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Latest Unionidae Stories

Researchers Transport Endangered Mussels To Save Them
2013-09-12 09:11:52

University of Illinois Researchers have transported two endangered freshwater mussel species from Pennsylvania to Illinois in an attempt to re-establish their populations in the western part of the Ohio River Basin. The team of biologists, led by Jeremy Tiemann, of the Illinois Natural History Survey (INHS), traveled to the site of a bridge-replacement project on Pennsylvania’s Allegheny River to collect northern riffleshell (Epioblasma rangiana) and clubshell (Pleurobema clava)...

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2012-03-13 16:24:35

A drastic decrease in the population of freshwater mussels could have dire effects on fish and humans alike. Zoologist Caryn Vaughn from Oklahoma´s Aquatic Research Facility in Norman has been researching these freshwater mussels for over 20 years. She says she´s concerned about the drastic decrease in mussel population that´s occurred in that time. Vaughn told the National Science Foundation “This one river that we´ve been working in for over 20 years, we...

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2011-08-16 06:51:40

Researchers from the Texas A&M Institute of Renewable Natural Resources have discovered fresh remains of a freshwater mussel species thought to be extinct in Texas, according to a research associate with the institute. Dr. Charles Randklev said his research team found a single individual of false spike "Quadrula mitchelli" with tissue still in the shell "” which indicates that the individual was recently alive "” in the San Saba River in Central Texas. Mussel thought to be...

2010-11-30 21:58:59

Scientists working with the Partnership for the Delaware Estuary and The Academy of Natural Sciences have made an important discovery in the Delaware River between Chester, Pennsylvania, and Trenton, New Jersey: beds of freshwater mussels. This includes several uncommon species, two of which were previously believed to no longer exist in both Pennsylvania and New Jersey. "Freshwater mussels are very sensitive to a variety of problems, including pollution, dams, water flows, loss of forests,...

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2010-03-23 10:12:46

The endangered freshwater mussel species has been given a welcome boost by scientists from Queen's University Belfast following a 12 year cultivation project. Over 300 of the mussels, which are threatened in many parts of Europe and North America, have been released back into the wild at a range of secret locations in Northern Ireland. And in a novel development, the conservation scientists from Queen's will be able to keep tabs on the precious mussels after attaching tags to the outside of...

2010-01-26 14:14:57

Biodiversity in freshwater systems is impacted as much or more by environmental change than tropical rain forests, according to University of Oklahoma Professor Caryn Vaughn, who serves as director of the Oklahoma Biological Survey. "When we think about species becoming extinct, we don't necessarily think of the common species in freshwater systems, many of which are declining," says Vaughn. "We need to be concerned about these declines, because these common species provide many goods and...

2008-08-13 15:00:29

LITTLE ROCK - The U.S. Fish and Wildlife Service plans to declare extinct the turgid-blossom pearly mussel, a species once found in the Black and White rivers in Arkansas and other parts of the South. That particular mussel species has been on the endangered species list since 1976. Wildlife officials say a five-year review found no sign of the mussel. "We really have no idea what caused it (to become extinct)," Jim Widlak, a fish and wildlife biologist, told the Arkansas Democrat-...

2008-06-24 02:29:44

TALLAHASSEE, Fla. - Florida said it intends to sue the Army Corps of Engineers for violating the Endangered Species Act, a move which could further complicate strained regional relations over shared water resources. Florida Department of Environmental Protection Secretary Michael Sole said in a letter that the Corps' plans to reduce water flow in the Apalachicola River would jeopardize threatened and endangered wildlife. The seven-page letter, dated Thursday, notes concerns by...

2005-06-07 17:44:02

USDA Forest Service (FS) research suggests that a decline in the abundance of freshwater mussels about 1000 years ago may have been caused by the large-scale cultivation of maize by Native Americans. In the April 2005 issue of Conservation Biology, Wendell Haag and Mel Warren, researchers with the FS Southern Research Station (SRS) unit in Oxford , MS, report results from a study of archaeological data from 27 prehistoric sites in the southeastern United States. Worldwide, freshwater mussels...


Latest Unionidae Reference Libraries

Chinese Pond Mussel, Sinanodonta woodiana
2013-10-11 11:20:39

The Chinese Pond Mussel (Sinanodonta woodiana), known also as the Eastern Asiatic Freshwater Clam or the Swan-mussel, is a species of freshwater mussel, an aquatic bivalve mollusk belonging to the family Uniondale, the river mussels. The shell is brown or blackish, occasionally with a greenish hue, the color varying but normally more intensively colored at the periphery. The shape is elliptical to almost spherical, with the lower margin strongly convex. It is native to Eastern Asia but...

Dwarf Wedgemussel, Alasmidonta heterodon
2013-05-17 11:15:42

The Dwarf wedge mussel, Alasmidonta Heterodon, is an endangered species of freshwater mussel, an aquatic bivalve mollusk belonging to the family Unionidae, the river mussels. This species is rare, found solely in North America’s Atlantic coast streams and rivers of a variety of sizes and moderate current. Its current range extends from Maryland to North Carolina. It is federally listed as endangered, and state listed as endangered, in Connecticut, Maryland, Massachusetts, New...

Depressed River Mussel, Pseudanodonta complanata
2013-04-26 14:47:33

The depressed river mussel or compressed river mussel, Pseudanodonta complanata, is a species of freshwater mussel, an aquatic bivalve mollusk belonging to the family Uniondae, the river mussels. The species name comes from the flattened shape of its shell. This species can be found throughout northern Europe, but it’s endangered throughout its range. While the survival of this species is considered to be threatened by pollution and the dredging of the slow moving channels of water in...

Swan Mussel, Anodonta Cygnea
2013-04-25 20:12:34

The Swan Mussel, Anodonta Cygnea, is a large species of freshwater mussel, an aquatic bivalve mollusk belonging to the family Unionidae, the river mussels. Due to its morphological variability and its wide range of distribution, there are over 500 synonyms for this species. The shell is thin but it is large and rather flat, even at the umbo. The coloration of the shell is often pale greenish or brownish. The native distribution is European-Siberian. The geographical distribution of...

Duck Mussel, Anodonta Anatina
2013-04-25 20:06:49

The Duck Mussel, Anodonta anatine, is a species of freshwater mussel, an aquatic bivalve mollusk belonging to the family Unionidae, the river mussels. The native distribution of this mussel is European-Siberian. The distribution range is Croatia, Germany, Czech Republic, Isle of Man, Netherlands, Ireland, Russia, Sweden and Slovakia. Image Caption: Duck mussel Anodonta anatina. Credit: Joel Berglund/Wikipedia

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Word of the Day
endocarp
  • The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed.
This word comes from the Greek 'endon,' in, within, plus the Greek 'kardia,' heart.
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