hint of a threat, they will rapidly close their shells.