Megalonaias

	Megalonaias ''Megalonaias'' is a genus of bivalves belonging to the family Unionidae The Unionidae are a family of freshwater mussels, the largest in the order Unionida, the bivalve molluscs sometimes known as river mussels, or simply as unionids. The range of distribution for this family is world-wide. It is at its most diverse .... The species of this genus are found in Central Asia and Northern America. Species Species: '' Megalonaias nervosa'' '' Megalonaias nickliniana'' References {{Taxonbar, from=Q3798830 Unionidae Bivalve genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Megalonaias Nervosa ''Megalonaias nervosa'' is a freshwater mussel species in the family Unionidae The Unionidae are a family of freshwater mussels, the largest in the order Unionida, the bivalve molluscs sometimes known as river mussels, or simply as unionids. The range of distribution for this family is world-wide. It is at its most diverse .... Washboard is the common name used for ''Megalonaias nervosa''. Description The shell is divided into two valves that are hinged. Shell is thick and rectangular in shape and can be compressed or inflated; umbos do not extend above the hinge line (Cicerello, R. and Schuster, G. 2003). The cardinal teeth are large and serrated, while the lateral teeth are long and curved. Shell color ranges from dark brown to black and is covered with small bumps and has fluted ridges: nacre is white to gray color. Life Cycle: Megalonaias nervosa mussels are sexually mature around 8 years of age, they are late tachytictic breeders. From July to October the males are matu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Megalonaias Nickliniana ''Megalonaias'' is a genus of bivalves belonging to the family Unionidae. The species of this genus are found in Central Asia and Northern America. Species Species: ''Megalonaias nervosa ''Megalonaias nervosa'' is a freshwater mussel species in the family Unionidae The Unionidae are a family of freshwater mussels, the largest in the order Unionida, the bivalve molluscs sometimes known as river mussels, or simply as unionids. ...'' '' Megalonaias nickliniana'' References {{Taxonbar, from=Q3798830 Unionidae Bivalve genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Unionidae The Unionidae are a family of freshwater mussels, the largest in the order Unionida, the bivalve molluscs sometimes known as river mussels, or simply as unionids. The range of distribution for this family is world-wide. It is at its most diverse in North America, with about 297 recognised taxa, but China and Southeast Asia also support very diverse faunas. Freshwater mussels occupy a wide range of habitats, but most often occupy lotic waters, i.e. flowing water such as rivers, streams and creeks. Origin and early diversification The recent phylogenetic study reveals that the Unionidae most likely originated in Southeast and East Asia in the Jurassic, with the earliest expansions into North America and Africa (since the mid-Cretaceous) followed by the colonization of Europe and India (since the Paleocene). Life history Unionidae burrow into the substrate, with their posterior margins exposed. They pump water through the incurrent aperture, obtaining oxygen and food. They remove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]