NatureServe Conservation Status
Rounded Global Status Rank: G2 - Imperiled
Reasons: This species is known from 65-85 sites (from about 90 historic) in three river drainages. However, populations appear to be declining and there is general deterioration of habitat and water quality in some portion of its range. Recently, however, the overall range has expanded slightly as populations were discovered in new drainages.
Intrinsic Vulnerability: Highly to moderately vulnerable.
Comments: Presumable sensitive to excessive siltation and habitat modifications; typical liabilities of filter-feeders (e.g., to excessive pollutants, eutrophication, etc.); reduction in host fish populations is a possibility.
Environmental Specificity: Unknown
Other Considerations: Many species of the genus are declining, particularly the narrow and regional endemics of the Gulf coast drainages east of the Mississippi. It was considered threatened in Florida (Williams and Butler, 1994), threatened in the Escambia and Yellow River systems (Williams et al., 2000), and a species of special concern throughout its range (Williams et al., 1993).
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