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Unionidae
The Unionidae are a Family (biology), 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 (mollusc), aperture, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Mussel
Freshwater bivalves are molluscs of the order Bivalvia that inhabit freshwater ecosystems. They are one of the two main groups of freshwater molluscs, along with freshwater snails. The majority of bivalve molluscs are saltwater species that live in the marine habitats, but a number of families have evolved to live in fresh water (and in some cases, also in brackish water). These belong to two different evolutionary lineages, i.e. freshwater mussels and freshwater clams, and the two groups are not closely related. Freshwater bivalves have a simple morphology that varies among taxa, and are distributed around most regions of the world. Freshwater bivalve species vary greatly in size. Some pea clams (genus '' Pisidium'') have an adult size of only . 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 , and usually lives in lakes or slow-flowing rivers. Freshwater pearl mussels are economical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unionida
Unionida is a monophyletic order (biology), order of freshwater mussels, aquatic animal, aquatic bivalve molluscs.Bieler R., Carter J.G. & Coan E.V. (2010). ''Classification of Bivalve families''. pp. 113–133, in: Bouchet P. & Rocroi J.-P. (2010), ''Nomenclator of Bivalve Families''. Malacologia 52(2): 1–184. The order includes most of the larger freshwater mussels, including the freshwater pearl mussels. The most common families are the Unionidae and the Margaritiferidae. All have in common a larval stage that is temporarily parasitic on fish, nacreous shells, high in organic matter, that may crack upon drying out, and siphon (mollusc), siphons too short to permit the animal to live deeply buried in sediment. Morphology The shells of these mussels are variable in shape, but usually equivalve and elongate. They have solid, nacreous valves with a pearly interior, radial sculpture, and an entire pallial line. Evolutionary history Although some fossil freshwater bivalves ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ambleminae
Ambleminae is a subfamily of Freshwater bivalve, freshwater mussel in the family Unionidae. They are found throughout much of eastern North America south to Central America, although fossils are also known from Siberia. Some species have also been introduced to East Asia. They are the most speciose radiation of the Unionidae, with more than 300 species. Fossils of this group date back to the Late Cretaceous. Systematics The following classification is based on MolluscaBase and the MUSSEL Project database: * Tribe Amblemini Rafinesque, 1820 ** Genus ''Amblema'' Rafinesque, 1820 ** Genus ''Plectomerus'' Conrad, 1853 ** Genus ''Reginaia'' D. C. Campbell & Lydeard, 2012 * Tribe Lampsilini Ihering, 1901 ** Genus ''Actinonaias'' Crosse & P. Fischer, 1894 ** Genus ''Arotonaias'' E. von Martens, 1900 ** Genus ''Atlanticoncha'' C. H. Smith, J. M. Pfeiffer & N. A. Johnson, 2020 ** Genus ''Cambarunio'' Watters, 2018 ** Genus ''Cyprogenia'' Agassiz, 1852 ** Genus ''Cyrtonaias'' Crosse & P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lampsilini
Ambleminae is a subfamily of freshwater mussel in the family Unionidae. They are found throughout much of eastern North America south to Central America, although fossils are also known from Siberia. Some species have also been introduced to East Asia. They are the most speciose radiation of the Unionidae, with more than 300 species. Fossils of this group date back to the Late Cretaceous. Systematics The following classification is based on MolluscaBase and the MUSSEL Project database: * Tribe Amblemini Rafinesque, 1820 ** Genus ''Amblema'' Rafinesque, 1820 ** Genus '' Plectomerus'' Conrad, 1853 ** Genus '' Reginaia'' D. C. Campbell & Lydeard, 2012 * Tribe Lampsilini Ihering, 1901 ** Genus '' Actinonaias'' Crosse & P. Fischer, 1894 ** Genus '' Arotonaias'' E. von Martens, 1900 ** Genus '' Atlanticoncha'' C. H. Smith, J. M. Pfeiffer & N. A. Johnson, 2020 ** Genus '' Cambarunio'' Watters, 2018 ** Genus '' Cyprogenia'' Agassiz, 1852 ** Genus '' Cyrtonaias'' Crosse & P. Fischer, 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lampsilis Fasciola, United States Imported From INaturalist Photo 56221328
''Lampsilis'' is a genus of freshwater mussels, aquatic bivalve mollusks in the family Unionidae, the river mussels. There are over 100 species in the genus. Aggressive mimicry Some species, notably '' Lampsilis ovata'' (pocketbook mussel) use aggressive mimicry to lure large predatory fish by using their mantleas a lure, ejecting larvae into the mouth of the fish when they strike. The larvae attach to the gills, using the fish's blood as food for several weeks. Species * '' Lampsilis abrupta'' (pink mucket) * †'' Lampsilis binominata'' (lined pocketbook) * '' Lampsilis bracteata'' * '' Lampsilis cardium'' * '' Lampsilis cariosa'' (yellow lampmussel) * '' Lampsilis dolabraeformis'' * '' Lampsilis fasciola'' (wavy-rayed lampmussel) * '' Lampsilis floridensis'' (Florida sandshell) * '' Lampsilis fullerkati'' (Waccamaw fatmucket, now considered synonymous with '' L. radiata'') * '' Lampsilis higginsii'' (Higgins' eye pearly mussel) * '' Lampsilis ornata'' * '' Lampsilis o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bivalve
