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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.
The 2010 taxonomy is known as the Taxonomy of the Bivalvia (Bouchet, Rocroi, Bieler, Carter & Coan, 2010) [citation needed]. The 2010 taxonomy was published as Nomenclator of Bivalve Families with a Classification of Bivalve Families. [1] This was a revised system for classifying bivalve mollusks such as clams, oysters, scallops, mussels and so on.
Molluscs in the class Bivalvia (bivalves), sorted by taxonomic orders. Subcategories. This category has the following 20 subcategories, out of 20 total. A.
Freshwater bivalve species vary greatly in size. Some pea clams (genus Pisidium) have an adult size of only 3 mm (0.12 in). In contrast, one of the largest species of freshwater bivalves is the swan mussel from the family Unionidae; it can grow to a length of 20 cm (7.9 in), and usually lives in lakes or slow-flowing rivers.
Shell of Monodacna colorata. The shell of Monodacna colorata is broadly oval, with a weakly protruding umbo, thin but solid, moderately convex, gaping posteriorly and anteriorly (anterior gape may be weakly developed), up to 40 mm long and up to 32 mm high with convexity up to 19 mm. [2] [3] [4] It is covered with 21–36 oblique triangular radial ribs which are sharply angled on the posterior ...
Bivalves by year of formal description ... Bivalves by classification (20 C) E. Extinct bivalves (1 C, 14 P) F. Freshwater bivalves (2 C, 18 P) H. Bivalves and humans ...
Anomalodesmata is an superorder of saltwater clams, marine bivalve molluscs. [2] This grouping was formerly recognised as a taxonomic subclass. It is called a superorder in the current World Register of Marine Species, despite having no orders, to parallel it with sister taxon Imparidentia, which does have orders. [3]
Pectinida is a taxonomic order of large and medium-sized saltwater clams, marine bivalve molluscs, commonly known as scallops and their allies. [1] It is believed that they began evolutionarily in the late Middle Ordovician epoch; many species, of course, are still extant. [2]