Some common bivalve species include clams, oysters, and mussels. digging and anchoring to surfaces. The dorsal border is the edge of a bivalve's shell where the hinge is located. Examples of bivalves are clams, scallops, mussels, and oysters. There are about 80,000 living species are known in this phylum.They usually have the shell and a characteristics ventral muscular foot.In Latin, molluscs are the name of the soft nut with a thin shell, referring to the bivalve shell and the soft-bodied animal within the shell. Their body is laterally compressed and is enclosed in two pieces of shells. These animals live only in marine environment.These animals lack circulatory and excretory systems. Describe their shell 2 lateral valves connected with a hinge Class Bivalvia~ Where do these animals live? The apex is the tip or point of the shell. There are both freshwater and marine bivalve species. These bivalves use the hinges to take in food, and are also able to jet some distance away by Each side of the shell is a valve; hence gastropods, such as snails, are sometimes called univalves. 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. These mollusks are called bivalves, and include clams, oysters, and mussels. A bivalve is a type of aquatic mollusk with a two-sided, symmetrical shell. Bivalves are … Class: Bivalve. Mussels, a type of bivalve. A membrane that lines the insides of both shells of a bivalve and protects the internal organs Mollusks Soft, bilaterally symmetrical animals with head (and brain), foot region, coelom, coiled visceral mass, and usually an external or internal shell f. Dorsal border. Most live in sand or mud, and use their foot for. The two shells are joined at the dorsal end by a region called the ligament. The two valves are joined by a hinge. Mollusks are the animals which consist mentle, foot and and sometimes a shell. g. Apex. These are marine animals with a hinged shell divided into two. They have symmetry similar to our hands. The valves are connected to one another at a hinge. Which mollusc class includes all marine animals? Symmetry: These animals are bilaterally symmetrical. There are more than 15,000 species of bivalves that live in both marine and freshwater. Echinoderms are the animals which have radial symmetry and an endoskeleton made out of calcareous plate. The term mollusca are the most abduent of all animals. Habitat: Bivalves are aquatic animals. The majority of bivalves consist of two identical shells that are held together by a flexible hinge. A bivalve is characterized by possessing two shells secreted by a mantle that extends in a sheet on either side of the body. The animal's body is held protectively inside these two shells. Class Cephalopoda Which is the largest Mollusc Class? The hinge is head together by a ligament and one or two adductor muscles. example- octopus, squids. Example: marine mussel and oyster ... What are the shells of these animals used for? halves. Example: garden snail and slug (shell lost). Bivalvia (/ b aɪ ˈ v æ l v i ə /), 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. Respiration: The process of respiration is carried out by plate-like gills. 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. A valve is half the shell of a mollusk with a two-part shell. Bivalves have a plane of symmetry that cuts between their two valves. 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