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In 1977 the Tan Riffleshell was designated an endangered species throughout its entire range in Kentucky, Tennessee, and Virginia. Tan Riffleshells inhabit sand and gravel river bottom and are usually found in shallow water at the source of a river, stream, creek, or where shallow water runs swiftly. The species' decline has resulted primarily from habitat and water quality deterioration caused by pollution from mining, agriculture and construction activities. Because the Tan Riffleshell is so limited in its distribution, anything that affects its water habitat adversely could threaten its survival.

For more detailed information visit: www.ecos.fws.gov.