Bivalvia () or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class (biology), class of aquatic animal, aquatic molluscs (marine and freshwater) that have laterally compressed soft bodies enclosed by a calcified exoskeleton consisting of a hinged pair of half-bivalve shell, shells known as valve (mollusc), valves. As a group, bivalves have no head and lack some typical molluscan organs such as the radula and the odontophore. Their gills have evolved into ctenidium (mollusc), ctenidia, specialised organs for feeding and breathing. Common bivalves include clams, oysters, Cockle (bivalve), cockles, mussels, scallops, and numerous other family (biology), families that live in saltwater, as well as a number of families that live in freshwater. Majority of the class are benthic filter feeders that bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epioblasma
''Epioblasma'' is a North American genus of freshwater mussels, Aquatic animal, aquatic bivalve mollusks in the family Unionidae, the river mussels. Most of the species in this genus have been lost in modern times, and the entire genus is threatened with the possibility of extinction. Reproduction All Unionidae are known to make use of the gills, fins, or skin of a host fish for nutrients during the larval glochidia stage. It was discovered in 2004 that female ''Epioblasma'' in the subgenus ''Torulosa'' transfer their parasitic larvae to the host fish by snapping onto the head of the fish and pumping the larvae into the host fish's gills. While using bait to lure host fish towards the larvae is common in the family Unionidae, this was the first time that "fish snapping" behavior had been observed. Examination of other species within the genus ''Epioblasma'' may further reveal unusual reproductive mechanisms. Taxonomy of the genus ''Epioblasma'' Note: Taxa with a "extinction, †" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elliptio Complanata
The eastern elliptio (''Elliptio complanata'') is a freshwater mussel in the Unionidae family, native to Canada and the United States. It is a bivalve member of the phylum Mollusca. Not only is it found in Canada and the United States, but it is frequently the most abundant species of mussel found in its home waterways. It is the most common mussel in the Delaware River and the most common mussel found in the state of New Hampshire and Vermont. It can be found in the substrate at the bottom of lakes, ponds and rivers. Size is variable, but can reach up to in length. Reproduction The eastern elliptio reproduces sexually via spawning from third week of April to second week of June. Life cycle Like most Unionidae, ''Elliptio complanata'' begins as an egg within the gills of the female elliptio, matures into a glochidium, attaches itself to a host fish species and then becomes a juvenile mussel. ''Elliptio complanata'' is known to attach to several fish species including Ame ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Potamilus
''Potamilus'' is a genus of freshwater mussels, aquatic bivalve mollusks in the family Unionidae The Unionidae are a Family (biology), 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 a ..., the river mussels. Species Species within the genus ''Potamilus'' include: * '' Potamilus alatus'' (pink heelsplitter) * '' Potamilus amphichaenus'' (Texas heelsplitter) * '' Potamilus capax'' (fat pocketbook pearly mussel) * '' Potamilus inflatus'' (inflated heelsplitter) * '' Potamilus metnecktayi'' (Salina mucket) * '' Potamilus ohiensis'' (pink papershell) * '' Potamilus purpuratus'' (bleufer) References Bivalve genera Taxonomy articles created by Polbot {{Unionidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glochidium
The glochidium (plural glochidia) is a microscopic larval stage of some freshwater mussels, aquatic bivalve mollusks in the families Unionidae and Margaritiferidae, the river mussels and European freshwater pearl mussels. These larvae are tiny and are typically between 100 and 200 micrometers, or approximately a third of the size of a grain of salt. They can be round or have hooks, attaching to the gills, fins and scales of fish (for example to the gills of a fish host species) for a period before they detach, fall to the substrate and take on the typical form of a juvenile mussel. Since a fish is active and free-swimming, this process helps distribute the mussel species to potential areas of habitat that it could not reach any other way. Before the origin of this larval form was understood, they were described as "parasitic worms" on the fish host, although under normal circumstances, glochidia do not harm fish. Overexposure or heavy infections of glochidia may however gre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyst
A cyst is a closed sac, having a distinct envelope and division compared with the nearby tissue. Hence, it is a cluster of cells that have grouped together to form a sac (like the manner in which water molecules group together to form a bubble); however, the distinguishing aspect of a cyst is that the cells forming the "shell" of such a sac are distinctly abnormal (in both appearance and behaviour) when compared with all surrounding cells for that given location. A cyst may contain air, fluids, or semi-solid material. A collection of pus is called an abscess, not a cyst. Once formed, a cyst may resolve on its own. When a cyst fails to resolve, it may need to be removed surgically, but that would depend upon its type and location. Cancer-related cysts are formed as a defense mechanism for the body following the development of mutations that lead to an uncontrolled cellular division. Once that mutation has occurred, the affected cells divide incessantly and become cancerous, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
