Ctena Gunnamatta
''Ctena'' is a genus of bivalves belonging to the family Lucinidae. The genus has a cosmopolitan distribution. Species The following species are recognised in the genus ''Ctena'': *''Ctena bella'' *''Ctena decussata'' *''Ctena delicatula'' *''Ctena divergens'' *''Ctena eburnea'' *''Ctena galapagana'' *''Ctena gunnamatta'' *''Ctena imbricatula'' *''Ctena mexicana'' *''Ctena orbiculata'' *''Ctena reevei'' *''Ctena tatei ''Ctena'' is a genus of bivalves belonging to the family Lucinidae. The genus has a cosmopolitan distribution. Species The following species are recognised in the genus ''Ctena'': *''Ctena bella'' *''Ctena decussata'' *''Ctena delicatula'' ...'' References {{Taxonbar, from=Q3805690 Lucinidae Bivalve genera ...
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Bivalve
Bivalvia (), 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. 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. The gills have evolved into ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other hard surfaces. Some bivalves, such as the scallops and file shells, can swim. The shipworms bore into wood, clay, or stone and live inside these substances. The shell of a bivalve is composed of calc ...
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