Unionidae

The highly sensitive Unionidae mussels close their shells as soon as they encounter contaminants in the water, triggering special electronic sensors that alert operators, the agency said.

Russian Officials Enlist Mussels to Track Radiation Gregory White 2011

Unionidae are dioecious, meaning they have separate sexes.

Freshwater mussels in North America - factors affecting their endangerment and extinction 2009

Freshwater mussels (Family Unionidae) populations are declining globally due to alteration in habitat, contamination, climate change and the introduction of exotic species.

Freshwater mussels in North America - factors affecting their endangerment and extinction 2009

In North America, freshwater mussels (Unionidae) are declining at a catastrophic rate.

Freshwater mussels in North America - factors affecting their endangerment and extinction 2009

A little later he put Hyatt at work on the Unionidae, studying the anatomy as well as the shells.

Louis Agassiz as a Teacher; illustrative extracts on his method of instruction Lane Cooper

A little later he put Hyatt at work on the Unionidae, studying the anatomy as well as the shells.

Louis Agassiz as a Teacher Cooper, Lane, 1875-1959 1917

About the neck were long wampum necklaces, with _Dentalium, Unionidae_, and

A Further Contribution to the Study of the Mortuary Customs of the North American Indians 1884

The native freshwater bivalves of Illinois represent three families, of which the great majority belong to the Unionidae -- hence the term "unionid," which is often used when speaking about native mussels in general.

Zach Klein Universal Feed 2010