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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.
Tridacna is a genus of large saltwater clams, marine bivalve molluscs in the subfamily Tridacninae, the giant clams.Many Tridacna species are threatened. They have heavy shells, fluted with 4 to 6 folds.
Exogyra is an extinct genus of fossil marine oysters in the family Gryphaeidae, the foam oysters or honeycomb oysters. [1] These bivalves were cemented by the more cupped left valve.
†Pecten acuticostatus G. B. Sowerby I, 1847 †Pecten alessii R. A. Philippi, 1836 †Pecten aletes Hertlein, 1925 †Pecten almerai (Depéret & Roman, 1910) †Pecten anapaudiensis Stoliczka, 1871
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In 2010 a new proposed classification system for the Bivalvia was published by Bieler, Carter & Coan revising the classification of the Bivalvia, including the subclass Pteriomorphia. [8] However, the following taxonomy represents the current accepted arrangement of this subclass according to the World Register of Marine Species [ 9 ]
Protobranchia is a subclass of bivalve molluscs. [1] It contains the extant orders Nuculanida, Nuculida, and Solemyida.. These are deep water clams of a small and primitive order with a taxodont hinge (composed of many similar, small teeth), generally with a central ligament pit, large labial palps which are used in deposit feeding and the gills used only for respiration, the anterior and ...
Trigoniidae is a taxonomic family of saltwater clams, marine bivalve mollusks in the superfamily Trigonioidea.There is only one living genus, Neotrigonia, but in the geological past this family was well represented, widespread and common.